X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fjaguar.cpp;h=e80b356b199edbe6567e83da278923c957c429bb;hb=cdc64706c10d3fe005fecff5d000fe60b3980a3b;hp=582ec85d1de2662f6325c9d2dadd8b9d717486b0;hpb=ff3fa0b1ecf246a104ff10fa6c3dc225cccce82f;p=virtualjaguar diff --git a/src/jaguar.cpp b/src/jaguar.cpp index 582ec85..e80b356 100644 --- a/src/jaguar.cpp +++ b/src/jaguar.cpp @@ -3,32 +3,36 @@ // // 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 +// Cleanups and endian wrongness amelioration by James 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 Hammons +// +// WHO WHEN WHAT +// --- ---------- ----------------------------------------------------------- +// JLH 11/25/2009 Major rewrite of memory subsystem and handlers // #include "jaguar.h" #include #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 "jerry.h" #include "joystick.h" #include "log.h" -#include "m68k.h" -#include "memory.h" +#include "m68000/m68kinterface.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... @@ -37,6 +41,7 @@ #define ABORT_ON_ILLEGAL_INSTRUCTIONS //#define ABORT_ON_OFFICIAL_ILLEGAL_INSTRUCTION #define CPU_DEBUG_MEMORY +//#define LOG_CD_BIOS_CALLS // Private function prototypes @@ -54,26 +59,16 @@ extern int effect_start; extern int effect_start2, effect_start3, effect_start4, effect_start5, effect_start6; #endif -// Memory debugging identifiers +// Really, need to include memory.h for this, but it might interfere with some stuff... +extern uint8 jagMemSpace[]; -const char * whoName[9] = - { "Unknown", "Jaguar", "DSP", "GPU", "TOM", "JERRY", "M68K", "Blitter", "OP" }; +// Internal variables 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]; +bool jaguarCartInserted = false; +bool lowerField = false; #ifdef CPU_DEBUG_MEMORY uint8 writeMemMax[0x400000], writeMemMin[0x400000]; @@ -94,6 +89,37 @@ static bool start = false; void M68KInstructionHook(void) { uint32 m68kPC = m68k_get_reg(NULL, M68K_REG_PC); +// Temp, for comparing... +{ +/* static char buffer[2048];//, mem[64]; + m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000); + printf("%08X: %s\n", m68kPC, buffer);//*/ +} +//JaguarDasm(m68kPC, 1); +//Testing Hover Strike... +#if 0 +//Dasm(regs.pc, 1); +static int hitCount = 0; +static int inRoutine = 0; +static int instSeen; + +//if (regs.pc == 0x80340A) +if (m68kPC == 0x803416) +{ + hitCount++; + inRoutine = 1; + instSeen = 0; + printf("%i: $80340A start. A0=%08X, A1=%08X ", hitCount, m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1)); +} +else if (m68kPC == 0x803422) +{ + inRoutine = 0; + printf("(%i instructions)\n", instSeen); +} + +if (inRoutine) + instSeen++; +#endif // For tracebacks... // Ideally, we'd save all the registers as well... @@ -107,7 +133,7 @@ void M68KInstructionHook(void) static char buffer[2048]; for(int i=0; i<0x400; i++) { - m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], M68K_CPU_TYPE_68000); + m68k_disassemble(buffer, pcQueue[(pcQPtr + i) & 0x3FF], 0);//M68K_CPU_TYPE_68000); WriteLog("\t%08X: %s\n", pcQueue[(pcQPtr + i) & 0x3FF], buffer); } WriteLog("\n"); @@ -116,12 +142,21 @@ void M68KInstructionHook(void) 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", ((TOMIRQEnabled(IRQ_VBLANK)) && (JaguarInterruptHandlerIsValid(64))) ? "enabled" : "disabled"); + WriteLog("Jaguar: VBL interrupt is %s\n", ((TOMIRQEnabled(IRQ_VIDEO)) && (JaguarInterruptHandlerIsValid(64))) ? "enabled" : "disabled"); M68K_show_context(); LogDone(); exit(0); } + // Disassemble everything +/* { + static char buffer[2048]; + m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000); + WriteLog("%08X: %s", m68kPC, buffer); + WriteLog("\t\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)); + }//*/ /* if (m68kPC >= 0x807EC4 && m68kPC <= 