scummvm/engines/sky/logic.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */


#include "common/endian.h"
#include "common/rect.h"
#include "common/events.h"

#include "sky/autoroute.h"
#include "sky/compact.h"
#include "sky/control.h"
#include "sky/debug.h"
#include "sky/disk.h"
#include "sky/grid.h"
#include "sky/logic.h"
#include "sky/mouse.h"
#include "sky/music/musicbase.h"
#include "sky/text.h"
#include "sky/screen.h"
#include "sky/sky.h"
#include "sky/sound.h"
#include "sky/struc.h"

namespace Sky {

uint32 Logic::_scriptVariables[NUM_SKY_SCRIPTVARS];

void Logic::setupLogicTable() {
	static const LogicTable logicTable[] = {
		&Logic::nop,
		&Logic::logicScript,	 // 1  script processor
		&Logic::autoRoute,	 // 2  Make a route
		&Logic::arAnim,	 // 3  Follow a route
		&Logic::arTurn,	 // 4  Mega turns araound
		&Logic::alt,		 // 5  Set up new get-to script
		&Logic::anim,	 // 6  Follow a sequence
		&Logic::turn,	 // 7  Mega turning
		&Logic::cursor,	 // 8  id tracks the pointer
		&Logic::talk,	 // 9  count down and animate
		&Logic::listen,	 // 10 player waits for talking id
		&Logic::stopped,	 // 11 wait for id to move
		&Logic::choose,	 // 12 wait for player to click
		&Logic::frames,	 // 13 animate just frames
		&Logic::pause,	 // 14 Count down to 0 and go
		&Logic::waitSync,	 // 15 Set to l_script when sync!=0
		&Logic::simpleAnim,	 // 16 Module anim without x,y's
	};

	_logicTable = logicTable;
}

Logic::Logic(SkyCompact *skyCompact, Screen *skyScreen, Disk *skyDisk, Text *skyText, MusicBase *skyMusic, Mouse *skyMouse, Sound *skySound) {
	g_system->getEventManager()->registerRandomSource(_rnd, "sky");

	_skyCompact = skyCompact;
	_skyScreen = skyScreen;
	_skyDisk = skyDisk;
	_skyText = skyText;
	_skyMusic = skyMusic;
	_skySound = skySound;
	_skyMouse = skyMouse;
	_skyGrid = new Grid(_skyDisk, _skyCompact);
	_skyAutoRoute = new AutoRoute(_skyGrid, _skyCompact);

	setupLogicTable();
	setupMcodeTable();

	memset(_objectList, 0, 30 * sizeof(uint32));

	for (int i = 0; i < ARRAYSIZE(_moduleList); i++)
		_moduleList[i] = 0;
	_stackPtr = 0;

	_currentSection = 0xFF; //force music & sound reload
	initScriptVariables();
}

Logic::~Logic(void) {
	delete _skyGrid;
	delete _skyAutoRoute;

	for (int i = 0; i < ARRAYSIZE(_moduleList); i++)
		if (_moduleList[i])
			free(_moduleList[i]);
}

void Logic::initScreen0(void) {
	fnEnterSection(0, 0, 0);
	_skyMusic->startMusic(2);
	SkyEngine::_systemVars.currentMusic = 2;
}

void Logic::parseSaveData(uint32 *data) {
	if (!SkyEngine::isDemo())
		fnLeaveSection(_scriptVariables[CUR_SECTION], 0, 0);
	for (uint16 cnt = 0; cnt < NUM_SKY_SCRIPTVARS; cnt++)
		_scriptVariables[cnt] = READ_LE_UINT32(data++);
	fnEnterSection(_scriptVariables[CUR_SECTION], 0, 0);
}

bool Logic::checkProtection(void) {
	if (_scriptVariables[ENTER_DIGITS]) {
		if (_scriptVariables[CONSOLE_TYPE] == 5) // reactor code
			_scriptVariables[FS_COMMAND] = 240;
		else									 // copy protection
			_scriptVariables[FS_COMMAND] = 337;
		_scriptVariables[ENTER_DIGITS] = 0;
		return true;
	} else
		return false;
}

void Logic::engine() {
	do {
		uint16 *logicList = (uint16 *)_skyCompact->fetchCpt(_scriptVariables[LOGIC_LIST_NO]);

		while (uint16 id = *logicList++) { // 0 means end of list
			if (id == 0xffff) {
				// Change logic data address
				logicList = (uint16 *)_skyCompact->fetchCpt(*logicList);
				continue;
			}

			_scriptVariables[CUR_ID] = id;
			_compact = _skyCompact->fetchCpt(id);

			// check the id actually wishes to be processed
			if (!(_compact->status & (1 << 6)))
				continue;

			// ok, here we process the logic bit system

			if (_compact->status & (1 << 7))
				_skyGrid->removeObjectFromWalk(_compact);

			Debug::logic(_compact->logic);
			(this->*_logicTable[_compact->logic]) ();

			if (_compact->status & (1 << 7))
				_skyGrid->objectToWalk(_compact);

			// a sync sent to the compact is available for one cycle
			// only. that cycle has just ended so remove the sync.
			// presumably the mega has just reacted to it.
			_compact->sync = 0;
		}
		// usually this loop is run only once, it'll only be run a second time if the game
		// script just asked the user to enter a copy protection code.
		// this is done to prevent the copy protection screen from flashing up.
		// (otherwise it would be visible for 1/50 second)
	} while (checkProtection());
}

void Logic::nop() {}

/**
 * This function is basicly a wrapper around the real script engine. It runs
 * the script engine until a script has finished.
 * @see script()
 */
void Logic::logicScript() {
	/// Process the current mega's script
	/// If the script finishes then drop back a level

	for (;;) {
		uint16 mode = _compact->mode; // get pointer to current script
		uint16 *scriptNo = SkyCompact::getSub(_compact, mode);
		uint16 *offset   = SkyCompact::getSub(_compact, mode + 2);

		*offset = script(*scriptNo, *offset);

		if (!*offset) // script finished
			_compact->mode -= 4;
		else if (_compact->mode == mode)
			return;
	}
}

void Logic::autoRoute() {

	_compact->downFlag = _skyAutoRoute->autoRoute(_compact);
	if ((_compact->downFlag == 2) && _skyCompact->cptIsId(_compact, CPT_JOEY) &&
	   (_compact->mode == 0) && (_compact->baseSub == JOEY_OUT_OF_LIFT)) {
		   // workaround for script bug #1064113. Details unclear...
		   _compact->downFlag = 0;
	}
	if (_compact->downFlag != 1) { // route ok
		_compact->grafixProgId = _compact->animScratchId;
		_compact->grafixProgPos = 0;
	}

	_compact->logic = L_SCRIPT; // continue the script

	logicScript();
	return;
}

void Logic::arAnim() {
	/// Follow a route
	/// Mega should be in getToMode

	// only check collisions on character boundaries
	if ((_compact->xcood & 7) || (_compact->ycood & 7)) {
		mainAnim();
		return;
	}

	// On character boundary. Have we been told to wait?
	// if not - are WE colliding?

	if (_compact->waitingFor == 0xffff) { // 1st cycle of re-route does not require collision checks
		mainAnim();
		return;
	}

	if (_compact->waitingFor) {
		// ok, we've been told we've hit someone
		// we will wait until we are no longer colliding
		// with them. here we check to see if we are (still) colliding.
		// if we are then run the stop script. if not clear the flag
		// and continue.

		// remember - this could be the first ar cycle for some time,
		// we might have been told to wait months ago. if we are
		// waiting for one person then another hits us then
		// c_waiting_for will be replaced by the new mega - this is
		// fine because the later collision will almost certainly
		// take longer to clear than the earlier one.

		if (collide(_skyCompact->fetchCpt(_compact->waitingFor))) {
			stopAndWait();
			return;
		}

		// we are not in fact hitting this person so clr & continue
		// it must have registered some time ago

		_compact->waitingFor = 0; // clear id flag
	}

	// ok, our turn to check for collisions

	uint16 *logicList = (uint16 *)_skyCompact->fetchCpt(_scriptVariables[LOGIC_LIST_NO]);
	Compact *cpt = 0;

	while (uint16 id = *logicList++) { // get an id

		if (id == 0xffff) { // address change?
			logicList = (uint16 *)_skyCompact->fetchCpt(*logicList); // get new logic list
			continue;
		}

		if (id == (uint16)(_scriptVariables[CUR_ID] & 0xffff)) // is it us?
			continue;

		_scriptVariables[HIT_ID] = id; // save target id for any possible c_mini_bump
		cpt = _skyCompact->fetchCpt(id); // let's have a closer look

		if (!(cpt->status & (1 << ST_COLLISION_BIT))) // can it collide?
			continue;

		if (cpt->screen != _compact->screen) // is it on our screen?
			continue;

		if (collide(cpt)) { // check for a hit
			// ok, we've hit a mega
			// is it moving... or something else?

			if (cpt->logic != L_AR_ANIM) { // check for following route
				// it is doing something else
				// we restart our get-to script
				// first tell it to wait for us - in case it starts moving
				// ( *it may have already hit us and stopped to wait )

				_compact->waitingFor = 0xffff; // effect 1 cycle collision skip
				// tell it it is waiting for us
				cpt->waitingFor = (uint16)(_scriptVariables[CUR_ID] & 0xffff);
				// restart current script
				*SkyCompact::getSub(_compact, _compact->mode + 2) = 0;
				_compact->logic = L_SCRIPT;
				logicScript();
				return;
			}

			script(_compact->miniBump, 0);
			return;
		}
	}

	// ok, there was no collisions
	// now check for interaction request
	// *note: the interaction is always set up as an action script

	if (_compact->request) {
		_compact->mode = C_ACTION_MODE; // put into action mode
		_compact->actionSub = _compact->request;
		_compact->actionSub_off = 0;
		_compact->request = 0; // trash request
		_compact->logic = L_SCRIPT;
		logicScript();
		return;
	}

	// any flag? - or any change?
	// if change then re-run the current script, which must be
	// a position independent get-to		 ----

	if (!_compact->atWatch) { // any flag set?
		mainAnim();
		return;
	}

	// ok, there is an at watch - see if it's changed

	if (_compact->atWas == _scriptVariables[_compact->atWatch/4]) { // still the same?
		mainAnim();
		return;
	}

	// changed so restart the current script
	// *not suitable for base initiated ARing
	*SkyCompact::getSub(_compact, _compact->mode + 2) = 0;

