//
// JAGUAR.CPP
//
-// by Cal2
-// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
+// Originally by David Raingeard (Cal2)
+// 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. :-)
#define CPU_DEBUG
//Do this in makefile??? Yes! Could, but it's easier to define here...
-#define LOG_UNMAPPED_MEMORY_ACCESSES
+//#define LOG_UNMAPPED_MEMORY_ACCESSES
+//#define ABORT_ON_UNMAPPED_MEMORY_ACCESS
#define CPU_DEBUG_MEMORY
// Private function prototypes
char * whoName[9] =
{ "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
-// These values are overridden by command line switches...
-
-//extern bool dsp_enabled;
-//extern bool jaguar_use_bios; // Default is now to USE the BIOS
uint32 jaguar_active_memory_dumps = 0;
-uint32 jaguar_mainRom_crc32;
+uint32 jaguar_mainRom_crc32, jaguarRomSize, jaguarRunAddress;
/*static*/ uint8 * jaguar_mainRam = NULL;
/*static*/ uint8 * jaguar_bootRom = NULL;
/*static*/ uint8 * jaguar_mainRom = NULL;
+
#ifdef CPU_DEBUG_MEMORY
uint8 writeMemMax[0x400000], writeMemMin[0x400000];
uint8 readMem[0x400000];
uint32 returnAddr[4000], raPtr = 0xFFFFFFFF;
#endif
+uint32 pcQueue[0x400];
+uint32 pcQPtr = 0;
+
//
// Callback function to detect illegal instructions
//
void M68KInstructionHook(void)
{
uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC);
+
+// For tracebacks...
+// Ideally, we'd save all the registers as well...
+ pcQueue[pcQPtr++] = m68kPC;
+ pcQPtr &= 0x3FF;
+
+ if (m68kPC & 0x01) // Oops! We're fetching an odd address!
+ {
+ WriteLog("M68K: Attempted to execute from an odd adress!\n\nBacktrace:\n\n");
+
+ static char buffer[2048];
+ for(int i=0; i<0x400; i++)
+ {
+ m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], M68K_CPU_TYPE_68000);
+ WriteLog("\t%08X: %s\n", pcQueue[(pcQPtr + i) & 0x3FF], buffer);
+ }
+ WriteLog("\n");
+
+ uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7);
+ WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack));
+ for(int i=0; i<10; i++)
+ WriteLog("%06X: %08X\n", topOfStack - (i * 4), JaguarReadLong(topOfStack - (i * 4)));
+ WriteLog("Jaguar: VBL interrupt is %s\n", ((tom_irq_enabled(IRQ_VBLANK)) && (jaguar_interrupt_handler_is_valid(64))) ? "enabled" : "disabled");
+ M68K_show_context();
+ log_done();
+ exit(0);
+ }
+
/* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB)
{
static char buffer[2048];
else
{
jaguar_unknown_writeword(address, value, M68K);
+#ifdef LOG_UNMAPPED_MEMORY_ACCESSES
WriteLog("\tA0=%08X, A1=%08X, D0=%08X, D1=%08X\n",
m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1),
m68k_get_reg(NULL, M68K_REG_D0), m68k_get_reg(NULL, M68K_REG_D1));
+#endif
}
}
{
#ifdef LOG_UNMAPPED_MEMORY_ACCESSES
WriteLog("Jaguar: Unknown byte %02X written at %08X by %s (M68K PC=%06X)\n", data, address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
+#endif
+#ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
extern bool finished;
finished = true;
extern bool doDSPDis;
{
#ifdef LOG_UNMAPPED_MEMORY_ACCESSES
WriteLog("Jaguar: Unknown word %04X written at %08X by %s (M68K PC=%06X)\n", data, address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
+#endif
+#ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
extern bool finished;
finished = true;
extern bool doDSPDis;
{
#ifdef LOG_UNMAPPED_MEMORY_ACCESSES
WriteLog("Jaguar: Unknown byte read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
+#endif
+#ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
extern bool finished;
finished = true;
extern bool doDSPDis;
{
#ifdef LOG_UNMAPPED_MEMORY_ACCESSES
WriteLog("Jaguar: Unknown word read at %08X by %s (M68K PC=%06X)\n", address, whoName[who], m68k_get_reg(NULL, M68K_REG_PC));
+#endif
+#ifdef ABORT_ON_UNMAPPED_MEMORY_ACCESS
extern bool finished;
finished = true;
extern bool doDSPDis;
// We really should re-do this so that it does *real* 32-bit access... !!! FIX !!!
