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RACE/race-memory.h

465 lines
12 KiB
C
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/*---------------------------------------------------------------------------
* 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. See also the license.txt file for
* additional informations.
*---------------------------------------------------------------------------
*/
#ifndef _MEMORYH_
#define _MEMORYH_
#include <retro_inline.h>
#include "types.h"
#include "neopopsound.h"
#include "sound.h"
#include "input.h"
#include "graphics.h"
#include "main.h"
#include "flash.h"
#ifdef DRZ80
#include "DrZ80_support.h"
#else
#ifdef CZ80
#include "cz80_support.h"
#else
#include "z80.h"
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Maximum ROM size is 4 megabytes */
#define MAINROM_SIZE_MAX (4*1024*1024)
extern unsigned char mainram[]; /* All RAM areas */
extern unsigned char mainrom[]; /* ROM image area */
extern unsigned char cpurom[]; /* Bios ROM image area */
#if 0
extern unsigned int cartAddrMask; /* Mask for reading/writing mainrom */
#endif
/* tlcs 900h memory */
#if 0
extern unsigned char cpuram[]; /* 900h cpu core needs this.. */
#endif
extern unsigned char *cpuram;
void mem_init(void);
#if 0
unsigned char *get_address(unsigned int addr);
unsigned char *get_addressW(unsigned int addr);
#endif
/* gameboy memory */
extern unsigned char (*gbMemReadB)(unsigned short addr);
extern void (*gbMemWriteB)(unsigned short addr, unsigned char data);
unsigned short gbMemReadW(unsigned short addr);
void gbMemWriteW(unsigned short addr, unsigned short data);
/* z80 memory functions */
extern unsigned char (*z80MemReadB)(unsigned short addr);
extern unsigned short (*z80MemReadW)(unsigned short addr);
extern void (*z80MemWriteB)(unsigned short addr, unsigned char data);
extern void (*z80MemWriteW)(unsigned short addr, unsigned short data);
extern void (*z80PortWriteB)(unsigned char port, unsigned char data);
extern unsigned char (*z80PortReadB)(unsigned char port);
#if defined(DRZ80) || defined(CZ80)
unsigned char z80ngpMemReadB(unsigned short addr);
unsigned short z80ngpMemReadW(unsigned short addr);
void DrZ80ngpMemWriteB(unsigned char data, unsigned short addr);
void DrZ80ngpMemWriteW(unsigned short data, unsigned short addr);
void DrZ80ngpPortWriteB(unsigned short port, unsigned char data);
unsigned char DrZ80ngpPortReadB(unsigned short port);
#endif
/* used internally by z80 emulation for emulation of the memory
* map of the Game Gear */
extern unsigned char *ggVRAM;
extern unsigned char *ggCRAM;
unsigned char z80ggMemReadB(unsigned short addr);
unsigned short z80ggMemReadW(unsigned short addr);
void z80ggMemWriteB(unsigned short addr, unsigned char data);
void z80ggMemWriteW(unsigned short addr, unsigned short data);
void z80ggPortWriteB(unsigned char port, unsigned char data);
unsigned char z80ggPortReadB(unsigned char port);
/* definitions for wdc6502 emulation */
extern unsigned char (*w65MemReadB)(unsigned short addr);
#if 0
extern unsigned short (*w65MemReadW)(unsigned short addr);
extern void (*w65MemWriteW)(unsigned short addr, unsigned short data);
#endif
unsigned short w65MemReadW(unsigned short addr);
extern void (*w65MemWriteB)(unsigned short addr, unsigned char data);
void w65MemWriteW(unsigned short addr, unsigned short data);
extern unsigned char *w65GetAddress(unsigned short addr);
//
// Supervision specific
//
extern unsigned char *svVRAM;
//
// HuC specific defines & externs