0x807EDB) { static char buffer[2048]; @@ -238,7 +273,7 @@ if (m68kPC == 0x802058) start = true; if (m68kPC == 0x82E1A) { static char buffer[2048]; - m68k_disassemble(buffer, m68kPC, M68K_CPU_TYPE_68000); + m68k_disassemble(buffer, m68kPC, 0);//M68K_CPU_TYPE_68000); WriteLog("--> [Routine start] %08X: %s", m68kPC, buffer); WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X(cmd), D1=%08X(# bytes), D2=%08X\n", m68k_get_reg(NULL, M68K_REG_A0), m68k_get_reg(NULL, M68K_REG_A1), @@ -251,6 +286,8 @@ if (m68kPC == 0x802058) start = true; WriteLog("--> [Calling BusWrite2] D2: %08X\n", m68k_get_reg(NULL, M68K_REG_D2)); // m68k_set_reg(M68K_REG_D2, 0x12345678); }//*/ + +#ifdef LOG_CD_BIOS_CALLS /* CD_init:: -> $3000 BIOS_VER:: -> $3004 @@ -316,9 +353,10 @@ CD_switch:: -> $306C WriteLog("\t\tA0=%08X, A1=%08X, D0=%08X, D1=%08X, D2=%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), m68k_get_reg(NULL, M68K_REG_D2)); -//*/ +#endif + #ifdef ABORT_ON_ILLEGAL_INSTRUCTIONS - if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), M68K_CPU_TYPE_68000)) + if (!m68k_is_valid_instruction(m68k_read_memory_16(m68kPC), 0))//M68K_CPU_TYPE_68000)) { #ifndef ABORT_ON_OFFICIAL_ILLEGAL_INSTRUCTION if (m68k_read_memory_16(m68kPC) == 0x4AFC) @@ -338,9 +376,22 @@ CD_switch:: -> $306C WriteLog("\nM68K encountered an illegal instruction at %08X!!!\n\nAborting!\n", m68kPC); uint32 topOfStack = m68k_get_reg(NULL, M68K_REG_A7); WriteLog("M68K: Top of stack: %08X. Stack trace:\n", JaguarReadLong(topOfStack)); + uint32 address = topOfStack - (8 * 4 * 3); + 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", ((TOMIRQEnabled(IRQ_VBLANK)) && (JaguarInterruptHandlerIsValid(64))) ? "enabled" : "disabled"); + { + WriteLog("%06X:", address); + + for(int j=0; j<8; j++) + { + WriteLog(" %08X", JaguarReadLong(address); + address += 4; + } + + WriteLog("\n"); + } + + WriteLog("Jaguar: VBL interrupt is %s\n", ((TOMIRQEnabled(IRQ_VIDEO)) && (JaguarInterruptHandlerIsValid(64))) ? "enabled" : "disabled"); M68K_show_context(); //temp @@ -436,7 +487,7 @@ ADDRESS_MAP_END */ #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 @@ -780,29 +831,132 @@ uint32 ReadDWord(uint32 adddress) } #endif +void ShowM68KContext(void) +{ + printf("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC)); + + for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++) + { + printf("D%i = %08X ", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i)); + + if (i == M68K_REG_D3 || i == M68K_REG_D7) + printf("\n"); + } + + for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++) + { + printf("A%i = %08X ", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i)); + + if (i == M68K_REG_A3 || i == M68K_REG_A7) + printf("\n"); + } + + uint32_t currpc = m68k_get_reg(NULL, M68K_REG_PC); + uint32_t disPC = currpc - 30; + char buffer[128]; + + do + { + uint32_t oldpc = disPC; + disPC += m68k_disassemble(buffer, disPC, 0); + printf("%s%08X: %s\n", (oldpc == currpc ? ">" : " "), oldpc, buffer); + } + while (disPC < (currpc + 10)); +} + // -// Musashi 68000 read/write/IRQ functions +// Custom UAE 68000 read/write/IRQ functions // +#if 0 +IRQs: +=-=-= + + IPL Name Vector Control + ---------+---------------+---------------+--------------- + 2 VBLANK IRQ $100 INT1 bit #0 + 2 GPU IRQ $100 INT1 bit #1 + 2 HBLANK IRQ $100 INT1 bit #2 + 2 Timer IRQ $100 INT1 bit #3 + + Note: Both timer interrupts (JPIT && PIT) are on the same INT1 bit. + and are therefore indistinguishable. + + A typical way to install a LEVEL2 handler for the 68000 would be + something like this, you gotta supply "last_line" and "handler". + Note that the interrupt is auto vectored thru $100 (not $68) + + + V_AUTO = $100 + VI = $F004E + INT1 = $F00E0 + INT2 = $F00E2 + + IRQS_HANDLED=$909 ;; VBLANK and TIMER + + move.w #$2700,sr ;; no IRQs please + move.l #handler,V_AUTO ;; install our routine + + move.w #last_line,VI ;; scanline where IRQ should occur + ;; should be 'odd' BTW + move.w #IRQS_HANDLE&$FF,INT1 ;; enable VBLANK + TIMER + move.w #$2100,sr ;; enable IRQs on the 68K + ... + +handler: + move.w d0,-(a7) + move.w INT1,d0 + btst.b #0,d0 + bne.b .no_blank + + ... + +.no_blank: + btst.b #3,d0 + beq.b .no_timer + + ... + +.no_timer: + move.w #IRQS_HANDLED,INT1 ; clear latch, keep IRQ alive + move.w #0,INT2 ; let GPU run again + move.w (a7)+,d0 + rte + + As you can see, if you have multiple INT1 interrupts coming in, + you need to check the lower byte of INT1, to see which interrupt + happened. +#endif int irq_ack_handler(int level) { - int vector = M68K_INT_ACK_AUTOVECTOR; + // Tracing the IPL lines on the Jaguar schematic yields the following: + // IPL1 is connected to INTL on TOM (OUT to 68K) + // IPL0-2 are also tied to Vcc via 4.7K resistors! + // (DINT on TOM goes into DINT on JERRY (IN Tom from Jerry)) + // There doesn't seem to be any other path to IPL0 or 2 on the schematic, which means + // that *all* IRQs to the 68K are routed thru TOM at level 2. Which means they're all maskable. // The GPU/DSP/etc are probably *not* issuing an NMI, but it seems to work OK... + // They aren't, and this causes problems with a, err, specific ROM. :-D - if (level == 7) + if (level == 2) { - m68k_set_irq(0); // Clear the IRQ... - vector = 64; // Set user interrupt #0 + m68k_set_irq(0); // Clear the IRQ (NOTE: Without this, the BIOS fails)... + return 64; // Set user interrupt #0 } - return vector; + return M68K_INT_ACK_AUTOVECTOR; } +//#define USE_NEW_MMU + unsigned int m68k_read_memory_8(unsigned int address) { + // Musashi does this automagically for you, UAE core does not :-P + address &= 0x00FFFFFF; #ifdef CPU_DEBUG_MEMORY - if ((address >= 0x000000) && (address <= 0x3FFFFF)) + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFF)) { if (startMemLog) readMem[address] = 1; @@ -813,15 +967,19 @@ unsigned int m68k_read_memory_8(unsigned int address) /* 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]; + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFF)) + 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]; +// retVal = jaguarDevBootROM1[address - 0xE00000]; + retVal = jagMemSpace[address]; else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF)) retVal = CDROMReadByte(address); else if ((address >= 0xF00000) && (address <= 0xF0FFFF)) @@ -836,6 +994,9 @@ unsigned int m68k_read_memory_8(unsigned int address) //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); @@ -843,6 +1004,8 @@ void gpu_dump_registers(void); unsigned int m68k_read_memory_16(unsigned int address) { + // Musashi does this automagically for you, UAE core does not :-P + address &= 0x00FFFFFF; #ifdef CPU_DEBUG_MEMORY /* if ((address >= 0x000000) && (address <= 0x3FFFFE)) { @@ -903,16 +1066,20 @@ unsigned int m68k_read_memory_16(unsigned int address) /* 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)) + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFE)) // 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]; +// retVal = (jaguarDevBootROM1[address - 0xE00000] << 8) | jaguarDevBootROM1[address - 0xE00000 + 1]; + retVal = (jagMemSpace[address] << 8) | jagMemSpace[address + 1]; else if ((address >= 0xDFFF00) && (address <= 0xDFFFFE)) retVal = CDROMReadWord(address, M68K); else if ((address >= 0xF00000) && (address <= 0xF0FFFE)) @@ -931,22 +1098,34 @@ unsigned int m68k_read_memory_16(unsigned int address) //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) { + // Musashi does this automagically for you, UAE core does not :-P + address &= 0x00FFFFFF; //; So, it seems that it stores the returned DWORD at $51136 and $FB074. /* if (address == 0x51136 || address == 0xFB074 || address == 0x1AF05E) 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) { + // Musashi does this automagically for you, UAE core does not :-P + address &= 0x00FFFFFF; #ifdef CPU_DEBUG_MEMORY - if ((address >= 0x000000) && (address <= 0x3FFFFF)) + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFF)) { if (startMemLog) { @@ -957,15 +1136,26 @@ void m68k_write_memory_8(unsigned int address, unsigned int value) } } #endif +/*if (address == 0x4E00) + WriteLog("M68K: Writing %02X at %08X, PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));//*/ //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F)) // WriteLog("M68K: Writing %02X at %08X\n", value, address); //WriteLog("[WM8 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value); /*if (effect_start) if (address >= 0x18FA70 && address < (0x18FA70 + 8000)) WriteLog("M68K: Byte %02X written at %08X by 68K\n", value, address);//*/ - - if ((address >= 0x000000) && (address <= 0x3FFFFF)) - jaguarMainRam[address] = value; +//$53D0 +/*if (address >= 0x53D0 && address <= 0x53FF) + printf("M68K: Writing byte $%02X at $%08X, PC=$%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));//*/ +//Testing AvP on UAE core... +//000075A0: FFFFF80E B6320220 (BITMAP) +/*if (address == 0x75A0 && value == 0xFF) + printf("M68K: (8) Tripwire hit...\n");//*/ + +#ifndef USE_NEW_MMU + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFF)) + jaguarMainRAM[address] = value; else if ((address >= 0xDFFF00) && (address <= 0xDFFFFF)) CDROMWriteByte(address, value, M68K); else if ((address >= 0xF00000) && (address <= 0xF0FFFF)) @@ -974,12 +1164,18 @@ void m68k_write_memory_8(unsigned int address, unsigned int value) 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) { + // Musashi does this automagically for you, UAE core does not :-P + address &= 0x00FFFFFF; #ifdef CPU_DEBUG_MEMORY - if ((address >= 0x000000) && (address <= 0x3FFFFE)) + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFE)) { if (startMemLog) { @@ -997,6 +1193,8 @@ void m68k_write_memory_16(unsigned int address, unsigned int value) } } #endif +/*if (address == 0x4E00) + WriteLog("M68K: Writing %02X at %08X, PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));//*/ //if ((address >= 0x1FF020 && address <= 0x1FF03F) || (address >= 0x1FF820 && address <= 0x1FF83F)) // WriteLog("M68K: Writing %04X at %08X\n", value, address); //WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value); @@ -1020,12 +1218,24 @@ if (address == 0xF02110) /* if (address == 0x51136 || address == 0x51138 || address == 0xFB074 || address == 0xFB076 || address == 0x1AF05E) WriteLog("[WM16 PC=%08X] Addr: %08X, val: %04X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);//*/ +//$53D0 +/*if (address >= 0x53D0 && address <= 0x53FF) + printf("M68K: Writing word $%04X at $%08X, PC=$%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));//*/ +//Testing AvP on UAE core... +//000075A0: FFFFF80E B6320220 (BITMAP) +/*if (address == 0x75A0 && value == 0xFFFF) +{ + printf("\nM68K: (16) Tripwire hit...\n"); + ShowM68KContext(); +}//*/ - if ((address >= 0x000000) && (address <= 0x3FFFFE)) +#ifndef USE_NEW_MMU + // Note that the Jaguar only has 2M of RAM, not 4! + if ((address >= 0x000000) && (address <= 0x1FFFFE)) { /* 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); @@ -1042,10 +1252,17 @@ if (address == 0xF02110) 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) { + // Musashi does this automagically for you, UAE core does not :-P + address &= 0x00FFFFFF; +/*if (address == 0x4E00) + WriteLog("M68K: Writing %02X at %08X, PC=%08X\n", value, address, m68k_get_reg(NULL, M68K_REG_PC));//*/ //WriteLog("--> [WM32]\n"); /*if (address == 0x0100)//64*4) WriteLog("M68K: Wrote dword to VI vector value %08X...