void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/)
{
+/* extern bool doDSPDis;
+ if (offset < 0x400 && !doDSPDis)
+ {
+ WriteLog("JLW: Write to %08X by %s... Starting DSP log!\n\n", offset, whoName[who]);
+ doDSPDis = true;
+ }//*/
+
JaguarWriteWord(offset, data >> 16, who);
JaguarWriteWord(offset+2, data & 0xFFFF, who);
}
memcpy(jaguar_mainRam, jaguar_bootRom, 8);
else
{
- SET32(jaguar_mainRam, 4, 0x00802000);
+// Should also make a run address global as well, for when we reset the jag (PD mainly)
+/* SET32(jaguar_mainRam, 4, 0x00802000);
// Handle PD stuff...
// This should definitely go elsewhere (like in the cart load section)!
+//NOTE: The bytes 'JAGR' should also be at position $1C...
if (jaguar_mainRom[0] == 0x60 && jaguar_mainRom[1] == 0x1A)
{
- uint32 runAddress = GET32(jaguar_mainRom, 0x2A);
- uint32 progLength = GET32(jaguar_mainRom, 0x02);
- WriteLog("Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
- memcpy(jaguar_mainRam + runAddress, jaguar_mainRom + 0x2E, progLength);
+ uint32 loadAddress = GET32(jaguar_mainRom, 0x22), runAddress = GET32(jaguar_mainRom, 0x2A);
+//This is not always right! Especially when converted via bin2jag1!!!
+//We should have access to the length of the furshlumiger file that was loaded anyway!
+//Now, we do! ;-)
+// uint32 progLength = GET32(jaguar_mainRom, 0x02);
+//jaguarRomSize
+//jaguarRunAddress
+// WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, progLength);
+// memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, progLength);
+ WriteLog("Jaguar: Setting up PD ROM... Run address: %08X, length: %08X\n", runAddress, jaguarRomSize - 0x2E);
+ memcpy(jaguar_mainRam + loadAddress, jaguar_mainRom + 0x2E, jaguarRomSize - 0x2E);
SET32(jaguar_mainRam, 4, runAddress);
- }
+ }//*/
+ SET32(jaguar_mainRam, 4, jaguarRunAddress);
}
// WriteLog("jaguar_reset():\n");
WriteLog("JagExe: VP=%u, VI=%u, VDB=%u, VBB=%u CPU CPS=%u, GPU CPS=%u\n", vp, vi, vdb, vbb, M68KCyclesPerScanline, RISCCyclesPerScanline);
}//*/
+//extern int start_logging;
for(uint16 i=0; i<vp; i++)
{
// Increment the horizontal count (why? RNG?)
m68k_set_irq(7);
}
}
-
+
// uint32 invalid_instruction_address = s68000exec(M68KCyclesPerScanline);
// if (invalid_instruction_address != 0x80000000)
// cd_bios_process(invalid_instruction_address);
+//if (start_logging)
+// WriteLog("About to execute M68K (%u)...\n", i);
m68k_execute(M68KCyclesPerScanline);
// No CD handling... !!! FIX !!!
+//if (start_logging)
+// WriteLog("About to execute CD BIOS (%u)...\n", i);
cd_bios_exec(i); // NOTE: Ignores parameter...
+//if (start_logging)
+// WriteLog("About to execute TOM's PIT (%u)...\n", i);
TOMExecPIT(RISCCyclesPerScanline);
+//if (start_logging)
+// WriteLog("About to execute JERRY's PIT (%u)...\n", i);
jerry_pit_exec(RISCCyclesPerScanline);
+//if (start_logging)
+// WriteLog("About to execute JERRY's SSI (%u)...\n", i);
jerry_i2s_exec(RISCCyclesPerScanline);
+//if (start_logging)
+// WriteLog("About to execute GPU (%u)...\n", i);
gpu_exec(RISCCyclesPerScanline);
if (vjs.DSPEnabled)
-// DSPExec(RISCCyclesPerScanline);
-// Do pipelined DSP execution...
- DSPExecP3(RISCCyclesPerScanline);
-
+ if (vjs.usePipelinedDSP)
+ DSPExecP2(RISCCyclesPerScanline); // Pipelined DSP execution (3 stage)...
+ else
+ DSPExec(RISCCyclesPerScanline); // Ordinary non-pipelined DSP
+// DSPExecComp(RISCCyclesPerScanline); // Comparison core
+
+//if (start_logging)
+// WriteLog("About to execute OP (%u)...\n", i);
TOMExecScanline(i, render);
}
}
projects / virtualjaguar / blobdiff