// 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. :-)
-//
+//
#include "jaguar.h"
+
#include "video.h"
#include "settings.h"
//#include "m68kdasmAG.h"
+#include "clock.h"
+#include <SDL.h>
+#include "SDL_opengl.h"
+#include "m68k.h"
+#include "log.h"
+#include "tom.h"
+#include "jerry.h"
+#include "cdrom.h"
+#include "dsp.h"
+#include "gpu.h"
+#include "memory.h"
+#include "joystick.h"
+#include "gui.h"
#define CPU_DEBUG
//Do this in makefile??? Yes! Could, but it's easier to define here...
// Memory debugging identifiers
-char * whoName[9] =
+const char * whoName[9] =
{ "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" };
uint32 jaguar_active_memory_dumps = 0;
uint32 jaguar_mainRom_crc32, jaguarRomSize, jaguarRunAddress;
-/*static*/ uint8 * jaguar_mainRam = NULL;
-/*static*/ uint8 * jaguar_mainRom = NULL;
-/*static*/ uint8 * jaguar_bootRom = NULL;
-/*static*/ uint8 * jaguar_CDBootROM = NULL;
+uint8 * jaguar_mainRam = NULL;
+uint8 * jaguar_mainRom = NULL;
+uint8 * jaguar_bootRom = NULL;
+uint8 * jaguar_CDBootROM = NULL;
+bool BIOSLoaded = false;
+bool CDBIOSLoaded = false;
#ifdef CPU_DEBUG_MEMORY
uint8 writeMemMax[0x400000], writeMemMin[0x400000];
return JaguarReadLong(i * 4);
}
-uint32 jaguar_interrupt_handler_is_valid(uint32 i)
+uint32 jaguar_interrupt_handler_is_valid(uint32 i) // Debug use only...
{
uint32 handler = jaguar_get_handler(i);
if (handler && (handler != 0xFFFFFFFF))
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;
+// extern bool finished;
finished = true;
- extern bool doDSPDis;
+// extern bool doDSPDis;
if (who == DSP)
doDSPDis = true;
#endif
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;
+// extern bool finished;
finished = true;
- extern bool doDSPDis;
+// extern bool doDSPDis;
if (who == DSP)
doDSPDis = true;
#endif
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;
+// extern bool finished;
finished = true;
- extern bool doDSPDis;
+// extern bool doDSPDis;
if (who == DSP)
doDSPDis = true;
#endif
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;
+// extern bool finished;
finished = true;
- extern bool doDSPDis;
+// extern bool doDSPDis;
if (who == DSP)
doDSPDis = true;
#endif
JERRYWriteByte(offset, data, who);
return;
}
-
+
jaguar_unknown_writebyte(offset, data, who);
}
CDROMInit();
}
+//New timer based code stuffola...
+void ScanlineCallback(void);
+void RenderCallback(void);
+//extern uint32 * backbuffer;
void jaguar_reset(void)
{
+//NOTE: This causes a (virtual) crash if this is set in the config but not found... !!! FIX !!!
if (vjs.useJaguarBIOS)
memcpy(jaguar_mainRam, jaguar_bootRom, 8);
else
CDROMReset();
m68k_pulse_reset(); // Reset the 68000
WriteLog("Jaguar: 68K reset. PC=%06X SP=%08X\n", m68k_get_reg(NULL, M68K_REG_PC), m68k_get_reg(NULL, M68K_REG_A7));
+
+ // New timer base code stuffola...
+ InitializeEventList();
+ TOMResetBackbuffer(backbuffer);
+// SetCallbackTime(ScanlineCallback, 63.5555);
+ SetCallbackTime(ScanlineCallback, 31.77775);
+// SetCallbackTime(RenderCallback, 33303.082); // # Scanlines * scanline time
+// SetCallbackTime(RenderCallback, 16651.541); // # Scanlines * scanline time
}
void jaguar_done(void)
//
// Main Jaguar execution loop (1 frame)
//
-void JaguarExecute(int16 * backbuffer, bool render)
+void JaguarExecute(uint32 * backbuffer, bool render)
{
- uint16 vp = TOMReadWord(0xF0003E) + 1;//Hmm. This is a WO register. Will work? Looks like. But wrong behavior!
