// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Carwin Jones (BeOS)
// Cleanups and endian wrongness amelioration by James L. Hammons
// Note: Endian wrongness probably stems from the MAME origins of this emu and
-// the braindead way in which MAME handles memory. :-)
+// the braindead way in which MAME handled memory when this was written. :-)
+//
+// JLH = James L. Hammons
+//
+// WHO WHEN WHAT
+// --- ---------- -----------------------------------------------------------
+// JLH 11/25/2009 Major rewrite of memory subsystem and handlers
//
#include "jaguar.h"
#include <SDL.h>
#include "SDL_opengl.h"
+#include "blitter.h"
#include "cdrom.h"
+#include "dac.h"
#include "dsp.h"
+#include "eeprom.h"
#include "event.h"
#include "gpu.h"
-#include "gui.h"
+//#include "gui.h"
#include "jerry.h"
#include "joystick.h"
#include "log.h"
#include "m68k.h"
-#include "memory.h"
+//#include "memory.h"
+#include "mmu.h"
#include "settings.h"
#include "tom.h"
#include "video.h"
-#include "blitter.h"
-#include "jerry.h"
-#include "dac.h"
-#include "eeprom.h"
#define CPU_DEBUG
//Do this in makefile??? Yes! Could, but it's easier to define here...
extern int effect_start2, effect_start3, effect_start4, effect_start5, effect_start6;
#endif
-// Memory debugging identifiers
-
-const char * whoName[9] =
- { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
-
uint32 jaguar_active_memory_dumps = 0;
uint32 jaguarMainROMCRC32, jaguarROMSize, jaguarRunAddress;
-uint8 jaguarMainRAM[0x400000]; // 68K CPU RAM
-uint8 jaguarMainROM[0x600000]; // 68K CPU ROM
-uint8 jaguarBootROM[0x040000]; // 68K CPU BIOS ROM--uses only half of this!
-uint8 jaguarCDBootROM[0x040000]; // 68K CPU CD BIOS ROM
bool BIOSLoaded = false;
bool CDBIOSLoaded = false;
-//uint8 cdRAM[0x100];
-uint8 * cdRAM = &jaguarMainROM[0x5FFF00];
-uint8 tomRAM[0x4000];
-uint8 jerryRAM[0x10000];
-
#ifdef CPU_DEBUG_MEMORY
uint8 writeMemMax[0x400000], writeMemMin[0x400000];
uint8 readMem[0x400000];
*/
#endif
-#define EXPERIMENTAL_MEMORY_HANDLING
+//#define EXPERIMENTAL_MEMORY_HANDLING
// Experimental memory mappage...
// Dunno if this is a good approach or not, but it seems to make better
// sense to have all this crap in one spot intstead of scattered all over
return vector;
}
+//#define USE_NEW_MMU
+
unsigned int m68k_read_memory_8(unsigned int address)
{
#ifdef CPU_DEBUG_MEMORY
/* if (address == 0x51136 || address == 0x51138 || address == 0xFB074 || address == 0xFB076
|| address == 0x1AF05E)
WriteLog("[RM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, jaguar_mainRam[address]);//*/
+#ifndef USE_NEW_MMU
unsigned int retVal = 0;
if ((address >= 0x000000) && (address <= 0x3FFFFF))
- retVal = jaguarMainRam[address];
+ retVal = jaguarMainRAM[address];
// else if ((address >= 0x800000) && (address <= 0xDFFFFF))
else if ((address >= 0x800000) && (address <= 0xDFFEFF))
- retVal = jaguarMainRom[address - 0x800000];
+ retVal = jaguarMainROM[address - 0x800000];
else if ((address >= 0xE00000) && (address <= 0xE3FFFF))
- retVal = jaguarBootRom[address - 0xE00000];
+ retVal = jaguarBootROM[address - 0xE00000];
else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
retVal = CDROMReadByte(address);
else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
//if (address >= 0x8B5E4 && address <= 0x8B5E4 + 16)
// WriteLog("M68K: Read byte $%02X at $%08X [PC=%08X]\n", retVal, address, m68k_get_reg(NULL, M68K_REG_PC));
return retVal;
+#else
+ return MMURead8(address, M68K);
+#endif
}
void gpu_dump_disassembly(void);