//
extern unsigned char hucMMR[8];
/*
* i8086 functions
*/
extern unsigned char *x86Ports;
unsigned char x86MemReadB(unsigned int addr);
void x86MemWriteB(unsigned int addr, unsigned char data);
unsigned short x86MemReadW(unsigned int addr);
void x86MemWriteW(unsigned int addr, unsigned short data);
unsigned char x86PortReadB(unsigned short port);
void x86PortWriteB(unsigned short port, unsigned char data);
unsigned short x86PortReadW(unsigned short port);
void x86PortWriteW(unsigned short port, unsigned short data);
/* used for Wonderswan graphics emulation */
extern unsigned char *wsTileMap0;
extern unsigned char *wsTileMap1;
extern unsigned char *wsPatterns;
extern unsigned char *wsSpriteTable;
/*
* i8048 functions
*/
extern unsigned char *advBios;
extern unsigned char *advVidRAM;
unsigned char i8048ROMReadB(unsigned int addr);
unsigned char i8048ExtReadB(unsigned int addr);
void i8048ExtWriteB(unsigned int addr, unsigned char data);
unsigned char i8048PortReadB(unsigned char port);
void i8048PortWriteB(unsigned char port, unsigned char data);
void i8048SetT1(void);
unsigned char i8048GetT1(void);
/*
* sm85xx memory functions
*/
extern unsigned char (*sm85MemReadB)(unsigned short addr);
extern void (*sm85MemWriteB)(unsigned short addr, unsigned char data);
extern unsigned char realBIOSloaded;
static INLINE unsigned char *get_address(unsigned int addr)
{
addr&= 0x00FFFFFF;
if (addr<0x00200000)
{
if (addr<0x000008a0)
{
#if 0
if(((unsigned int)&cpuram[addr] >> 24) == 0xFF)
dbg_print("1) addr=0x%X returning=0x%X\n", addr, &cpuram[addr]);
#endif
return &cpuram[addr];
}
if (addr>0x00003fff && addr<0x00018000)
{
#if 0
if((unsigned int)&mainram[addr-0x00004000] >> 24 == 0xFF)
dbg_print("2) addr=0x%X returning=0x%X\n", addr, &mainram[addr-0x00004000]);
#endif
switch (addr) /* Thanks Koyote */
{
case 0x6F80:
mainram[addr-0x00004000] = 0xFF;
break;
case 0x6F80+1:
mainram[addr-0x00004000] = 0x03;
break;
case 0x6F85:
mainram[addr-0x00004000] = 0x00;
break;
case 0x6F82:
mainram[addr-0x00004000] = ngpInputState;
break;
case 0x6DA2:
mainram[addr-0x00004000] = 0x80;
break;
}
return &mainram[addr-0x00004000];
}
}
else
{
if (addr<0x00400000)
{
return &mainrom[(addr-0x00200000) /*&cartAddrMask*/];
}
if(addr<0x00800000) /* Flavor added */
{
return 0;
}
if (addr<0x00A00000)
{
return &mainrom[(addr-(0x00800000-0x00200000))/*&cartAddrMask*/];
}
if(addr<0x00FF0000) /* Flavor added */
{
return 0;
}
#if 0
if((unsigned int)&cpurom[addr-0x00ff0000] >> 24 == 0xFF)
dbg_print("5) addr=0x%X returning=0x%X\n", addr, &cpurom[addr-0x00ff0000]);
#endif
return &cpurom[addr-0x00ff0000];
}
#if 0
dbg_print("6) addr=0x%X returning=0\n", addr);
#endif
return 0; /* Flavor ERROR */
}
/* read a byte from a memory address (addr) */
static INLINE unsigned char tlcsMemReadB(unsigned int addr)
{
addr&= 0x00FFFFFF;
if(currentCommand == COMMAND_INFO_READ)
return flashReadInfo(addr);
if (addr < 0x00200000) {
if (addr < 0x000008A0) {
if(addr == 0xBC)
{
ngpSoundExecute();
}
return cpuram[addr];
}
else if (addr > 0x00003FFF && addr < 0x00018000)
{
switch (addr) /* Thanks Koyote */
{
case 0x6DA2:
return 0x80;
break;
case 0x6F80:
return 0xFF;
break;
case 0x6F80+1:
return 0x03;
break;
case 0x6F85:
return 0x00;
break;
case 0x6F82:
return ngpInputState;
break;
default:
return mainram[addr-0x00004000];
}
return mainram[addr-0x00004000];
}
}
else
{
if (addr<0x00400000)
return mainrom[(addr-0x00200000)/*&cartAddrMask*/];
if (addr<0x00800000)
return 0xFF;