\n", value);//*/ @@ -1058,9 +1275,20 @@ if (address == 0xF03214 && value == 0x88E30047) doGPUDis = true;//*/ /* if (address == 0x51136 || address == 0xFB074) WriteLog("[WM32 PC=%08X] Addr: %08X, val: %02X\n", m68k_get_reg(NULL, M68K_REG_PC), address, value);//*/ +//Testing AvP on UAE core... +//000075A0: FFFFF80E B6320220 (BITMAP) +/*if (address == 0x75A0 && (value & 0xFFFF0000) == 0xFFFF0000) +{ + printf("\nM68K: (32) Tripwire hit...\n"); + ShowM68KContext(); +}//*/ +#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 } @@ -1077,12 +1305,23 @@ bool JaguarInterruptHandlerIsValid(uint32 i) // Debug use only... void M68K_show_context(void) { - WriteLog("\t68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC)); + WriteLog("68K PC=%06X\n", m68k_get_reg(NULL, M68K_REG_PC)); + for(int i=M68K_REG_D0; i<=M68K_REG_D7; i++) - WriteLog("\tD%i = %08X\n", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i)); - WriteLog("\n"); + { + WriteLog("D%i = %08X ", i-M68K_REG_D0, m68k_get_reg(NULL, (m68k_register_t)i)); + + if (i == M68K_REG_D3 || i == M68K_REG_D7) + WriteLog("\n"); + } + for(int i=M68K_REG_A0; i<=M68K_REG_A7; i++) - WriteLog("\tA%i = %08X\n", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i)); + { + WriteLog("A%i = %08X ", i-M68K_REG_A0, m68k_get_reg(NULL, (m68k_register_t)i)); + + if (i == M68K_REG_A3 || i == M68K_REG_A7) + WriteLog("\n"); + } WriteLog("68K disasm\n"); // jaguar_dasm(s68000readPC()-0x1000,0x20000); @@ -1094,18 +1333,26 @@ void M68K_show_context(void) WriteLog("..................\n"); - if (TOMIRQEnabled(IRQ_VBLANK)) + if (TOMIRQEnabled(IRQ_VIDEO)) { - WriteLog("vblank int: enabled\n"); + WriteLog("video int: enabled\n"); JaguarDasm(JaguarGetHandler(64), 0x200); } else - WriteLog("vblank int: disabled\n"); + WriteLog("video int: disabled\n"); WriteLog("..................\n"); for(int i=0; i<256; i++) - WriteLog("handler %03i at $%08X\n", i, (unsigned int)JaguarGetHandler(i)); + { + WriteLog("handler %03i at ", i);//$%08X\n", i, (unsigned int)JaguarGetHandler(i)); + uint32 address = (uint32)JaguarGetHandler(i); + + if (address == 0) + WriteLog(".........\n"); + else + WriteLog("$%08X\n", address); + } } // @@ -1220,7 +1467,7 @@ void JaguarDasm(uint32 offset, uint32 qt) pc += Dasm68000((char *)mem, buffer, 0); WriteLog("%08X: %s\n", oldpc, buffer);//*/ oldpc = pc; - pc += m68k_disassemble(buffer, pc, M68K_CPU_TYPE_68000); + pc += m68k_disassemble(buffer, pc, 0);//M68K_CPU_TYPE_68000); WriteLog("%08X: %s\n", oldpc, buffer);//*/ } #endif @@ -1231,14 +1478,16 @@ uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/) uint8 data = 0x00; offset &= 0xFFFFFF; - if (offset < 0x400000) - data = jaguarMainRam[offset & 0x3FFFFF]; + if (offset < 0x200000) + 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]; +// data = jaguarDevBootROM1[offset & 0x3FFFF]; + data = jagMemSpace[offset]; else if ((offset >= 0xF00000) && (offset < 0xF10000)) data = TOMReadByte(offset, who); else if ((offset >= 0xF10000) && (offset < 0xF20000)) @@ -1252,20 +1501,22 @@ uint8 JaguarReadByte(uint32 offset, uint32 who/*=UNKNOWN*/) uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/) { offset &= 0xFFFFFF; - if (offset <= 0x3FFFFE) + if (offset <= 0x1FFFFE) { - return (jaguarMainRam[(offset+0) & 0x3FFFFF] << 8) | jaguarMainRam[(offset+1) & 0x3FFFFF]; + return (jaguarMainRAM[(offset+0) & 0x1FFFFF] << 8) | jaguarMainRAM[(offset+1) & 0x1FFFFF]; } 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]; +// return (jaguarDevBootROM1[(offset+0) & 0x3FFFF] << 8) | jaguarDevBootROM1[(offset+1) & 