	_compact->logic = L_SCRIPT;
	logicScript();
}

void Logic::mainAnim() {
	/// Extension of arAnim()
	_compact->waitingFor = 0; // clear possible zero-zero skip

	uint16 *sequence = _skyCompact->getGrafixPtr(_compact);
	if (!*sequence) {
		// ok, move to new anim segment
		sequence += 2;
		_compact->grafixProgPos += 2;
		if (!*sequence) { // end of route?
			// ok, sequence has finished

			// will start afresh if new sequence continues in last direction
			_compact->arAnimIndex = 0;

			_compact->downFlag = 0; // pass back ok to script
			_compact->logic = L_SCRIPT;
			logicScript();
			return;
		}

		_compact->arAnimIndex = 0; // reset position
	}

	uint16 dir;
	while ((dir = _compact->dir) != *(sequence + 1)) {
		// ok, setup turning
		_compact->dir = *(sequence + 1);

		uint16 *tt = _skyCompact->getTurnTable(_compact, dir);
		if (tt[_compact->dir]) {
			_compact->turnProgId = tt[_compact->dir];
			_compact->turnProgPos = 0;
			_compact->logic = L_AR_TURNING;
			arTurn();
			return;
		}
	};

	uint16 animId = *(uint16*)_skyCompact->getCompactElem(_compact, C_ANIM_UP + _compact->megaSet + dir * 4);
	uint16 *animList = (uint16*)_skyCompact->fetchCpt(animId);

	uint16 arAnimIndex = _compact->arAnimIndex;
	if (!animList[arAnimIndex / 2]) {
		 arAnimIndex = 0;
		_compact->arAnimIndex = 0; // reset
	}

	_compact->arAnimIndex += S_LENGTH;

	*sequence       -= animList[(S_COUNT + arAnimIndex)/2]; // reduce the distance to travel
	_compact->frame  = animList[(S_FRAME + arAnimIndex)/2]; // new graphic frame
	_compact->xcood += animList[(S_AR_X  + arAnimIndex)/2]; // update x coordinate
	_compact->ycood += animList[(S_AR_Y  + arAnimIndex)/2]; // update y coordinate
}

void Logic::arTurn() {
	uint16 *turnData = (uint16*)_skyCompact->fetchCpt(_compact->turnProgId) + _compact->turnProgPos;
	_compact->frame = *turnData++;
	_compact->turnProgPos++;

	if (!*turnData) { // turn done?
		// Back to ar mode
		_compact->arAnimIndex = 0;
		_compact->logic = L_AR_ANIM;
	}
}

void Logic::alt() {
	/// change the current script
	_compact->logic = L_SCRIPT;
	*SkyCompact::getSub(_compact, _compact->mode) = _compact->alt;
	*SkyCompact::getSub(_compact, _compact->mode + 2) = 0;
	logicScript();
}

void Logic::anim() {
	/// Follow an animation sequence
	uint16 *grafixProg = _skyCompact->getGrafixPtr(_compact);

	while (*grafixProg) {
		_compact->grafixProgPos += 3; // all types are 3 words.
		if (*grafixProg == LF_START_FX) { // do fx
			grafixProg++;
			uint16 sound = *grafixProg++;
			uint16 volume = *grafixProg++;

			// channel 0
			fnStartFx(sound, 0, volume);
		} else if (*grafixProg >= LF_START_FX) { // do sync
			grafixProg++;

			Compact *cpt = _skyCompact->fetchCpt(*grafixProg++);

			cpt->sync = *grafixProg++;
		} else { // put coordinates and frame in
			_compact->xcood = *grafixProg++;
			_compact->ycood = *grafixProg++;

			_compact->frame = *grafixProg++ | _compact->offset;
			return;
		}
	}

	_compact->downFlag = 0;
	_compact->logic = L_SCRIPT;
	logicScript();
}

void Logic::turn() {
	uint16 *turnData = (uint16*)_skyCompact->fetchCpt(_compact->turnProgId) + _compact->turnProgPos;
	if (*turnData) {
		_compact->frame = *turnData;
		_compact->turnProgPos++;
		return;
	}

	// turn_to_script:
	_compact->arAnimIndex = 0;
	_compact->logic = L_SCRIPT;

	logicScript();
}

void Logic::cursor() {
	_skyText->logicCursor(_compact, _skyMouse->giveMouseX(), _skyMouse->giveMouseY());
}

static uint16 clickTable[46] = {
	ID_FOSTER,
	ID_JOEY,
	ID_JOBS,
	ID_LAMB,
	ID_ANITA,
	ID_SON,
	ID_DAD,
	ID_MONITOR,
	ID_SHADES,
	MINI_SS,
	FULL_SS,
	ID_FOREMAN,
	ID_RADMAN,
	ID_GALLAGER_BEL,
	ID_BURKE,
	ID_BODY,
	ID_HOLO,
	ID_TREVOR,
	ID_ANCHOR,
	ID_WRECK_GUARD,
	ID_SKORL_GUARD,

	// BASE LEVEL
	ID_SC30_HENRI,
	ID_SC31_GUARD,
	ID_SC32_VINCENT,
	ID_SC32_GARDENER,
	ID_SC32_BUZZER,
	ID_SC36_BABS,
	ID_SC36_BARMAN,
	ID_SC36_COLSTON,
	ID_SC36_GALLAGHER,
	ID_SC36_JUKEBOX,
	ID_DANIELLE,
	ID_SC42_JUDGE,
	ID_SC42_CLERK,
	ID_SC42_PROSECUTION,
	ID_SC42_JOBSWORTH,

	// UNDERWORLD
	ID_MEDI,
	ID_WITNESS,
	ID_GALLAGHER,
	ID_KEN,
	ID_SC76_ANDROID_2,
	ID_SC76_ANDROID_3,
	ID_SC81_FATHER,
	ID_SC82_JOBSWORTH,

	// LINC WORLD
	ID_HOLOGRAM_B,
	12289
};

void Logic::talk() {
	// first count through the frames
	// just frames - nothing tweeky
	// the speech finishes when the timer runs out &
	// not when the animation finishes
	// this routine is very task specific

	// TODO: Check for mouse clicking

	// Are we allowed to click

	if (_skyMouse->wasClicked())
		for (int i = 0; i < ARRAYSIZE(clickTable); i++)
			if (clickTable[i] == (uint16)_scriptVariables[CUR_ID]) {
				if ((SkyEngine::_systemVars.systemFlags & SF_ALLOW_SPEECH) && (!_skySound->speechFinished()))
					_skySound->stopSpeech();
				if ((_compact->spTextId > 0) &&
					(_compact->spTextId < 0xFFFF)) {

					_skyCompact->fetchCpt(_compact->spTextId)->status = 0;
				}
				if (_skyCompact->getGrafixPtr(_compact)) {
					_compact->frame = _compact->getToFlag; // set character to stand
					_compact->grafixProgId = 0;
				}

				_compact->logic = L_SCRIPT;
				logicScript();
				return;
			}

	// If speech is allowed then check for it to finish before finishing animations

	if ((_compact->spTextId == 0xFFFF) && // is this a voc file?
		(_skySound->speechFinished())) { // finished?

		_compact->logic = L_SCRIPT; // restart character control

		if (_skyCompact->getGrafixPtr(_compact)) {
			_compact->frame = _compact->getToFlag; // set character to stand
			_compact->grafixProgId = 0;
		}

		logicScript();
		return;
	}

	uint16 *graphixProg = _skyCompact->getGrafixPtr(_compact);
	if (graphixProg) {
		if ((*graphixProg) && ((_compact->spTime != 3) || (!_skySound->speechFinished()))) {
			// we will force the animation to finish 3 game cycles
			// before the speech actually finishes - because it looks good.

			_compact->frame = *(graphixProg + 2) + _compact->offset;
			graphixProg += 3;
			_compact->grafixProgPos += 3;
		} else {
			// we ran out of frames or finished speech, let actor stand still.
			_compact->frame = _compact->getToFlag;
			_compact->grafixProgId = 0;
		}
	}

	if (_skySound->speechFinished()) _compact->spTime--;

	if (_compact->spTime == 0) {

		// ok, speech has finished

		if (_compact->spTextId) {
			Compact *cpt = _skyCompact->fetchCpt(_compact->spTextId); // get text id to kill
			cpt->status = 0; // kill the text
		}

		_compact->logic = L_SCRIPT;
		logicScript();
	}
}

void Logic::listen() {
	/// Stay in this mode until id in getToFlag leaves L_TALK mode

	Compact *cpt = _skyCompact->fetchCpt(_compact->flag);

	if (cpt->logic == L_TALK)
		return;

	_compact->logic = L_SCRIPT;
	logicScript();
}

void Logic::stopped() {
	/// waiting for another mega to move or give-up trying
	///
	/// this mode will always be set up from a special script
	/// that will be one level higher than the script we
	/// would wish to restart from

	Compact *cpt = _skyCompact->fetchCpt(_compact->waitingFor);

	if (cpt)
		if (!cpt->mood && collide(cpt))
			return;

	// we are free, continue processing the script

	// restart script one level below
	*SkyCompact::getSub(_compact, _compact->mode - 2) = 0;
	_compact->waitingFor = 0xffff;

	_compact->logic = L_SCRIPT;
	logicScript();
}

void Logic::choose() {
	// Remain in this mode until player selects some text
	if (!_scriptVariables[THE_CHOSEN_ONE])
		return;

	fnNoHuman(0, 0, 0); // kill mouse again

	SkyEngine::_systemVars.systemFlags &= ~SF_CHOOSING; // restore save/restore

	_compact->logic = L_SCRIPT; // and continue script
	logicScript();
}

void Logic::frames() {
	if (!_compact->sync)
		simpleAnim();
	else {
		_compact->downFlag = 0; // return 'ok' to script
		_compact->logic = L_SCRIPT;
		logicScript();
	}
}

void Logic::pause() {
	if (--_compact->flag)
		return;

	_compact->logic = L_SCRIPT;
	logicScript();
	return;
}

void Logic::waitSync() {
	/// checks c_sync, when its non 0
	/// the id is put back into script mode
	// use this instead of loops in the script

	if (!_compact->sync)
		return;

	_compact->logic = L_SCRIPT;
	logicScript();
}

void Logic::simpleAnim() {
	/// follow an animation sequence module whilst ignoring the coordinate data

	uint16 *grafixProg = _skyCompact->getGrafixPtr(_compact);