- uint16 vi = TOMReadWord(0xF0004E);//Another WO register...
+ uint16 vp = TOMReadWord(0xF0003E) + 1;
+ uint16 vi = TOMReadWord(0xF0004E);
//Using WO registers is OK, since we're the ones controlling access--there's nothing wrong here! ;-)
+//Though we shouldn't be able to do it using TOMReadWord... !!! FIX !!!
// uint16 vdb = TOMReadWord(0xF00046);
//Note: This is the *definite* end of the display, though VDE *might* be less than this...
// uint16 vde = TOMReadWord(0xF00048);
uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50);
+//Not sure the above is correct, since the number of lines and timings given in the JTRM
+//seem to indicate the refresh rate is *half* the above...
+// uint16 refreshRate = (vjs.hardwareTypeNTSC ? 30 : 25);
// Should these be hardwired or read from VP? Yes, from VP!
uint32 M68KCyclesPerScanline
= (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL) / (vp * refreshRate);
{
return jaguar_mainRam;
}
+
+//
+// New Jaguar execution stack
+//
+
+#if 0
+
+void JaguarExecuteNew(void)
+{
+ extern bool finished, showGUI;
+ extern bool debounceRunKey;
+ // Pass a message to the "joystick" code to debounce the ESC key...
+ debounceRunKey = true;
+ finished = false;
+/* InitializeEventList();
+ TOMResetBackbuffer(backbuffer);
+// SetCallbackTime(ScanlineCallback, 63.5555);
+ SetCallbackTime(ScanlineCallback, 31.77775);
+// SetCallbackTime(RenderCallback, 33303.082); // # Scanlines * scanline time
+// SetCallbackTime(RenderCallback, 16651.541); // # Scanlines * scanline time//*/
+// uint8 * keystate = SDL_GetKeyState(NULL);
+
+ do
+ {
+ double timeToNextEvent = GetTimeToNextEvent();
+//WriteLog("JEN: Time to next event (%u) is %f usec (%u RISC cycles)...\n", nextEvent, timeToNextEvent, USEC_TO_RISC_CYCLES(timeToNextEvent));
+
+ m68k_execute(USEC_TO_M68K_CYCLES(timeToNextEvent));
+ gpu_exec(USEC_TO_RISC_CYCLES(timeToNextEvent));
+
+ if (vjs.DSPEnabled)
+ {
+ if (vjs.usePipelinedDSP)
+ DSPExecP2(USEC_TO_RISC_CYCLES(timeToNextEvent)); // Pipelined DSP execution (3 stage)...
+ else
+ DSPExec(USEC_TO_RISC_CYCLES(timeToNextEvent)); // Ordinary non-pipelined DSP
+ }
+
+ HandleNextEvent();
+
+// if (keystate[SDLK_ESCAPE])
+// break;
+
+// SDL_PumpEvents(); // Needed to keep the keystate current...
+ }
+ while (!finished);
+}
+
+void ScanlineCallback(void)
+{
+ uint16 vc = TOMReadWord(0xF00006);
+ uint16 vp = TOMReadWord(0xF0003E) + 1;
+ uint16 vi = TOMReadWord(0xF0004E);
+// uint16 vbb = TOMReadWord(0xF00040);
+ vc++;
+
+ if (vc >= vp)
+ vc = 0;
+
+//WriteLog("SLC: Currently on line %u (VP=%u)...\n", vc, vp);
+ TOMWriteWord(0xF00006, vc);
+
+//This is a crappy kludge, but maybe it'll work for now...
+//Maybe it's not so bad, since the IRQ happens on a scanline boundary...
+ if (vc == vi && vc > 0 && tom_irq_enabled(IRQ_VBLANK)) // Time for Vertical Interrupt?
+ {
+ // We don't have to worry about autovectors & whatnot because the Jaguar
+ // tells you through its HW registers who sent the interrupt...
+ tom_set_pending_video_int();
+ m68k_set_irq(7);
+ }
+
+ TOMExecScanline(vc, true);
+
+//Change this to VBB???