0x3FFFF]; + return (jagMemSpace[offset + 0] << 8) | jagMemSpace[offset + 1]; else if ((offset >= 0xF00000) && (offset <= 0xF0FFFE)) return TOMReadWord(offset, who); else if ((offset >= 0xF10000) && (offset <= 0xF1FFFE)) @@ -1276,15 +1527,17 @@ uint16 JaguarReadWord(uint32 offset, uint32 who/*=UNKNOWN*/) void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/) { +/* if (offset >= 0x4E00 && offset < 0x4E04) + WriteLog("JWB: Byte %02X written at %08X by %s\n", data, offset, whoName[who]);//*/ //Need to check for writes in the range of $18FA70 + 8000... /*if (effect_start) if (offset >= 0x18FA70 && offset < (0x18FA70 + 8000)) WriteLog("JWB: Byte %02X written at %08X by %s\n", data, offset, whoName[who]);//*/ offset &= 0xFFFFFF; - if (offset < 0x400000) + if (offset < 0x200000) { - jaguarMainRam[offset & 0x3FFFFF] = data; + jaguarMainRAM[offset & 0x1FFFFF] = data; return; } else if ((offset >= 0xDFFF00) && (offset <= 0xDFFFFF)) @@ -1309,6 +1562,8 @@ void JaguarWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/) uint32 starCount; void JaguarWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/) { +/* if (offset >= 0x4E00 && offset < 0x4E04) + WriteLog("JWW: Word %04X written at %08X by %s\n", data, offset, whoName[who]);//*/ /*if (offset == 0x0100)//64*4) WriteLog("M68K: %s wrote word to VI vector value %04X...\n", whoName[who], data); if (offset == 0x0102)//64*4) @@ -1324,7 +1579,7 @@ if (offset == 0x0102)//64*4) offset &= 0xFFFFFF; - if (offset <= 0x3FFFFE) + if (offset <= 0x1FFFFE) { /* GPU Table (CD BIOS) @@ -1412,8 +1667,8 @@ if (who == GPU && (gpu_pc == 0xF03604 || gpu_pc == 0xF03638)) 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) & 0x1FFFFF] = data >> 8; + jaguarMainRAM[(offset+1) & 0x1FFFFF] = data & 0xFF; return; } else if (offset >= 0xDFFF00 && offset <= 0xDFFFFE) @@ -1460,6 +1715,18 @@ void JaguarWriteLong(uint32 offset, uint32 data, uint32 who/*=UNKNOWN*/) JaguarWriteWord(offset+2, data & 0xFFFF, who); } +void JaguarSetScreenBuffer(uint32 * buffer) +{ + // This is in TOM, but we set it here... + screenBuffer = buffer; +} + +void JaguarSetScreenPitch(uint32 pitch) +{ + // This is in TOM, but we set it here... + screenPitch = pitch; +} + // // Jaguar console initialization // @@ -1470,16 +1737,20 @@ void JaguarInit(void) memset(writeMemMin, 0xFF, 0x400000); memset(writeMemMax, 0x00, 0x400000); #endif - memset(jaguarMainRam, 0x00, 0x400000); + memset(jaguarMainRAM, 0x00, 0x200000); // 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... + lowerField = false; // Reset the lower field flag +//temp, for crappy crap that sux +memset(jaguarMainRAM + 0x804, 0xFF, 4); - m68k_set_cpu_type(M68K_CPU_TYPE_68000); +// m68k_set_cpu_type(M68K_CPU_TYPE_68000); + m68k_pulse_reset(); // Need to do this so UAE disasm doesn't segfault on exit GPUInit(); DSPInit(); TOMInit(); @@ -1488,16 +1759,21 @@ void JaguarInit(void) } //New timer based code stuffola... -void ScanlineCallback(void); +void HalflineCallback(void); void RenderCallback(void); -//extern uint32 * backbuffer; void JaguarReset(void) { -//NOTE: This causes a (virtual) crash if this is set in the config but not found... !!! FIX !!! - if (vjs.useJaguarBIOS) - memcpy(jaguarMainRam, jaguarBootRom, 8); + // New timer base code stuffola... + InitializeEventList(); +//Need to change this so it uses the single RAM space and load the BIOS +//into it somewhere... +//Also, have to change this here and in JaguarReadXX() currently + // Only use the system BIOS if it's available...! (it's always available now!) + // AND only if a jaguar cartridge has been inserted. + if (vjs.useJaguarBIOS && jaguarCartInserted && !vjs.hardwareTypeAlpine) + memcpy(jaguarMainRAM, jagMemSpace + 0xE00000, 8); else - SET32(jaguarMainRam, 