	// *grafix_prog: command
	while (*grafixProg) {
		_compact->grafixProgPos += 3;
		if (*grafixProg != SEND_SYNC) {
			grafixProg++;
			grafixProg++; // skip coordinates

			// *grafix_prog: frame
			if (*grafixProg >= 64)
				_compact->frame = *grafixProg;
			else
				_compact->frame = *grafixProg + _compact->offset;

			return;
		}

		grafixProg++;
		// *grafix_prog: id to sync
		Compact *compact2 = _skyCompact->fetchCpt(*grafixProg);
		grafixProg++;

		// *grafix_prog: sync
		compact2->sync = *grafixProg;
		grafixProg++;
	}

	_compact->downFlag = 0; // return 'ok' to script
	_compact->logic = L_SCRIPT;
	logicScript();
}

bool Logic::collide(Compact *cpt) {
	MegaSet *m1 = SkyCompact::getMegaSet(_compact);
	MegaSet *m2 = SkyCompact::getMegaSet(cpt);

	// target's base coordinates
	uint16 x = cpt->xcood & 0xfff8;
	uint16 y = cpt->ycood & 0xfff8;

	// The collision is direction dependent
	switch (_compact->dir) {
	case 0: // looking up
		x -= m1->colOffset; // compensate for inner x offsets
		x += m2->colOffset;

		if ((x + m2->colWidth) < _compact->xcood) // their rightmost
			return false;

		x -= m1->colWidth; // our left, their right
		if (x >= _compact->xcood)
			return false;

		y += 8; // bring them down a line
		if (y == _compact->ycood)
			return true;

		y += 8; // bring them down a line
		if (y == _compact->ycood)
			return true;

		return false;
	case 1: // looking down
		x -= m1->colOffset; // compensate for inner x offsets
		x += m2->colOffset;

		if ((x + m2->colWidth) < _compact->xcood) // their rightmoast
			return false;

		x -= m1->colWidth; // our left, their right
		if (x >= _compact->xcood)
			return false;

		y -= 8; // bring them up a line
		if (y == _compact->ycood)
			return true;

		y -= 8; // bring them up a line
		if (y == _compact->ycood)
			return true;

		return false;
	case 2: // looking left

		if (y != _compact->ycood)
			return false;

		x += m2->lastChr;
		if (x == _compact->xcood)
			return true;

		x -= 8; // out another one
		if (x == _compact->xcood)
			return true;

		return false;
	case 3: // looking right
	case 4: // talking (not sure if this makes sense...)

		if (y != _compact->ycood)
			return false;

		x -= m1->lastChr; // last block
		if (x == _compact->xcood)
			return true;

		x -= 8; // out another block
		if (x != _compact->xcood)
			return false;

		return true;
	default:
		error("Unknown Direction: %d", _compact->dir);
	}
}

void Logic::runGetOff() {
	uint32 getOff = _scriptVariables[GET_OFF];
	_scriptVariables[GET_OFF] = 0;
	if (getOff)
		script((uint16)(getOff & 0xffff), (uint16)(getOff >> 16));
}

void Logic::stopAndWait() {
	_compact->mode += 4;

	uint16 *scriptNo = SkyCompact::getSub(_compact, _compact->mode);
	uint16 *offset   = SkyCompact::getSub(_compact, _compact->mode + 2);

	*scriptNo = _compact->stopScript;
	*offset   = 0;

	_compact->logic = L_SCRIPT;
	logicScript();
}

void Logic::checkModuleLoaded(uint16 moduleNo) {
	if (!_moduleList[moduleNo])
		_moduleList[moduleNo] = (uint16 *)_skyDisk->loadFile((uint16)moduleNo + F_MODULE_0);
}

void Logic::push(uint32 a) {
	if (_stackPtr > ARRAYSIZE(_stack) - 2)
		error("Stack overflow");
	_stack[_stackPtr++] = a;
}

uint32 Logic::pop() {
	if (_stackPtr < 1 || _stackPtr > ARRAYSIZE(_stack) - 1)
		error("No items on Stack to pop");
	return _stack[--_stackPtr];
}

void Logic::setupMcodeTable() {
	static const McodeTable mcodeTable[] = {
		&Logic::fnCacheChip,
		&Logic::fnCacheFast,
		&Logic::fnDrawScreen,
		&Logic::fnAr,
		&Logic::fnArAnimate,
		&Logic::fnIdle,
		&Logic::fnInteract,
		&Logic::fnStartSub,
		&Logic::fnTheyStartSub,
		&Logic::fnAssignBase,
		&Logic::fnDiskMouse,
		&Logic::fnNormalMouse,
		&Logic::fnBlankMouse,
		&Logic::fnCrossMouse,
		&Logic::fnCursorRight,
		&Logic::fnCursorLeft,
		&Logic::fnCursorDown,
		&Logic::fnOpenHand,
		&Logic::fnCloseHand,
		&Logic::fnGetTo,
		&Logic::fnSetToStand,
		&Logic::fnTurnTo,
		&Logic::fnArrived,
		&Logic::fnLeaving,
		&Logic::fnSetAlternate,
		&Logic::fnAltSetAlternate,
		&Logic::fnKillId,
		&Logic::fnNoHuman,
		&Logic::fnAddHuman,
		&Logic::fnAddButtons,
		&Logic::fnNoButtons,
		&Logic::fnSetStop,
		&Logic::fnClearStop,
		&Logic::fnPointerText,
		&Logic::fnQuit,
		&Logic::fnSpeakMe,
		&Logic::fnSpeakMeDir,
		&Logic::fnSpeakWait,
		&Logic::fnSpeakWaitDir,
		&Logic::fnChooser,
		&Logic::fnHighlight,
		&Logic::fnTextKill,
		&Logic::fnStopMode,
		&Logic::fnWeWait,
		&Logic::fnSendSync,
		&Logic::fnSendFastSync,
		&Logic::fnSendRequest,
		&Logic::fnClearRequest,
		&Logic::fnCheckRequest,
		&Logic::fnStartMenu,
		&Logic::fnUnhighlight,
		&Logic::fnFaceId,
		&Logic::fnForeground,
		&Logic::fnBackground,
		&Logic::fnNewBackground,
		&Logic::fnSort,
		&Logic::fnNoSpriteEngine,
		&Logic::fnNoSpritesA6,
		&Logic::fnResetId,
		&Logic::fnToggleGrid,
		&Logic::fnPause,
		&Logic::fnRunAnimMod,
		&Logic::fnSimpleMod,
		&Logic::fnRunFrames,
		&Logic::fnAwaitSync,
		&Logic::fnIncMegaSet,
		&Logic::fnDecMegaSet,
		&Logic::fnSetMegaSet,
		&Logic::fnMoveItems,
		&Logic::fnNewList,
		&Logic::fnAskThis,
		&Logic::fnRandom,
		&Logic::fnPersonHere,
		&Logic::fnToggleMouse,
		&Logic::fnMouseOn,
		&Logic::fnMouseOff,
		&Logic::fnFetchX,
		&Logic::fnFetchY,
		&Logic::fnTestList,
		&Logic::fnFetchPlace,
		&Logic::fnCustomJoey,
		&Logic::fnSetPalette,
		&Logic::fnTextModule,
		&Logic::fnChangeName,
		&Logic::fnMiniLoad,
		&Logic::fnFlushBuffers,
		&Logic::fnFlushChip,
		&Logic::fnSaveCoods,
		&Logic::fnPlotGrid,
		&Logic::fnRemoveGrid,
		&Logic::fnEyeball,
		&Logic::fnCursorUp,
		&Logic::fnLeaveSection,
		&Logic::fnEnterSection,
		&Logic::fnRestoreGame,
		&Logic::fnRestartGame,
		&Logic::fnNewSwingSeq,
		&Logic::fnWaitSwingEnd,
		&Logic::fnSkipIntroCode,
		&Logic::fnBlankScreen,
		&Logic::fnPrintCredit,
		&Logic::fnLookAt,
		&Logic::fnLincTextModule,
		&Logic::fnTextKill2,
		&Logic::fnSetFont,
		&Logic::fnStartFx,
		&Logic::fnStopFx,
		&Logic::fnStartMusic,
		&Logic::fnStopMusic,
		&Logic::fnFadeDown,
		&Logic::fnFadeUp,
		&Logic::fnQuitToDos,
		&Logic::fnPauseFx,
		&Logic::fnUnPauseFx,
		&Logic::fnPrintf
	};

	_mcodeTable = mcodeTable;
}

static const uint32 forwardList1b[] = {
	JOBS_SPEECH,
	JOBS_S4,
	JOBS_ALARMED,
	JOEY_RECYCLE,
	SHOUT_SSS,
	JOEY_MISSION,
	TRANS_MISSION,
	SLOT_MISSION,
	CORNER_MISSION,
	JOEY_LOGIC,
	GORDON_SPEECH,
	JOEY_BUTTON_MISSION,
	LOB_DAD_SPEECH,
	LOB_SON_SPEECH,
	GUARD_SPEECH,
	MANTRACH_SPEECH,
	WRECK_SPEECH,
	ANITA_SPEECH,
	LAMB_FACTORY,
	FORE_SPEECH,
	JOEY_42_MISS,
	JOEY_JUNCTION_MISS,
	WELDER_MISSION,
	JOEY_WELD_MISSION,
	RADMAN_SPEECH,
	LINK_7_29,
	LINK_29_7,
	LAMB_TO_3,
	LAMB_TO_2,
	BURKE_SPEECH,
	BURKE_1,
	BURKE_2,
	DR_BURKE_1,
	JASON_SPEECH,
	JOEY_BELLEVUE,
	ANCHOR_SPEECH,
	ANCHOR_MISSION,
	JOEY_PC_MISSION,
	HOOK_MISSION,
	TREVOR_SPEECH,
	JOEY_FACTORY,
	HELGA_SPEECH,
	JOEY_HELGA_MISSION,
	GALL_BELLEVUE,
	GLASS_MISSION,
	LAMB_FACT_RETURN,
	LAMB_LEAVE_GARDEN,
	LAMB_START_29,
	LAMB_BELLEVUE,
	CABLE_MISSION,
	FOSTER_TOUR,
	LAMB_TOUR,
	FOREMAN_LOGIC,
	LAMB_LEAVE_FACTORY,
	LAMB_BELL_LOGIC,
	LAMB_FACT_2,
	START90,
	0,
	0,
	LINK_28_31,
	LINK_31_28,
	EXIT_LINC,
	DEATH_SCRIPT
};