/* if (address == 0x51136 || address == 0x51138 || address == 0xFB074 || address == 0xFB076
|| address == 0x1AF05E)
WriteLog("[RM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, GET16(jaguar_mainRam, address));//*/
+#ifndef USE_NEW_MMU
unsigned int retVal = 0;
if ((address >= 0x000000) && (address <= 0x3FFFFE))
// retVal = (jaguar_mainRam[address] << 8) | jaguar_mainRam[address+1];
- retVal = GET16(jaguarMainRam, address);
+ retVal = GET16(jaguarMainRAM, address);
// else if ((address >= 0x800000) && (address <= 0xDFFFFE))
else if ((address >= 0x800000) && (address <= 0xDFFEFE))
- retVal = (jaguarMainRom[address - 0x800000] << 8) | jaguarMainRom[address - 0x800000 + 1];
+ retVal = (jaguarMainROM[address - 0x800000] << 8) | jaguarMainROM[address - 0x800000 + 1];
else if ((address >= 0xE00000) && (address <= 0xE3FFFE))
- retVal = (jaguarBootRom[address - 0xE00000] << 8) | jaguarBootRom[address - 0xE00000 + 1];
+ retVal = (jaguarBootROM[address - 0xE00000] << 8) | jaguarBootROM[address - 0xE00000 + 1];
else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
retVal = CDROMReadWord(address, M68K);
else if ((address >= 0xF00000) && (address <= 0xF0FFFE))
//if (address >= 0x8B5E4 && address <= 0x8B5E4 + 16)
// WriteLog("M68K: Read word $%04X at $%08X [PC=%08X]\n", retVal, address, m68k_get_reg(NULL, M68K_REG_PC));
return retVal;
+#else
+ return MMURead16(address, M68K);
+#endif
}
unsigned int m68k_read_memory_32(unsigned int address)
WriteLog("[RM32 PC=%08X] Addr: %08X, val: %08X\n", m68k_get_reg(NULL, M68K_REG_PC), address, (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2));//*/
//WriteLog("--> [RM32]\n");
+#ifndef USE_NEW_MMU
return (m68k_read_memory_16(address) << 16) | m68k_read_memory_16(address + 2);
+#else
+ return MMURead32(address, M68K);
+#endif
}
void m68k_write_memory_8(unsigned int address, unsigned int value)
if (address >= 0x18FA70 && address < (0x18FA70 + 8000))
WriteLog("M68K: Byte %02X written at %08X by 68K\n", value, address);//*/
+#ifndef USE_NEW_MMU
if ((address >= 0x000000) && (address <= 0x3FFFFF))
- jaguarMainRam[address] = value;
+ jaguarMainRAM[address] = value;
else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF))
CDROMWriteByte(address, value, M68K);
else if ((address >= 0xF00000) && (address <= 0xF0FFFF))
JERRYWriteByte(address, value, M68K);
else
jaguar_unknown_writebyte(address, value, M68K);
+#else
+ MMUWrite8(address, value, M68K);
+#endif
}
void m68k_write_memory_16(unsigned int address, unsigned int value)
|| address == 0x1AF05E)
WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);//*/
+#ifndef USE_NEW_MMU
if ((address >= 0x000000) && (address <= 0x3FFFFE))
{
/* jaguar_mainRam[address] = value >> 8;
jaguar_mainRam[address + 1] = value & 0xFF;*/
- SET16(jaguarMainRam, address, value);
+ SET16(jaguarMainRAM, address, value);
}
else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE))
CDROMWriteWord(address, value, M68K);
m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
#endif
}
+#else
+ MMUWrite16(address, value, M68K);
+#endif
}
void m68k_write_memory_32(unsigned int address, unsigned int value)
/* if (address == 0x51136 || address == 0xFB074)
WriteLog("[WM32 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);//*/
+#ifndef USE_NEW_MMU
m68k_write_memory_16(address, value >> 16);
m68k_write_memory_16(address + 2, value & 0xFFFF);
+#else
+ MMUWrite32(address, value, M68K);
+#endif
}
offset &= 0xFFFFFF;
if (offset < 0x400000)
- data = jaguarMainRam[offset & 0x3FFFFF];
+ data = jaguarMainRAM[offset & 0x3FFFFF];
else if ((offset >= 0x800000) && (offset < 0xC00000))