4, jaguarRunAddress); + SET32(jaguarMainRAM, 4, jaguarRunAddress); // WriteLog("jaguar_reset():\n"); TOMReset(); @@ -1508,13 +1784,10 @@ void JaguarReset(void) 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); + lowerField = false; // Reset the lower field flag // SetCallbackTime(ScanlineCallback, 63.5555); - SetCallbackTime(ScanlineCallback, 31.77775); -// SetCallbackTime(RenderCallback, 33303.082); // # Scanlines * scanline time -// SetCallbackTime(RenderCallback, 16651.541); // # Scanlines * scanline time +// SetCallbackTime(ScanlineCallback, 31.77775); + SetCallbackTime(HalflineCallback, (vjs.hardwareTypeNTSC ? 31.777777777 : 32.0)); } void JaguarDone(void) @@ -1591,102 +1864,67 @@ void JaguarDone(void) WriteLog("\n");//*/ // WriteLog("Jaguar: CD BIOS version %04X\n", JaguarReadWord(0x3004)); - WriteLog("Jaguar: Interrupt enable = %02X\n", TOMReadByte(0xF000E1) & 0x1F); - WriteLog("Jaguar: VBL interrupt is %s\n", ((TOMIRQEnabled(IRQ_VBLANK)) && (JaguarInterruptHandlerIsValid(64))) ? "enabled" : "disabled"); + WriteLog("Jaguar: Interrupt enable = $%02X\n", TOMReadByte(0xF000E1, JAGUAR) & 0x1F); + WriteLog("Jaguar: Video interrupt is %s (line=%u)\n", ((TOMIRQEnabled(IRQ_VIDEO)) + && (JaguarInterruptHandlerIsValid(64))) ? "enabled" : "disabled", TOMReadWord(0xF0004E, JAGUAR)); M68K_show_context(); //#endif +#if 0 // This is drawn already... + WriteLog("Jaguar: 68K AutoVector table:\n", JaguarReadWord(0x3004)); + for(uint32 i=0x64; i<=0x7C; i+=4) + WriteLog(" #%u: %08X\n", (i-0x64)/4, JaguarReadLong(i)); +#endif + CDROMDone(); GPUDone(); DSPDone(); TOMDone(); JERRYDone(); -} - -// -// Main Jaguar execution loop (1 frame) -// -void JaguarExecute(uint32 * backbuffer, bool render) -{ - 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 vbb = TOMReadWord(0xF00040); -//It seems that they mean it when they say that VDE is the end of object processing. -//However, we need to be able to tell the OP (or TOM) that we've reached the end of the -//buffer and not to write any more pixels... !!! FIX !!! -// uint16 vde = TOMReadWord(0xF00048); - - uint16 refreshRate = (vjs.hardwareTypeNTSC ? 60 : 50); - uint32 m68kClockRate = (vjs.hardwareTypeNTSC ? M68K_CLOCK_RATE_NTSC : M68K_CLOCK_RATE_PAL); -//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 = m68kClockRate / (vp * refreshRate); - uint32 RISCCyclesPerScanline = m68kClockRate / (vp * refreshRate); - - TOMResetBackbuffer(backbuffer); -/*extern int effect_start; -if (effect_start) - WriteLog("JagExe: VP=%u, VI=%u, CPU CPS=%u, GPU CPS=%u\n", vp, vi, M68KCyclesPerScanline, RISCCyclesPerScanline);//*/ - -//extern int start_logging; - for(uint16 i=0; i 0 && TOMIRQEnabled(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... - TOMSetPendingVideoInt(); - m68k_set_irq(7); - } -//if (start_logging) -// WriteLog("About to execute M68K (%u)...\n", i); - m68k_execute(M68KCyclesPerScanline); -//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); - JERRYExecPIT(RISCCyclesPerScanline); -//if (start_logging) -// WriteLog("About to execute JERRY's SSI (%u)...\n", i); - JERRYI2SExec(RISCCyclesPerScanline); - BUTCHExec(RISCCyclesPerScanline); -//if (start_logging) -// WriteLog("About to execute GPU (%u)...