if (addr<0x00a00000)
return mainrom[(addr-(0x00800000-0x00200000))/*&cartAddrMask*/];
if (addr<0x00ff0000)
return 0xFF;
return cpurom[addr-0x00ff0000];
}
return 0xFF;
}
/* read a word from a memory address (addr) */
static INLINE unsigned short tlcsMemReadW(unsigned int addr)
{
#ifdef TARGET_GP2X
register unsigned short i asm("r0");
register unsigned char *gA asm("r1");
gA = get_address(addr);
if(gA == 0)
return 0;
asm volatile(
"ldrb %0, [%1]\n\t"
"ldrb r2, [%1, #1]\n\t"
"orr %0, %0, r2, asl #8"
: "=r" (i)
: "r" (gA)
: "r2");
return i;
#else
/* unsigned short i;
unsigned char *gA = get_address(addr);
if(gA == 0)
return 0;
i = *(gA++);
i |= (*gA) << 8;
return i;
*/
return tlcsMemReadB(addr) | (tlcsMemReadB(addr+1) << 8);
#endif
}
/* read a long word from a memory address (addr) */
static INLINE unsigned int tlcsMemReadL(unsigned int addr)
{
#ifdef TARGET_GP2X
register unsigned int i asm("r0");
register unsigned char *gA asm("r4");
gA = get_address(addr);
if(gA == 0)
return 0;
asm volatile(
"bic r1,%1,#3 \n"
"ldmia r1,{r0,r3} \n"
"ands r1,%1,#3 \n"
"movne r2,r1,lsl #3 \n"
"movne r0,r0,lsr r2 \n"
"rsbne r1,r2,#32 \n"
"orrne r0,r0,r3,lsl r1"
: "=r"(i)
: "r"(gA)
: "r1","r2","r3");
return i;
#else
unsigned int i;
unsigned char *gA = get_address(addr);
if(gA == 0)
return 0;
i = *(gA++);
i |= (*(gA++)) << 8;
i |= (*(gA++)) << 16;
i |= (unsigned int)(*gA) << 24;
#if 0
return tlcsMemReadB(addr) | (tlcsMemReadB(addr +1) << 8) | (tlcsMemReadB(addr +2) << 16) | (tlcsMemReadB(addr +3) << 24);
#else
return i;
#endif
#endif
}
/* write a byte (data) to a memory address (addr) */
static INLINE void tlcsMemWriteB(unsigned int addr, unsigned char data)
{
addr&= 0x00FFFFFF;
if (addr<0x000008a0)
{
switch(addr) {
#if 0
case 0x80: /* CPU speed */
break;
#endif
case 0xA0: /* L CH Sound Source Control Register */
if (cpuram[0xB8] == 0x55 && cpuram[0xB9] == 0xAA)
Write_SoundChipNoise(data);/*Flavor SN76496Write(0, data); */
break;
case 0xA1: /* R CH Sound Source Control Register */
if (cpuram[0xB8] == 0x55 && cpuram[0xB9] == 0xAA)
Write_SoundChipTone(data); /*Flavor SN76496Write(0, data); */
break;
case 0xA2: /* L CH DAC Control Register */
ngpSoundExecute();
if (cpuram[0xB8] == 0xAA)
dac_writeL(data); /*Flavor DAC_data_w(0,data); */
break;
#if 0
case 0xA3: /* R CH DAC Control Register */ /* Flavor hack for mono only sound */
ngpSoundExecute();
if (cpuram[0xB8] == 0xAA)
dac_writeR(data); /* Flavor DAC_data_w(1,data); */
break;
#endif
case 0xB8: /* Z80 Reset */
#if 0
if (data == 0x55) DAC_data_w(0,0);
#endif
case 0xB9: /* Sourd Source Reset Control Register */
switch(data)
{
case 0x55:
ngpSoundStart();
break;
case 0xAA:
ngpSoundExecute();
ngpSoundOff();
break;
}
break;
case 0xBA:
ngpSoundExecute();
#if defined(DRZ80) || defined(CZ80)
Z80_Cause_Interrupt(Z80_NMI_INT);
#else
z80Interrupt(Z80NMI);
#endif
break;
}
cpuram[addr] = data;
return;
}
else if (addr>0x00003fff && addr<0x00018000)
{
if (addr == 0x87E2 && mainram[0x47F0] != 0xAA)
return; /* disallow writes to GEMODE */
#if 0
if((addr >= 0x8800 && addr <= 0x88FF)
|| (addr >= 0x8C00 && addr <= 0x8FFF)
|| (addr >= 0xA000 && addr <= 0xBFFF)
|| addr == 0x00008020
|| addr == 0x00008021)
spritesDirty = true;
#endif
mainram[addr-0x00004000] = data;
return;
}
else if (addr>=0x00200000 && addr<0x00400000)
flashChipWrite(addr, data);
else if (addr>=0x00800000 && addr<0x00A00000)
flashChipWrite(addr, data);
}
#ifdef __cplusplus
}
#endif
#endif /* _MEMORYH_ */
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