static uint32 forwardList1b288[] = {
	JOBS_SPEECH,
	JOBS_S4,
	JOBS_ALARMED,
	JOEY_RECYCLE,
	SHOUT_SSS,
	JOEY_MISSION,
	TRANS_MISSION,
	SLOT_MISSION,
	CORNER_MISSION,
	JOEY_LOGIC,
	GORDON_SPEECH,
	JOEY_BUTTON_MISSION,
	LOB_DAD_SPEECH,
	LOB_SON_SPEECH,
	GUARD_SPEECH,
	0x68,
	WRECK_SPEECH,
	ANITA_SPEECH,
	LAMB_FACTORY,
	FORE_SPEECH,
	JOEY_42_MISS,
	JOEY_JUNCTION_MISS,
	WELDER_MISSION,
	JOEY_WELD_MISSION,
	RADMAN_SPEECH,
	LINK_7_29,
	LINK_29_7,
	LAMB_TO_3,
	LAMB_TO_2,
	0x3147,
	0x3100,
	0x3101,
	0x3102,
	0x3148,
	0x3149,
	0x314A,
	0x30C5,
	0x30C6,
	0x30CB,
	0x314B,
	JOEY_FACTORY,
	0x314C,
	0x30E2,
	0x314D,
	0x310C,
	LAMB_FACT_RETURN,
	0x3139,
	0x313A,
	0x004F,
	CABLE_MISSION,
	FOSTER_TOUR,
	LAMB_TOUR,
	FOREMAN_LOGIC,
	LAMB_LEAVE_FACTORY,
	0x3138,
	LAMB_FACT_2,
	0x004D,
	0,
	0,
	LINK_28_31,
	LINK_31_28,
	0x004E,
	DEATH_SCRIPT
};

static const uint32 forwardList2b[] = {
	STD_ON,
	STD_EXIT_LEFT_ON,
	STD_EXIT_RIGHT_ON,
	ADVISOR_188,
	SHOUT_ACTION,
	MEGA_CLICK,
	MEGA_ACTION
};

static const uint32 forwardList3b[] = {
	DANI_SPEECH,
	DANIELLE_GO_HOME,
	SPUNKY_GO_HOME,
	HENRI_SPEECH,
	BUZZER_SPEECH,
	FOSTER_VISIT_DANI,
	DANIELLE_LOGIC,
	JUKEBOX_SPEECH,
	VINCENT_SPEECH,
	EDDIE_SPEECH,
	BLUNT_SPEECH,
	DANI_ANSWER_PHONE,
	SPUNKY_SEE_VIDEO,
	SPUNKY_BARK_AT_FOSTER,
	SPUNKY_SMELLS_FOOD,
	BARRY_SPEECH,
	COLSTON_SPEECH,
	GALL_SPEECH,
	BABS_SPEECH,
	CHUTNEY_SPEECH,
	FOSTER_ENTER_COURT
};

static const uint32 forwardList4b[] = {
	WALTER_SPEECH,
	JOEY_MEDIC,
	JOEY_MED_LOGIC,
	JOEY_MED_MISSION72,
	KEN_LOGIC,
	KEN_SPEECH,
	KEN_MISSION_HAND,
	SC70_IRIS_OPENED,
	SC70_IRIS_CLOSED,
	FOSTER_ENTER_BOARDROOM,
	BORED_ROOM,
	FOSTER_ENTER_NEW_BOARDROOM,
	HOBS_END,
	SC82_JOBS_SSS
};

static const uint32 forwardList5b[] = {
	SET_UP_INFO_WINDOW,
	SLAB_ON,
	UP_MOUSE,
	DOWN_MOUSE,
	LEFT_MOUSE,
	RIGHT_MOUSE,
	DISCONNECT_FOSTER
};

void Logic::fnExec(uint16 num, uint32 a, uint32 b, uint32 c) {
	(this->*_mcodeTable[num])(a, b, c);
}

void Logic::initScriptVariables() {
	for (int i = 0; i < ARRAYSIZE(_scriptVariables); i++)
		_scriptVariables[i] = 0;

	_scriptVariables[LOGIC_LIST_NO] = 141;
	_scriptVariables[LAMB_GREET] = 62;
	_scriptVariables[JOEY_SECTION] = 1;
	_scriptVariables[LAMB_SECTION] = 2;
	_scriptVariables[S15_FLOOR] = 8371;
	_scriptVariables[GUARDIAN_THERE] = 1;
	_scriptVariables[DOOR_67_68_FLAG] = 1;
	_scriptVariables[SC70_IRIS_FLAG] = 3;
	_scriptVariables[DOOR_73_75_FLAG] = 1;
	_scriptVariables[SC76_CABINET1_FLAG] = 1;
	_scriptVariables[SC76_CABINET2_FLAG] = 1;
	_scriptVariables[SC76_CABINET3_FLAG] = 1;
	_scriptVariables[DOOR_77_78_FLAG] = 1;
	_scriptVariables[SC80_EXIT_FLAG] = 1;
	_scriptVariables[SC31_LIFT_FLAG] = 1;
	_scriptVariables[SC32_LIFT_FLAG] = 1;
	_scriptVariables[SC33_SHED_DOOR_FLAG] = 1;
	_scriptVariables[BAND_PLAYING] = 1;
	_scriptVariables[COLSTON_AT_TABLE] = 1;
	_scriptVariables[SC36_NEXT_DEALER] = 16731;
	_scriptVariables[SC36_DOOR_FLAG] = 1;
	_scriptVariables[SC37_DOOR_FLAG] = 2;
	_scriptVariables[SC40_LOCKER_1_FLAG] = 1;
	_scriptVariables[SC40_LOCKER_2_FLAG] = 1;
	_scriptVariables[SC40_LOCKER_3_FLAG] = 1;
	_scriptVariables[SC40_LOCKER_4_FLAG] = 1;
	_scriptVariables[SC40_LOCKER_5_FLAG] = 1;

	if (SkyEngine::_systemVars.gameVersion == 288)
		memcpy(_scriptVariables + 352, forwardList1b288, sizeof(forwardList1b288));
	else
		memcpy(_scriptVariables + 352, forwardList1b, sizeof(forwardList1b));

	memcpy(_scriptVariables + 656, forwardList2b, sizeof(forwardList2b));
	memcpy(_scriptVariables + 721, forwardList3b, sizeof(forwardList3b));
	memcpy(_scriptVariables + 663, forwardList4b, sizeof(forwardList4b));
	memcpy(_scriptVariables + 505, forwardList5b, sizeof(forwardList5b));
}

uint16 Logic::mouseScript(uint32 scrNum, Compact *scriptComp) {

	Compact *tmpComp = _compact;
	_compact = scriptComp;
	uint16 retVal = script((uint16)(scrNum & 0xFFFF), (uint16)(scrNum >> 16));
	_compact = tmpComp;

	if (scrNum == MENU_SELECT || (scrNum >= LINC_MENU_SELECT && scrNum <= DOC_MENU_SELECT)) {
		// HACK: See patch #1689516 for details. The short story:
		// The user has clicked on an inventory item.  We update the
		// mouse cursor instead of waiting for the script to update it.
		// In the original game the cursor is just updated when the mouse
		// moves away the item, but it's unintuitive.
		fnCrossMouse(0, 0, 0);
	}

	return retVal;
}

/**
 * This is the actual script engine.  It interprets script \a scriptNo starting at \a offset
 *
 * @param scriptNo The script to interpret.
 * 	 @arg Bits 0-11 - Script number
 * 	 @arg Bits 12-15 - Module number
 * @param offset At which offset to start interpreting the script.
 *
 * @return 0 if script finished. Else offset where to continue.
 */
uint16 Logic::script(uint16 scriptNo, uint16 offset) {
script:
	/// process a script
	/// low level interface to interpreter

	uint16 moduleNo = scriptNo >> 12;
	debug(3, "Doing Script %x", (offset << 16) | scriptNo);
	uint16 *scriptData = _moduleList[moduleNo]; // get module address

	if (!scriptData) { // We need to load the script module
		_moduleList[moduleNo] = _skyDisk->loadScriptFile(moduleNo + F_MODULE_0);
		 scriptData = _moduleList[moduleNo]; // module has been loaded
	}

	uint16 *moduleStart = scriptData;

	// Check whether we have an offset or what
	if (offset)
		scriptData = moduleStart + offset;
	else
		scriptData += scriptData[scriptNo & 0x0fff];

	uint32 a = 0, b = 0, c = 0;
	uint16 command, s;

	for (;;) {
		command = *scriptData++; // get a command
		Debug::script(command, scriptData);

		switch (command) {
		case 0: // push_variable
			push( _scriptVariables[*scriptData++ / 4] );
			break;
		case 1: // less_than
			a = pop();
			b = pop();
			if (a > b)
				push(1);
			else
				push(0);
			break;
		case 2: // push_number
			push(*scriptData++);
			break;
		case 3: // not_equal
			a = pop();
			b = pop();
			if (a != b)
				push(1);
			else
				push(0);
			break;
		case 4: // if_and
			a = pop();
			b = pop();
			if (a && b)
				push(1);
			else
				push(0);
			break;
		case 5: // skip_zero
			s = *scriptData++;

			a = pop();
			if (!a)
				scriptData += s / 2;
			break;
		case 6: // pop_var
			b = _scriptVariables[*scriptData++ / 4] = pop();
			break;
		case 7: // minus
			a = pop();
			b = pop();
			push(b-a);
			break;
		case 8: // plus
			a = pop();
			b = pop();
			push(b+a);
			break;
		case 9: // skip_always
			s = *scriptData++;
			scriptData += s / 2;
			break;
		case 10: // if_or
			a = pop();
			b = pop();
			if (a || b)
				push(1);
			else
				push(0);
			break;
		case 11: // call_mcode
			{
				a = *scriptData++;
				assert(a <= 3);
				// No, I did not forget the "break"s
				switch (a) {
				case 3:
					c = pop();
				case 2:
					b = pop();
				case 1:
					a = pop();
				}

				uint16 mcode = *scriptData++ / 4; // get mcode number
				Debug::mcode(mcode, a, b, c);

