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216 lines
6.0 KiB
C
216 lines
6.0 KiB
C
/*
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* DOS interrupt 16h handler
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*
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* Copyright 1998 Joseph Pranevich
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* Copyright 1999 Ove Kåven
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include "dosexe.h"
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#include "wincon.h"
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#include "wine/debug.h"
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#include "windef.h"
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#include "wingdi.h"
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#include "winuser.h"
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WINE_DEFAULT_DEBUG_CHANNEL(int);
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/**********************************************************************
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* DOSVM_Int16Handler (WINEDOS16.122)
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*
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* Handler for int 16h (keyboard)
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*
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* NOTE:
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*
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* KEYB.COM (DOS >3.2) adds functions to this interrupt, they are
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* not currently listed here.
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*/
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void WINAPI DOSVM_Int16Handler( CONTEXT86 *context )
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{
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BIOSDATA *data = NULL;
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BYTE ascii, scan;
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switch AH_reg(context) {
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case 0x00: /* Get Keystroke */
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/* Returns: AH = Scan code
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AL = ASCII character */
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TRACE("Get Keystroke\n");
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DOSVM_Int16ReadChar(&ascii, &scan, context);
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SET_AL( context, ascii );
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SET_AH( context, scan );
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break;
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case 0x01: /* Check for Keystroke */
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/* Returns: ZF set if no keystroke */
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/* AH = Scan code */
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/* AL = ASCII character */
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TRACE("Check for Keystroke\n");
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if (!DOSVM_Int16ReadChar(&ascii, &scan, NULL))
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{
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SET_ZFLAG(context);
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}
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else
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{
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SET_AL( context, ascii );
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SET_AH( context, scan );
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RESET_ZFLAG(context);
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}
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/* don't miss the opportunity to break some tight timing loop in DOS
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* programs causing 100% CPU usage (by doing a Sleep here) */
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Sleep(5);
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break;
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case 0x02: /* Get Shift Flags */
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/* read value from BIOS data segment's keyboard status flags field */
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data = DOSVM_BiosData();
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SET_AL( context, data->KbdFlags1 );
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TRACE("Get Shift Flags: returning 0x%02x\n", AL_reg(context));
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break;
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case 0x03: /* Set Typematic Rate and Delay */
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FIXME("Set Typematic Rate and Delay - Not Supported\n");
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break;
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case 0x05:/*simulate Keystroke*/
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FIXME("Simulating a keystroke is not supported yet\n");
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break;
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case 0x09: /* Get Keyboard Functionality */
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FIXME("Get Keyboard Functionality - Not Supported\n");
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/* As a temporary measure, say that "nothing" is supported... */
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SET_AL( context, 0 );
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break;
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case 0x0a: /* Get Keyboard ID */
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FIXME("Get Keyboard ID - Not Supported\n");
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break;
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case 0x10: /* Get Enhanced Keystroke */
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TRACE("Get Enhanced Keystroke - Partially supported\n");
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/* Returns: AH = Scan code
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AL = ASCII character */
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DOSVM_Int16ReadChar(&ascii, &scan, context);
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SET_AL( context, ascii );
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SET_AH( context, scan );
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break;
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case 0x11: /* Check for Enhanced Keystroke */
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/* Returns: ZF set if no keystroke */
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/* AH = Scan code */
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/* AL = ASCII character */
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TRACE("Check for Enhanced Keystroke - Partially supported\n");
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if (!DOSVM_Int16ReadChar(&ascii, &scan, NULL))
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{
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SET_ZFLAG(context);
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}
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else
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{
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SET_AL( context, ascii );
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SET_AH( context, scan );
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RESET_ZFLAG(context);
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}
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break;
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case 0x12: /* Get Extended Shift States */
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FIXME("Get Extended Shift States - Not Supported\n");
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break;
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default:
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FIXME("Unknown INT 16 function - 0x%x\n", AH_reg(context));
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break;
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}
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}
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/**********************************************************************
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* DOSVM_Int16ReadChar
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*
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* Either peek into keyboard buffer or wait for next keystroke.
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*
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* If waitctx is NULL, return TRUE if buffer had keystrokes and
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* FALSE if buffer is empty. Returned keystroke will be left into buffer.
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*
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* If waitctx is non-NULL, wait until keystrokes are available.
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* Return value will always be TRUE and returned keystroke will be
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* removed from buffer.
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*/
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int WINAPI DOSVM_Int16ReadChar(BYTE *ascii, BYTE *scan, CONTEXT86 *waitctx)
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{
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BIOSDATA *data = DOSVM_BiosData();
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WORD CurOfs = data->NextKbdCharPtr;
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/* check if there's data in buffer */
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if (waitctx)
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{
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/* wait until input is available... */
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while (CurOfs == data->FirstKbdCharPtr)
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DOSVM_Wait( waitctx );
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}
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else
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{
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if (CurOfs == data->FirstKbdCharPtr)
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return FALSE;
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}
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/* read from keyboard queue */
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TRACE( "(%p,%p,%p) -> %02x %02x\n", ascii, scan, waitctx,
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((BYTE*)data)[CurOfs], ((BYTE*)data)[CurOfs+1] );
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if (ascii) *ascii = ((BYTE*)data)[CurOfs];
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if (scan) *scan = ((BYTE*)data)[CurOfs+1];
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if (waitctx)
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{
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CurOfs += 2;
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if (CurOfs >= data->KbdBufferEnd) CurOfs = data->KbdBufferStart;
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data->NextKbdCharPtr = CurOfs;
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}
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return TRUE;
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}
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int WINAPI DOSVM_Int16AddChar(BYTE ascii,BYTE scan)
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{
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BIOSDATA *data = DOSVM_BiosData();
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WORD CurOfs = data->FirstKbdCharPtr;
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WORD NextOfs = CurOfs + 2;
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TRACE("(%02x,%02x)\n",ascii,scan);
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if (NextOfs >= data->KbdBufferEnd) NextOfs = data->KbdBufferStart;
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/* check if buffer is full */
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if (NextOfs == data->NextKbdCharPtr) return 0;
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/* okay, insert character in ring buffer */
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((BYTE*)data)[CurOfs] = ascii;
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((BYTE*)data)[CurOfs+1] = scan;
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data->FirstKbdCharPtr = NextOfs;
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return 1;
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}
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