+//Doesn't seem to matter (at least for Flip Out & I-War)
+ if (vc == 0)
+// if (vc == vbb)
+ {
+joystick_exec();
+
+ RenderBackbuffer();
+ TOMResetBackbuffer(backbuffer);
+ }//*/
+
+// if (vc == 0)
+// TOMResetBackbuffer(backbuffer);
+
+// SetCallbackTime(ScanlineCallback, 63.5555);
+ SetCallbackTime(ScanlineCallback, 31.77775);
+}
+
+#else
+
+bool frameDone;
+void JaguarExecuteNew(void)
+{
+// extern bool finished, showGUI;
+// extern bool debounceRunKey;
+ // Pass a message to the "joystick" code to debounce the ESC key...
+// debounceRunKey = true;
+// finished = false;
+/* InitializeEventList();
+ TOMResetBackbuffer(backbuffer);
+// SetCallbackTime(ScanlineCallback, 63.5555);
+ SetCallbackTime(ScanlineCallback, 31.77775);
+// SetCallbackTime(RenderCallback, 33303.082); // # Scanlines * scanline time
+// SetCallbackTime(RenderCallback, 16651.541); // # Scanlines * scanline time//*/
+// uint8 * keystate = SDL_GetKeyState(NULL);
+ frameDone = false;
+
+ do
+ {
+ double timeToNextEvent = GetTimeToNextEvent();
+//WriteLog("JEN: Time to next event (%u) is %f usec (%u RISC cycles)...\n", nextEvent, timeToNextEvent, USEC_TO_RISC_CYCLES(timeToNextEvent));
+
+ m68k_execute(USEC_TO_M68K_CYCLES(timeToNextEvent));
+ gpu_exec(USEC_TO_RISC_CYCLES(timeToNextEvent));
+
+ if (vjs.DSPEnabled)
+ {
+ if (vjs.usePipelinedDSP)
+ DSPExecP2(USEC_TO_RISC_CYCLES(timeToNextEvent)); // Pipelined DSP execution (3 stage)...
+ else
+ DSPExec(USEC_TO_RISC_CYCLES(timeToNextEvent)); // Ordinary non-pipelined DSP
+ }
+
+ HandleNextEvent();
+
+// if (keystate[SDLK_ESCAPE])
+// break;
+
+// SDL_PumpEvents(); // Needed to keep the keystate current...
+ }
+ while (!frameDone);
+}
+
+void ScanlineCallback(void)
+{
+ uint16 vc = TOMReadWord(0xF00006);
+ uint16 vp = TOMReadWord(0xF0003E) + 1;
+ uint16 vi = TOMReadWord(0xF0004E);
+// uint16 vbb = TOMReadWord(0xF00040);
+ vc++;
+
+ if (vc >= vp)
+ vc = 0;
+
+//WriteLog("SLC: Currently on line %u (VP=%u)...\n", vc, vp);
+ TOMWriteWord(0xF00006, vc);
+
+//This is a crappy kludge, but maybe it'll work for now...
+//Maybe it's not so bad, since the IRQ happens on a scanline boundary...
+ if (vc == vi && vc > 0 && tom_irq_enabled(IRQ_VBLANK)) // Time for Vertical Interrupt?
+ {
+ // We don't have to worry about autovectors & whatnot because the Jaguar
+ // tells you through its HW registers who sent the interrupt...
+ tom_set_pending_video_int();
+ m68k_set_irq(7);
+ }
+
+ TOMExecScanline(vc, true);
+
+//Change this to VBB???
+//Doesn't seem to matter (at least for Flip Out & I-War)
+ if (vc == 0)
+// if (vc == vbb)
+ {
+ JoystickExec();
+ RenderBackbuffer();
+ TOMResetBackbuffer(backbuffer);
+ frameDone = true;
+ }//*/
+
+// if (vc == 0)
+// TOMResetBackbuffer(backbuffer);
+
+// SetCallbackTime(ScanlineCallback, 63.5555);
+ SetCallbackTime(ScanlineCallback, 31.77775);
+}
+
+#endif
+
+// This isn't currently used, but maybe it should be...
+void RenderCallback(void)
+{
+ RenderBackbuffer();
+ TOMResetBackbuffer(backbuffer);
+// SetCallbackTime(RenderCallback, 33303.082); // # Scanlines * scanline time
+ SetCallbackTime(RenderCallback, 16651.541); // # Scanlines * scanline time
+}
projects / virtualjaguar / blobdiff