				Compact *saveCpt = _compact;
				bool ret = (this->*_mcodeTable[mcode]) (a, b, c);
				_compact = saveCpt;

				if (!ret)
					return (scriptData - moduleStart);
			}
			break;
		case 12: // more_than
			a = pop();
			b = pop();
			if (a < b)
				push(1);
			else
				push(0);
			break;
		case 14: // switch
			c = s = *scriptData++; // get number of cases

			a = pop(); // and value to switch on

			do {
				if (a == *scriptData) {
					scriptData += scriptData[1] / 2;
					scriptData++;
					break;
				}
				scriptData += 2;
			} while (--s);

			if (s == 0)
				scriptData += *scriptData / 2; // use the default
			break;
		case 15: // push_offset
			push( *(uint16 *)_skyCompact->getCompactElem(_compact, *scriptData++) );
			break;
		case 16: // pop_offset
			// pop a value into a compact
			*(uint16 *)_skyCompact->getCompactElem(_compact, *scriptData++) = (uint16)pop();
			break;
		case 17: // is_equal
			a = pop();
			b = pop();
			if (a == b)
				push(1);
			else
				push(0);
			break;
		case 18: { // skip_nz
				int16 t = *scriptData++;
				a = pop();
				if (a)
					scriptData += t / 2;
				break;
			}
		case 13:
		case 19: // script_exit
			return 0;
		case 20: // restart_script
			offset = 0;
			goto script;
		default:
			error("Unknown script command: %d", command);
		}
	}
}

bool Logic::fnCacheChip(uint32 a, uint32 b, uint32 c) {
	_skySound->fnStopFx();
	_skyDisk->fnCacheChip((uint16*)_skyCompact->fetchCpt((uint16)a));
	return true;
}

bool Logic::fnCacheFast(uint32 a, uint32 b, uint32 c) {
	_skyDisk->fnCacheFast((uint16*)_skyCompact->fetchCpt((uint16)a));
	return true;
}

bool Logic::fnDrawScreen(uint32 a, uint32 b, uint32 c) {
	debug(5, "Call: fnDrawScreen(%X, %X)",a,b);
	SkyEngine::_systemVars.currentPalette = a;
	_skyScreen->fnDrawScreen(a, b);

	if (Logic::_scriptVariables[SCREEN] == 32) {
		/* workaround for script bug #786482
		    Under certain circumstances, which never got completely cleared,
		    the gardener can get stuck in an animation, waiting for a sync
		    signal from foster.
			This is most probably caused by foster leaving the screen before
			sending the sync.
			To work around that, we simply send a sync to the gardener every time
			we enter the screen. If he isn't stuck (and thus not waiting for sync)
			it will be ignored anyways */

		debug(1, "sending gardener sync");
		fnSendSync(ID_SC32_GARDENER, 1, 0);
	}
	return true;
}

bool Logic::fnAr(uint32 x, uint32 y, uint32 c) {
	_compact->downFlag = 1; // assume failure in-case logic is interupted by speech (esp Joey)

	_compact->arTargetX = (uint16)x;
	_compact->arTargetY = (uint16)y;
	_compact->logic = L_AR; // Set to AR mode

	_compact->xcood &= 0xfff8;
	_compact->ycood &= 0xfff8;

	return false; // drop out of script
}

bool Logic::fnArAnimate(uint32 a, uint32 b, uint32 c) {
	_compact->mood = 0; // high level 'not stood still'
	_compact->logic = L_AR_ANIM;
	return false; // drop out of script
}

bool Logic::fnIdle(uint32 a, uint32 b, uint32 c) {
	// set the player idling
	_compact->logic = 0;
	return true;
}

bool Logic::fnInteract(uint32 targetId, uint32 b, uint32 c) {
	_compact->mode += 4; // next level up
	_compact->logic = L_SCRIPT;
	Compact *cpt = _skyCompact->fetchCpt(targetId);

	*SkyCompact::getSub(_compact, _compact->mode) = cpt->actionScript;
	*SkyCompact::getSub(_compact, _compact->mode + 2) = 0;

	return false;
}

bool Logic::fnStartSub(uint32 scr, uint32 b, uint32 c) {
	_compact->mode += 4;
	*SkyCompact::getSub(_compact, _compact->mode) = (uint16)(scr & 0xffff);
	*SkyCompact::getSub(_compact, _compact->mode + 2) = (uint16)(scr >> 16);
	return false;
}

bool Logic::fnTheyStartSub(uint32 mega, uint32 scr, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(mega);
	cpt->mode += 4;
	*SkyCompact::getSub(cpt, cpt->mode) = (uint16)(scr & 0xffff);
	*SkyCompact::getSub(cpt, cpt->mode + 2) = (uint16)(scr >> 16);
	return true;
}

bool Logic::fnAssignBase(uint32 id, uint32 scr, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(id);
	cpt->mode = C_BASE_MODE;
	cpt->logic = L_SCRIPT;
	cpt->baseSub     = (uint16)(scr & 0xffff);
	cpt->baseSub_off = (uint16)(scr >> 16);
	return true;
}

bool Logic::fnDiskMouse(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_DISK, 11, 11);
	return true;
}

bool Logic::fnNormalMouse(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_NORMAL, 0, 0);
	return true;
}

bool Logic::fnBlankMouse(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_BLANK, 0, 0);
	return true;
}

bool Logic::fnCrossMouse(uint32 a, uint32 b, uint32 c) {
	if (_scriptVariables[OBJECT_HELD])
		_skyMouse->fnOpenCloseHand(false);
	else
		_skyMouse->spriteMouse(MOUSE_CROSS, 4, 4);
	return true;
}

bool Logic::fnCursorRight(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_RIGHT, 9, 4);
	return true;
}

bool Logic::fnCursorLeft(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_LEFT, 0, 5);
	return true;
}

bool Logic::fnCursorDown(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_DOWN, 9, 4);
	return true;
}

bool Logic::fnCursorUp(uint32 a, uint32 b, uint32 c) {
	_skyMouse->spriteMouse(MOUSE_UP, 9, 4);
	return true;
}

bool Logic::fnOpenHand(uint32 a, uint32 b, uint32 c) {
	_skyMouse->fnOpenCloseHand(true);
	return true;
}

bool Logic::fnCloseHand(uint32 a, uint32 b, uint32 c) {
	_skyMouse->fnOpenCloseHand(false);
	return true;
}

bool Logic::fnGetTo(uint32 targetPlaceId, uint32 mode, uint32 c) {
 	_compact->upFlag = (uint16)mode; // save mode for action script
	_compact->mode += 4; // next level up
	Compact *cpt = _skyCompact->fetchCpt(_compact->place);
	if (!cpt) {
		warning("can't find _compact's getToTable. Place compact is NULL");
		return false;
	}
	uint16 *getToTable = (uint16*)_skyCompact->fetchCpt(cpt->getToTableId);
	if (!getToTable) {
		warning("Place compact's getToTable is NULL");
		return false;
	}

	while (*getToTable != targetPlaceId)
		getToTable += 2;

	// get new script
	*SkyCompact::getSub(_compact, _compact->mode) = *(getToTable + 1);
	*SkyCompact::getSub(_compact, _compact->mode + 2) = 0;

	return false; // drop out of script
}

bool Logic::fnSetToStand(uint32 a, uint32 b, uint32 c) {
	_compact->mood = 1; // high level stood still

	_compact->grafixProgId = *(uint16*)_skyCompact->getCompactElem(_compact, C_STAND_UP + _compact->megaSet + _compact->dir * 4);
	_compact->grafixProgPos = 0;

	uint16 *standList = _skyCompact->getGrafixPtr(_compact);

	_compact->offset = *standList; // get frames offset
	_compact->logic = L_SIMPLE_MOD;
	_compact->grafixProgPos++;
	simpleAnim();
	return false; // drop out of script
}

bool Logic::fnTurnTo(uint32 dir, uint32 b, uint32 c) {
	/// turn compact to direction dir

	uint16 curDir = _compact->dir; // get current direction
	_compact->dir = (uint16)(dir & 0xffff); // set new direction

	uint16 *tt = _skyCompact->getTurnTable(_compact, curDir);

	if (!tt[dir])
		return true; // keep going

	_compact->turnProgId = tt[dir]; // put turn program in
	_compact->turnProgPos = 0;
	_compact->logic = L_TURNING;

	turn();

	return false; // drop out of script
}

bool Logic::fnArrived(uint32 scriptVar, uint32 b, uint32 c) {
	_compact->leaving = (uint16)(scriptVar & 0xffff);
	_scriptVariables[scriptVar/4]++;
	return true;
}

bool Logic::fnLeaving(uint32 a, uint32 b, uint32 c) {
	_compact->atWatch = 0;

	if (_compact->leaving) {
		_scriptVariables[_compact->leaving/4]--;
		_compact->leaving = 0; // I shall do this only once
	}

	return true; // keep going
}

bool Logic::fnSetAlternate(uint32 scr, uint32 b, uint32 c) {
	_compact->alt = (uint16)(scr & 0xffff);
	_compact->logic = L_ALT;
	return false;
}

bool Logic::fnAltSetAlternate(uint32 target, uint32 scr, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(target);
	cpt->alt = (uint16)(scr & 0xffff);
	cpt->logic = L_ALT;
	return false;
}

bool Logic::fnKillId(uint32 id, uint32 b, uint32 c) {
	if (id) {
		Compact *cpt = _skyCompact->fetchCpt(id);
		if (cpt->status & (1 << 7))
			_skyGrid->removeObjectFromWalk(cpt);
		cpt->status = 0;
	}
	return true;
}

bool Logic::fnNoHuman(uint32 a, uint32 b, uint32 c) {
	if (!_scriptVariables[MOUSE_STOP]) {
		_scriptVariables[MOUSE_STATUS] &= 1;
		runGetOff();
		fnBlankMouse(0, 0, 0);
	}
	return true;
}

bool Logic::fnAddHuman(uint32 a, uint32 b, uint32 c) {
	return _skyMouse->fnAddHuman();
}

bool Logic::fnAddButtons(uint32 a, uint32 b, uint32 c) {
	_scriptVariables[MOUSE_STATUS] |= 4;
	return true;
}

bool Logic::fnNoButtons(uint32 a, uint32 b, uint32 c) {
	//remove the mouse buttons
	_scriptVariables[MOUSE_STATUS] &= 0xFFFFFFFB;
	return true;
}

bool Logic::fnSetStop(uint32 a, uint32 b, uint32 c) {
	_scriptVariables[MOUSE_STOP] |= 1;
	return true;
}

bool Logic::fnClearStop(uint32 a, uint32 b, uint32 c) {
	_scriptVariables[MOUSE_STOP] = 0;
	return true;
}

bool Logic::fnPointerText(uint32 a, uint32 b, uint32 c) {
	_skyText->fnPointerText(a, _skyMouse->giveMouseX(), _skyMouse->giveMouseY());
	return true;
}

bool Logic::fnQuit(uint32 a, uint32 b, uint32 c) {
	return false;
}

bool Logic::fnSpeakMe(uint32 targetId, uint32 mesgNum, uint32 animNum) {
	stdSpeak(_skyCompact->fetchCpt(targetId), mesgNum, animNum, 0);
	return false; 	//drop out of script
}

bool Logic::fnSpeakMeDir(uint32 targetId, uint32 mesgNum, uint32 animNum) {
	//must be player so don't cause script to drop out
	//this function sets the directional option whereby
	//the anim chosen is linked to c_dir
	animNum += _compact->dir << 1;	//2 sizes (large and small)
	return fnSpeakMe(targetId, mesgNum, animNum);
}

bool Logic::fnSpeakWait(uint32 id, uint32 message, uint32 animation) {
	// non player mega char speaks
	// player will wait for it to finish before continuing script processing
	_compact->flag = (uint16)(id & 0xffff);
	_compact->logic = L_LISTEN;
	return fnSpeakMe(id, message, animation);
}

bool Logic::fnSpeakWaitDir(uint32 a, uint32 b, uint32 c) {
	/* non player mega chr$ speaks	S2(20Jan93tw)
	the player will wait for it to finish
	before continuing script processing
	this function sets the directional option whereby
	the anim chosen is linked to c_dir -