- data = jaguarMainRom[offset - 0x800000];
+ data = jaguarMainROM[offset - 0x800000];
else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
data = CDROMReadByte(offset, who);
else if ((offset >= 0xE00000) && (offset < 0xE40000))
- data = jaguarBootRom[offset & 0x3FFFF];
+ data = jaguarBootROM[offset & 0x3FFFF];
else if ((offset >= 0xF00000) && (offset < 0xF10000))
data = TOMReadByte(offset, who);
else if ((offset >= 0xF10000) && (offset < 0xF20000))
offset &= 0xFFFFFF;
if (offset <= 0x3FFFFE)
{
- return (jaguarMainRam[(offset+0) & 0x3FFFFF] << 8) | jaguarMainRam[(offset+1) & 0x3FFFFF];
+ return (jaguarMainRAM[(offset+0) & 0x3FFFFF] << 8) | jaguarMainRAM[(offset+1) & 0x3FFFFF];
}
else if ((offset >= 0x800000) && (offset <= 0xBFFFFE))
{
offset -= 0x800000;
- return (jaguarMainRom[offset+0] << 8) | jaguarMainRom[offset+1];
+ return (jaguarMainROM[offset+0] << 8) | jaguarMainROM[offset+1];
}
// else if ((offset >= 0xDFFF00) && (offset < 0xDFFF00))
else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFE))
return CDROMReadWord(offset, who);
else if ((offset >= 0xE00000) && (offset <= 0xE3FFFE))
- return (jaguarBootRom[(offset+0) & 0x3FFFF] << 8) | jaguarBootRom[(offset+1) & 0x3FFFF];
+ return (jaguarBootROM[(offset+0) & 0x3FFFF] << 8) | jaguarBootROM[(offset+1) & 0x3FFFF];
else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE))
return TOMReadWord(offset, who);
else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE))
offset &= 0xFFFFFF;
if (offset < 0x400000)
{
- jaguarMainRam[offset & 0x3FFFFF] = data;
+ jaguarMainRAM[offset & 0x3FFFFF] = data;
return;
}
else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF))
if (offset == 0x11D31A + 0x48000 || offset == 0x11D31A)
WriteLog("JWW: %s writing star %04X at %08X...\n", whoName[who], data, offset);//*/
- jaguarMainRam[(offset+0) & 0x3FFFFF] = data >> 8;
- jaguarMainRam[(offset+1) & 0x3FFFFF] = data & 0xFF;
+ jaguarMainRAM[(offset+0) & 0x3FFFFF] = data >> 8;
+ jaguarMainRAM[(offset+1) & 0x3FFFFF] = data & 0xFF;
return;
}
else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE)
memset(writeMemMin, 0xFF, 0x400000);
memset(writeMemMax, 0x00, 0x400000);
#endif
- memset(jaguarMainRam, 0x00, 0x400000);
+ memset(jaguarMainRAM, 0x00, 0x400000);
// memset(jaguar_mainRom, 0xFF, 0x200000); // & set it to all Fs...
// memset(jaguar_mainRom, 0x00, 0x200000); // & set it to all 0s...
//NOTE: This *doesn't* fix FlipOut...
//Or does it? Hmm...
//Seems to want $01010101... Dunno why. Investigate!
- memset(jaguarMainRom, 0x01, 0x600000); // & set it to all 01s...
+ memset(jaguarMainROM, 0x01, 0x600000); // & set it to all 01s...
// memset(jaguar_mainRom, 0xFF, 0x600000); // & set it to all Fs...
m68k_set_cpu_type(M68K_CPU_TYPE_68000);
{
//NOTE: This causes a (virtual) crash if this is set in the config but not found... !!! FIX !!!
if (vjs.useJaguarBIOS)
- memcpy(jaguarMainRam, jaguarBootRom, 8);
+ memcpy(jaguarMainRAM, jaguarBootROM, 8);
else
- SET32(jaguarMainRam, 4, jaguarRunAddress);
+ SET32(jaguarMainRAM, 4, jaguarRunAddress);
// WriteLog("jaguar_reset():\n");
TOMReset();
if (fp == NULL)
return;
- fwrite(jaguarMainRam, 1, 0x400000, fp);
+ fwrite(jaguarMainRAM, 1, 0x400000, fp);
fclose(fp);
}
uint8 * GetRamPtr(void)
{
- return jaguarMainRam;
+ return jaguarMainRAM;
}
//
// if (vc == vbb)
{
JoystickExec();
- RenderBackbuffer();
+//We comment this out so that the GUI can manage this instead. Which is how it should be anyway.
+// RenderBackbuffer();
TOMResetBackbuffer(backbuffer);
frameDone = true;
}//*/
projects / virtualjaguar / blobdiff