	_compact is player
	a is ID to speak (not us)
	b is text message number
	c is base of mini table within anim_talk_table */

#ifdef __DC__
	__builtin_alloca(4); // Works around a gcc bug (wrong-code/11736)
#endif

	_compact->flag = (uint16)a;
	_compact->logic = L_LISTEN;

	Compact *speaker = _skyCompact->fetchCpt(a);
	if (c) {
		c += speaker->dir << 1;
		stdSpeak(speaker, b, c, speaker->dir << 1);
	} else
		stdSpeak(speaker, b, c, 0);

	return false;
}

bool Logic::fnChooser(uint32 a, uint32 b, uint32 c) {

	// setup the text questions to be clicked on
	// read from TEXT1 until 0

	SkyEngine::_systemVars.systemFlags |= SF_CHOOSING; // can't save/restore while choosing

	_scriptVariables[THE_CHOSEN_ONE] = 0; // clear result

	uint32 *p = _scriptVariables + TEXT1;
	uint16 ycood = TOP_LEFT_Y; // rolling coordinate

	while (*p) {
		uint32 textNum = *p++;

		struct lowTextManager_t lowText = _skyText->lowTextManager(textNum, GAME_SCREEN_WIDTH, 0, 241, 0);

		uint8 *data = lowText.textData;

		// stipple the text

		uint32 size = ((dataFileHeader *)data)->s_height * ((dataFileHeader *)data)->s_width;
		uint32 index = 0;
		uint32 width = ((dataFileHeader *)data)->s_width;

		data += sizeof(dataFileHeader);

		while (index < size) {
			if (index % width <= 1)
				index ^= 1; //index++;
			if (!data[index])
				data[index] = 1;
			index += 2;
		}

		Compact *textCompact = _skyCompact->fetchCpt(lowText.compactNum);

		textCompact->getToFlag = (uint16)textNum;
		textCompact->downFlag = (uint16)*p++; // get animation number

		textCompact->status |= ST_MOUSE; // mouse detects

		textCompact->xcood = TOP_LEFT_X; // set coordinates
		textCompact->ycood = ycood;
		ycood += 12;
	}

	if (p == _scriptVariables + TEXT1)
		return true;

	_compact->logic = L_CHOOSE; // player frozen until choice made
	fnAddHuman(0, 0, 0); // bring back mouse

	return false;
}

bool Logic::fnHighlight(uint32 itemNo, uint32 pen, uint32 c) {
	pen -= 11;
	pen ^= 1;
	pen += 241;
	Compact *textCompact = _skyCompact->fetchCpt(itemNo);
	uint8 *sprData = (uint8 *)SkyEngine::fetchItem(textCompact->flag);
	_skyText->changeTextSpriteColour(sprData, (uint8)pen);
	return true;
}

bool Logic::fnTextKill(uint32 a, uint32 b, uint32 c) {
	/// Kill of text items that are mouse detectable

	uint32 id = FIRST_TEXT_COMPACT;

	for (int i = 10; i > 0; i--) {
		Compact *cpt = _skyCompact->fetchCpt(id);
		if (cpt->status & (1 << 4))
			cpt->status = 0;
		id++;
	}
	return true;
}

bool Logic::fnStopMode(uint32 a, uint32 b, uint32 c) {
	_compact->logic = L_STOPPED;
	return false;
}

bool Logic::fnWeWait(uint32 id, uint32 b, uint32 c) {
	/// We have hit another mega
	/// we are going to wait for it to move

	_compact->waitingFor = (uint16) id;
	stopAndWait();
	return true; // not sure about this
}

bool Logic::fnSendSync(uint32 mega, uint32 sync, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(mega);
	cpt->sync = (uint16)(sync & 0xffff);
	return false;
}

bool Logic::fnSendFastSync(uint32 mega, uint32 sync, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(mega);
	cpt->sync = (uint16)(sync & 0xffff);
	return true;
}

bool Logic::fnSendRequest(uint32 target, uint32 scr, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(target);
	cpt->request = (uint16)(scr & 0xffff);
	return false;
}

bool Logic::fnClearRequest(uint32 target, uint32 b, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(target);
	cpt->request = 0;
	return true;
}

bool Logic::fnCheckRequest(uint32 a, uint32 b, uint32 c) {
	/// check for interaction request

	if (!_compact->request)
		return true;

	_compact->mode = C_ACTION_MODE; // into action mode

	_compact->actionSub = _compact->request;
	_compact->actionSub_off = 0;

	_compact->request = 0; // trash request
	return false; // drop from script
}

bool Logic::fnStartMenu(uint32 firstObject, uint32 b, uint32 c) {
	/// initialise the top menu bar
	// firstObject is o0 for game menu, k0 for linc

	uint i;
	firstObject /= 4;

	// (1) FIRST, SET UP THE 2 ARROWS SO THEY APPEAR ON SCREEN

	Compact *cpt = _skyCompact->fetchCpt(47);
	cpt->status = ST_MOUSE + ST_FOREGROUND + ST_LOGIC + ST_RECREATE;
	cpt->screen = (uint16)(_scriptVariables[SCREEN] & 0xffff);

	cpt = _skyCompact->fetchCpt(48);
	cpt->status = ST_MOUSE + ST_FOREGROUND + ST_LOGIC + ST_RECREATE;
	cpt->screen = (uint16)(_scriptVariables[SCREEN] & 0xffff);

	// (2) COPY OBJECTS FROM NON-ZERO INVENTORY VARIABLES INTO OBJECT DISPLAY LIST (& COUNT THEM)

	// sort the objects and pad with blanks

	uint32 menuLength = 0;
	for (i = firstObject; i < firstObject + ARRAYSIZE(_objectList); i++) {
		if ( _scriptVariables[i] )
			_objectList[menuLength++] = _scriptVariables[i];
	}
	_scriptVariables[MENU_LENGTH] = menuLength;

	// (3) OK, NOW TOP UP THE LIST WITH THE REQUIRED NO. OF BLANK OBJECTS (for min display length 11)

	uint32 blankID = 51;
	for (i = menuLength; i < 11; i++)
		_objectList[i] = blankID++;

	// (4) KILL ID's OF ALL 20 OBJECTS SO UNWANTED ICONS (SCROLLED OFF) DON'T REMAIN ON SCREEN
	// (There should be a better way of doing this - only kill id of 12th item when menu has scrolled right)

	for (i = 0; i < ARRAYSIZE(_objectList); i++) {
		if (_objectList[i])
			(_skyCompact->fetchCpt(_objectList[i]))->status = ST_LOGIC;
		else break;
	}

	// (5) NOW FIND OUT WHICH OBJECT TO START THE DISPLAY FROM (depending on scroll offset)

	if (menuLength < 11) // check we can scroll
		_scriptVariables[SCROLL_OFFSET] = 0;
	else if (menuLength < _scriptVariables[SCROLL_OFFSET] + 11)
		_scriptVariables[SCROLL_OFFSET] = menuLength - 11;

	// (6) AND FINALLY, INITIALISE THE 11 OBJECTS SO THEY APPEAR ON SCREEEN

	uint16 rollingX = TOP_LEFT_X + 28;
	for (i = 0; i < 11; i++) {
		cpt = _skyCompact->fetchCpt(
				_objectList[_scriptVariables[SCROLL_OFFSET] + i]);

		cpt->status = ST_MOUSE + ST_FOREGROUND + ST_LOGIC + ST_RECREATE;
		cpt->screen = (uint16)(_scriptVariables[SCREEN] & 0xffff);

		cpt->xcood = rollingX;
		rollingX += 24;

		if (_scriptVariables[MENU] == 2)
			cpt->ycood = 136;
		else
			cpt->ycood = 112;
	}

	return true;
}

bool Logic::fnUnhighlight(uint32 item, uint32 b, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(item);
	cpt->frame--;
	cpt->getToFlag = 0;
	return true;
}

bool Logic::fnFaceId(uint32 otherId, uint32 b, uint32 c) {
	/// return the direction to turn to face another id
	/// pass back result in c_just_flag

	Compact *cpt = _skyCompact->fetchCpt(otherId);

	int16 x = _compact->xcood - cpt->xcood;

	if (x < 0) { // we're to the left
		x = -x;
		_compact->getToFlag = 3;
	} else { // it's to the left
		_compact->getToFlag = 2;
	}

	// now check y

	// we must find the true bottom of the sprite
	// it is not enough to use y coord because changing
	// sprite offsets can ruin the formula - instead we
	// will use the bottom of the mouse collision area

	int16 y = _compact->ycood - (cpt->ycood + cpt->mouseRelY + cpt->mouseSizeY);

	if (y < 0) { // it's below
		y = -y;
		if (y >= x)
			_compact->getToFlag = 1;
	} else { // it's above
		if (y >= x)
			_compact->getToFlag = 0;
	}
	return true;
}

bool Logic::fnForeground(uint32 sprite, uint32 b, uint32 c) {
	/// Make sprite a foreground sprite
	Compact *cpt = _skyCompact->fetchCpt(sprite);
	cpt->status &= 0xfff8;
	cpt->status |= ST_FOREGROUND;
	return true;
}

bool Logic::fnBackground(uint32 a, uint32 b, uint32 c) {
	/// Make us a background sprite
	_compact->status &= 0xfff8;
	_compact->status |= ST_BACKGROUND;
	return true;
}

bool Logic::fnNewBackground(uint32 sprite, uint32 b, uint32 c) {
	/// Make sprite a background sprite
	Compact *cpt = _skyCompact->fetchCpt(sprite);
	cpt->status &= 0xfff8;
	cpt->status |= ST_BACKGROUND;
	return true;
}

bool Logic::fnSort(uint32 mega, uint32 b, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(mega);
	cpt->status &= 0xfff8;
	cpt->status |= ST_SORT;
	return true;
}

bool Logic::fnNoSpriteEngine(uint32 a, uint32 b, uint32 c) {
	/// stop the compact printing
	/// remove foreground, background & sort
	_compact->status &= 0xfff8;
	return true;
}

bool Logic::fnNoSpritesA6(uint32 us, uint32 b, uint32 c) {
	/// stop the compact printing
	/// remove foreground, background & sort
	Compact *cpt = _skyCompact->fetchCpt(us);
	cpt->status &= 0xfff8;
	return true;
}

bool Logic::fnResetId(uint32 id, uint32 resetBlock, uint32 c) {
	/// used when a mega is to be restarted
	/// eg - when a smaller mega turn to larger
	/// - a mega changes rooms...

	Compact *cpt = _skyCompact->fetchCpt(id);
	uint16 *rst = (uint16 *)_skyCompact->fetchCpt(resetBlock);

	if (!cpt) {
		warning("fnResetId(): Compact %d (id) == NULL", id);
		return true;
	}
	if (!rst) {
		warning("fnResetId(): Compact %d (resetBlock) == NULL", resetBlock);
		return true;
	}

	uint16 off;
	while ((off = *rst++) != 0xffff)
		*(uint16 *)_skyCompact->getCompactElem(cpt, off) = *rst++;
	return true;
}

bool Logic::fnToggleGrid(uint32 a, uint32 b, uint32 c) {
	/// Toggle a mega's grid plotting
	_compact->status ^= ST_GRID_PLOT;
	return true;
}

bool Logic::fnPause(uint32 cycles, uint32 b, uint32 c) {
	/// Set mega to L_PAUSE
	_compact->flag = (uint16)(cycles & 0xffff);
	_compact->logic = L_PAUSE;
	return false; // drop out of script
}

bool Logic::fnRunAnimMod(uint32 animNo, uint32 b, uint32 c) {
	_compact->grafixProgId = animNo;
	_compact->grafixProgPos = 0;

	_compact->offset = *_skyCompact->getGrafixPtr(_compact);
	_compact->grafixProgPos++;
	_compact->logic = L_MOD_ANIMATE;
	anim();
	return false; // drop from script
}

bool Logic::fnSimpleMod(uint32 animSeqNo, uint32 b, uint32 c) {
	_compact->grafixProgId = animSeqNo;
	_compact->grafixProgPos = 0;

	_compact->logic = L_SIMPLE_MOD;
	_compact->offset = *_skyCompact->getGrafixPtr(_compact);
	_compact->grafixProgPos++;
	simpleAnim();
	return false;
}

bool Logic::fnRunFrames(uint32 sequenceNo, uint32 b, uint32 c) {
	_compact->grafixProgId = sequenceNo;
	_compact->grafixProgPos = 0;

	_compact->logic = L_FRAMES;
	_compact->offset = *_skyCompact->getGrafixPtr(_compact);
	_compact->grafixProgPos++;
	simpleAnim();
	return false;
}

bool Logic::fnAwaitSync(uint32 a, uint32 b, uint32 c) {
	if (_compact->sync)
		return true;

	_compact->logic = L_WAIT_SYNC;
	return false;
}

bool Logic::fnIncMegaSet(uint32 a, uint32 b, uint32 c) {
	_compact->megaSet += NEXT_MEGA_SET;
	return true;
}

bool Logic::fnDecMegaSet(uint32 a, uint32 b, uint32 c) {
	_compact->megaSet -= NEXT_MEGA_SET;
	return true;
}

bool Logic::fnSetMegaSet(uint32 mega, uint32 setNo, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(mega);
	cpt->megaSet = (uint16) (setNo * NEXT_MEGA_SET);
	return true;
}

bool Logic::fnMoveItems(uint32 listNo, uint32 screenNo, uint32 c) {
	// Move a list of id's to another screen
	uint16 *p = (uint16*)_skyCompact->fetchCpt(CPT_MOVE_LIST);
	p = (uint16*)_skyCompact->fetchCpt(p[listNo]);
	for (int i = 0; i < 2; i++) {
		if (!*p)
			return true;
		Compact *cpt = _skyCompact->fetchCpt(*p++);
		cpt->screen = (uint16)(screenNo & 0xffff);
	}
	return true;
}

bool Logic::fnNewList(uint32 a, uint32 b, uint32 c) {
	/// Reset the chooser list
	for (int i = 0; i < 16; i++)
		_scriptVariables[TEXT1 + i] = 0;
	return true;
}

bool Logic::fnAskThis(uint32 textNo, uint32 animNo, uint32 c) {
	// find first free position
	uint32 *p = _scriptVariables + TEXT1;
	while (*p)
		p += 2;
	*p++ = textNo;
	*p = animNo;
	return true;
}

bool Logic::fnRandom(uint32 a, uint32 b, uint32 c) {
	_scriptVariables[RND] = _rnd.getRandomNumber(65536) & a;
	return true;
}

bool Logic::fnPersonHere(uint32 id, uint32 room, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(id);
	_scriptVariables[RESULT] = cpt->screen == room ? 1 : 0;
	return true;
}

bool Logic::fnToggleMouse(uint32 a, uint32 b, uint32 c) {

	_skyCompact->fetchCpt(a)->status ^= ST_MOUSE;
	return true;
}

bool Logic::fnMouseOn(uint32 a, uint32 b, uint32 c) {
	//switch on the mouse highlight
	Compact *cpt = _skyCompact->fetchCpt(a);
	cpt->status |= ST_MOUSE;
	return true;
}

bool Logic::fnMouseOff(uint32 a, uint32 b, uint32 c) {
	//switch off the mouse highlight
	Compact *cpt = _skyCompact->fetchCpt(a);
	cpt->status &= ~ST_MOUSE;
	return true;
}

bool Logic::fnFetchX(uint32 id, uint32 b, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(id);
	_scriptVariables[RESULT] = cpt->xcood;
	return true;
}

bool Logic::fnFetchY(uint32 id, uint32 b, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(id);
	_scriptVariables[RESULT] = cpt->ycood;
	return true;
}

bool Logic::fnTestList(uint32 id, uint32 x, uint32 y) {
	_scriptVariables[RESULT] = 0; // assume fail
	uint16 *list = (uint16 *)_skyCompact->fetchCpt(id);

	while (*list) {
		if ((x >= list[0]) && (x < list[1]) && (y >= list[2]) && (y < list[3]))
			_scriptVariables[RESULT] = list[4];
		list += 5;
	}
	return true;
}

bool Logic::fnFetchPlace(uint32 id, uint32 b, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(id);
	_scriptVariables[RESULT] = cpt->place;
	return true;
}

bool Logic::fnCustomJoey(uint32 id, uint32 b, uint32 c) {
	/// return id's x & y coordinate & c_mood (i.e. stood still yes/no)
	/// used by Joey-Logic - done in code like this because scripts can't
	/// get access to another megas compact as easily

	Compact *cpt = _skyCompact->fetchCpt(id);

	_scriptVariables[PLAYER_X] = cpt->xcood;
	_scriptVariables[PLAYER_Y] = cpt->ycood;
	_scriptVariables[PLAYER_MOOD] = cpt->mood;
	_scriptVariables[PLAYER_SCREEN] = cpt->screen;
	return true;
}

bool Logic::fnSetPalette(uint32 a, uint32 b, uint32 c) {
	_skyScreen->setPaletteEndian((uint8 *)_skyCompact->fetchCpt(a));
	SkyEngine::_systemVars.currentPalette = a;
	return true;
}

bool Logic::fnTextModule(uint32 a, uint32 b, uint32 c) {
	_skyText->fnTextModule(a, b);
	return true;
}

bool Logic::fnChangeName(uint32 id, uint32 textNo, uint32 c) {
	Compact *cpt = _skyCompact->fetchCpt(id);
	cpt->cursorText = (uint16) textNo;
	return true;
}

bool Logic::fnMiniLoad(uint32 a, uint32 b, uint32 c) {
	_skyDisk->fnMiniLoad((uint16)a);
	return true;
}

bool Logic::fnFlushBuffers(uint32 a, uint32 b, uint32 c) {
	_skyDisk->fnFlushBuffers();
	return true;
}

bool Logic::fnFlushChip(uint32 a, uint32 b, uint32 c) {
	// this should be done automatically
	return true;
}

bool Logic::fnSaveCoods(uint32 a, uint32 b, uint32 c) {
	_skyMouse->fnSaveCoods();
	return true;
}

bool Logic::fnPlotGrid(uint32 x, uint32 y, uint32 width) {
	_skyGrid->plotGrid(x, y, width, _compact);
	return true;
}

bool Logic::fnRemoveGrid(uint32 x, uint32 y, uint32 width) {
	_skyGrid->removeGrid(x, y, width, _compact);
	return true;
}

bool Logic::fnEyeball(uint32 id, uint32 b, uint32 c) {
	// set 'result' to frame no. pointing to foster, according to table used
	// eg. FN_eyeball (id_eye_90_table);

	uint16 *eyeTable = (uint16 *)_skyCompact->fetchCpt(id);
	Compact *cpt = _skyCompact->fetchCpt(ID_BLUE_FOSTER);

	uint32 x = cpt->xcood; // 168 < x < 416
	x -= 168;
	x >>= 3;

	uint32 y = cpt->ycood; // 256 < y < 296
	y -= 256;
	y <<= 2;

	_scriptVariables[RESULT] = eyeTable[x + y] + S91;
	return true;
}

bool Logic::fnLeaveSection(uint32 sectionNo, uint32 b, uint32 c) {
	if (SkyEngine::isDemo())
		_skyControl->showGameQuitMsg();

	if (sectionNo == 5) //linc section - has different mouse icons
		_skyMouse->replaceMouseCursors(60301);

	return true;
}

bool Logic::fnEnterSection(uint32 sectionNo, uint32 b, uint32 c) {

	if (SkyEngine::isDemo() && (sectionNo > 2))
		_skyControl->showGameQuitMsg();

	_scriptVariables[CUR_SECTION] = sectionNo;
	SkyEngine::_systemVars.currentMusic = 0;

	if (sectionNo == 5) //linc section - has different mouse icons
		_skyMouse->replaceMouseCursors(60302);

	if ((sectionNo != _currentSection) || (SkyEngine::_systemVars.systemFlags & SF_GAME_RESTORED)) {
		_currentSection = sectionNo;

		sectionNo++;
		_skyMusic->loadSection((byte)sectionNo);
		_skySound->loadSection((byte)sectionNo);
		_skyGrid->loadGrids();
		SkyEngine::_systemVars.systemFlags &= ~SF_GAME_RESTORED;
	}

	return true;
}

bool Logic::fnRestoreGame(uint32 a, uint32 b, uint32 c) {
	_skyControl->doLoadSavePanel();
	return false;
}

bool Logic::fnRestartGame(uint32 a, uint32 b, uint32 c) {
	_skyControl->restartGame();
	return false;
}

bool Logic::fnNewSwingSeq(uint32 a, uint32 b, uint32 c) {
	// only certain files work on pc. (huh?! something we should take care of?)
	if ((a == 85) || (a == 106) || (a == 75) || (a == 15)) {
		_skyScreen->startSequenceItem((uint16)a);
	} else {
		debug(1,"Logic::fnNewSwingSeq: ignored seq %d",a);
	}
	return true;
}

bool Logic::fnWaitSwingEnd(uint32 a, uint32 b, uint32 c) {
	_skyScreen->waitForSequence();
	return true;
}

bool Logic::fnSkipIntroCode(uint32 a, uint32 b, uint32 c) {
	SkyEngine::_systemVars.pastIntro = true;
	return true;
}

bool Logic::fnBlankScreen(uint32 a, uint32 b, uint32 c) {
	_skyScreen->clearScreen();
	return true;
}

bool Logic::fnPrintCredit(uint32 a, uint32 b, uint32 c) {

	lowTextManager_t creditText = _skyText->lowTextManager(a, 240, 0, 248, true);
	Compact *credCompact = _skyCompact->fetchCpt(creditText.compactNum);
	credCompact->xcood = 168;
	if ((a == 558) && (c == 215))
		credCompact->ycood = 211;
	else
		credCompact->ycood = (uint16)c;
	_scriptVariables[RESULT] = creditText.compactNum;
	return true;
}

bool Logic::fnLookAt(uint32 a, uint32 b, uint32 c) {

	struct lowTextManager_t textInfo = _skyText->lowTextManager(a, 240, 0, 248, true);
	Compact *textCpt = _skyCompact->fetchCpt(textInfo.compactNum);
	textCpt->xcood = 168;
	textCpt->ycood = (uint16)c;

	_skyScreen->recreate();
	_skyScreen->spriteEngine();
	_skyScreen->flip();

	fnNoHuman(0, 0, 0);
	_skyMouse->lockMouse();

	_skyMouse->waitMouseNotPressed(800);

	_skyMouse->unlockMouse();
	fnAddHuman(0, 0, 0);
	textCpt->status = 0;

	return true;
}

bool Logic::fnLincTextModule(uint32 textPos, uint32 textNo, uint32 buttonAction) {

	uint16 cnt;
	if (buttonAction & 0x8000)
		for (cnt = LINC_DIGIT_0; cnt <= LINC_DIGIT_9; cnt++)
			_scriptVariables[cnt] = 0;
	buttonAction &= 0x7FFF;
	if (buttonAction < 10)
		_scriptVariables[LINC_DIGIT_0 + buttonAction] = textNo;

	lowTextManager_t text = _skyText->lowTextManager(textNo, 220, 0, 215, false);

	Compact *textCpt = _skyCompact->fetchCpt(text.compactNum);

	if (textPos < 20) { // line number (for text)
		textCpt->xcood = 152;
		textCpt->ycood = (uint16)textPos * 13 + 170;
	} else if (textPos > 20) { // x coordinate (for numbers)
		textCpt->xcood = (uint16)textPos;
		textCpt->ycood = 214;
	} else warning("::fnLincTextModule: textPos == 20");
	textCpt->getToFlag = (uint16)textNo;
	return true;
}

bool Logic::fnTextKill2(uint32 a, uint32 b, uint32 c) {
	/// Kill all text items

	uint32 id = FIRST_TEXT_COMPACT;

	for (int i = 10; i > 0; i--) {
		Compact *cpt = _skyCompact->fetchCpt(id);
		cpt->status = 0;
		id++;
	}
	return true;
}

bool Logic::fnSetFont(uint32 font, uint32 b, uint32 c) {
	_skyText->fnSetFont(font);
	return true;
}

bool Logic::fnStartFx(uint32 sound, uint32 b, uint32 c) {
	_skySound->fnStartFx(sound, (uint8)(b & 1));
	return true;
}

bool Logic::fnStopFx(uint32 a, uint32 b, uint32 c) {
	_skySound->fnStopFx();
	return true;
}

bool Logic::fnStartMusic(uint32 a, uint32 b, uint32 c) {
	if (!(SkyEngine::_systemVars.systemFlags & SF_MUS_OFF))
		_skyMusic->startMusic((uint16)a);
	SkyEngine::_systemVars.currentMusic = (uint16)a;
	return true;
}

bool Logic::fnStopMusic(uint32 a, uint32 b, uint32 c) {
	_skyMusic->startMusic(0);
	SkyEngine::_systemVars.currentMusic = 0;
	return true;
}

bool Logic::fnFadeDown(uint32 a, uint32 b, uint32 c) {
	_skyScreen->fnFadeDown(a);
	return true;
}

bool Logic::fnFadeUp(uint32 a, uint32 b, uint32 c) {
	SkyEngine::_systemVars.currentPalette = a;
	_skyScreen->fnFadeUp(a,b);
	return true;
}

bool Logic::fnQuitToDos(uint32 a, uint32 b, uint32 c) {
	SkyEngine::_systemVars.quitGame = true;
	return false;
}

bool Logic::fnPauseFx(uint32 a, uint32 b, uint32 c) {
	_skySound->fnPauseFx();
	return true;
}

bool Logic::fnUnPauseFx(uint32 a, uint32 b, uint32 c) {
	_skySound->fnUnPauseFx();
	return true;
}

bool Logic::fnPrintf(uint32 a, uint32 b, uint32 c) {
	printf("fnPrintf: %d\n", a);
	return true;
}

void Logic::stdSpeak(Compact *target, uint32 textNum, uint32 animNum, uint32 base) {

	animNum += target->megaSet / NEXT_MEGA_SET;
	animNum &= 0xFF;

	uint16 *talkTable = (uint16*)_skyCompact->fetchCpt(CPT_TALK_TABLE_LIST);
	target->grafixProgId = talkTable[animNum];
	target->grafixProgPos = 0;
	uint16 *animPtr = _skyCompact->getGrafixPtr(target);

	if (animPtr) {
		target->offset = *animPtr++;
		target->getToFlag = *animPtr++;
		target->grafixProgPos += 2;
	} else
		target->grafixProgId = 0;

	bool speechFileFound = false;
	if (SkyEngine::isCDVersion())
		speechFileFound = _skySound->startSpeech((uint16)textNum);


	// Set the focus region to that area
	// Calculate the point where the character is
	int x = target->xcood - TOP_LEFT_X;
	int y = target->ycood - TOP_LEFT_Y;
	// TODO: Make the box size change based on the object that has the focus
	_skyScreen->setFocusRectangle(Common::Rect::center(x, y, 192, 128));


	if ((SkyEngine::_systemVars.systemFlags & SF_ALLOW_TEXT) || !speechFileFound) {
		// form the text sprite, if player wants subtitles or
		// if we couldn't find the speech file
		struct lowTextManager_t textInfo;
		textInfo = _skyText->lowTextManager(textNum, FIXED_TEXT_WIDTH, 0, (uint8)target->spColour, true);
		Compact *textCompact = _skyCompact->fetchCpt(textInfo.compactNum);
		target->spTextId = textInfo.compactNum;	//So we know what text to kill
		byte *textGfx = textInfo.textData;

		textCompact->screen = target->screen;	//put it on our screen

		if (_scriptVariables[SCREEN] == target->screen) { // Only use coordinates if we are on the current screen
			//talking on-screen
			//create the x coordinate for the speech text
			//we need the talkers sprite information
			byte *targetGfx = (byte *)SkyEngine::fetchItem(target->frame >> 6);
			uint16 xPos = target->xcood + ((struct dataFileHeader *)targetGfx)->s_offset_x;
			uint16 width = (((struct dataFileHeader *)targetGfx)->s_width >> 1);

			xPos += width - (FIXED_TEXT_WIDTH / 2);	//middle of talker

			if (xPos < TOP_LEFT_X)
				xPos = TOP_LEFT_X;

			width = xPos + FIXED_TEXT_WIDTH;
			if ((TOP_LEFT_X + FULL_SCREEN_WIDTH) <= width) {
				xPos = TOP_LEFT_X + FULL_SCREEN_WIDTH;
				xPos -= FIXED_TEXT_WIDTH;
			}

			textCompact->xcood = xPos;
			uint16 yPos = target->ycood + ((struct dataFileHeader *)targetGfx)->s_offset_y - 6 - ((struct dataFileHeader *)textGfx)->s_height;

			if (yPos < TOP_LEFT_Y)
				yPos = TOP_LEFT_Y;

			textCompact->ycood = yPos;

		} else {
			//talking off-screen
			target->spTextId = 0; 	//don't kill any text 'cos none was made
			textCompact->status = 0;	//don't display text
		}
		// In CD version, we're doing the timing by checking when the VOC has stopped playing.
		// Setting spTime to 10 thus means that we're doing a pause of 10 gamecycles between
		// each sentence.
		if (speechFileFound)
			target->spTime = 10;
		else
			target->spTime = (uint16)_skyText->_numLetters + 5;
	} else {
		target->spTime = 10;
		target->spTextId = 0;
	}
	target->logic = L_TALK;
}

} // End of namespace Sky