\n", i); - GPUExec(RISCCyclesPerScanline); - - if (vjs.DSPEnabled) - { - 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); - } + // temp, until debugger is in place +//00802016: jsr $836F1A.l +//0080201C: jsr $836B30.l +//00802022: jsr $836B18.l +//00802028: jsr $8135F0.l +//00813C1E: jsr $813F76.l +//00802038: jsr $836D00.l +//00802098: jsr $8373A4.l +//008020A2: jsr $83E24A.l +//008020BA: jsr $83E156.l +//008020C6: jsr $83E19C.l +//008020E6: jsr $8445E8.l +//008020EC: jsr $838C20.l +//0080211A: jsr $838ED6.l +//00802124: jsr $89CA56.l +//0080212A: jsr $802B48.l +#if 0 + WriteLog("-------------------------------------------\n"); + JaguarDasm(0x8445E8, 0x200); + WriteLog("-------------------------------------------\n"); + JaguarDasm(0x838C20, 0x200); + WriteLog("-------------------------------------------\n"); + JaguarDasm(0x838ED6, 0x200); + WriteLog("-------------------------------------------\n"); + JaguarDasm(0x89CA56, 0x200); + WriteLog("-------------------------------------------\n"); + JaguarDasm(0x802B48, 0x200); + WriteLog("\n\nM68000 disassembly at $802000...\n"); + JaguarDasm(0x802000, 6000); + WriteLog("\n");//*/ +#endif +/* WriteLog("\n\nM68000 disassembly at $6004...\n"); + JaguarDasm(0x6004, 10000); + WriteLog("\n");//*/ +// WriteLog("\n\nM68000 disassembly at $802000...\n"); +// JaguarDasm(0x802000, 0x1000); +// WriteLog("\n\nM68000 disassembly at $4100...\n"); +// JaguarDasm(0x4100, 200); +// WriteLog("\n\nM68000 disassembly at $800800...\n"); +// JaguarDasm(0x800800, 0x1000); } + // Temp debugging stuff void DumpMainMemory(void) @@ -1696,123 +1934,24 @@ void DumpMainMemory(void) if (fp == NULL) return; - fwrite(jaguarMainRam, 1, 0x400000, fp); + fwrite(jaguarMainRAM, 1, 0x400000, fp); fclose(fp); } + uint8 * GetRamPtr(void) { - return jaguarMainRam; + return jaguarMainRAM; } + // // New Jaguar execution stack +// This executes 1 frame's worth of code. // - -#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 @@ -1821,77 +1960,108 @@ void JaguarExecuteNew(void) //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)); - GPUExec(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 - } + if (vjs.GPUEnabled) + GPUExec(USEC_TO_RISC_CYCLES(timeToNextEvent)); HandleNextEvent(); - -// if (keystate[SDLK_ESCAPE]) -// break; - -// SDL_PumpEvents(); // Needed to keep the keystate current... } while (!frameDone); } -void ScanlineCallback(void) + +#define USE_CORRECT_PAL_TIMINGS +// A lot of confusion comes from here... +// The thing to keep in mind is that the VC is advanced every HALF line, regardless +// of whether the display is interlaced or not. The only difference with an +// interlaced display is that the high bit of VC will be set when the lower +// field is being rendered. (NB: The high bit of VC is ALWAYS set on the lower field, +// regardless of whether it's in interlace mode or not. +// NB2: Seems it doens't always, not sure what the constraint is...) +// +// Normally, TVs will render a full frame in 1/30s (NTSC) or 1/25s (PAL) by +// rendering two fields that are slighty vertically offset from each other. +// Each field is created in 1/60s (NTSC) or 1/50s (PAL), and every other line +// is rendered in this mode so that each field, when overlaid on each other, +// will yield the final picture at the full resolution for the full frame. +// +// We execute a half frame in each timeslice (1/60s NTSC, 1/50s PAL). +// Since the number of lines in a FULL frame is 525 for NTSC, 625 for PAL, +// it will be half this number for a half frame. BUT, since we're counting +// HALF lines, we double this number and we're back at 525 for NTSC, 625 for PAL. +// +// Scanline times are 63.5555... s in NTSC and 64 s in PAL +// Half line times are, naturally, half of this. :-P +void HalflineCallback(void) { - uint16 vc = TOMReadWord(0xF00006); - uint16 vp = TOMReadWord(0xF0003E) + 1; - uint16 vi = TOMReadWord(0xF0004E); -// uint16 vbb = TOMReadWord(0xF00040); +//OK, this is hardwired to run in NTSC, and for who knows how long. +//Need to fix this so that it does a half-line in the correct amount of time +//and number of lines, depending on which mode we're in. [FIXED] + uint16 vc = TOMReadWord(0xF00006, JAGUAR); + uint16 vp = TOMReadWord(0xF0003E, JAGUAR) + 1; + uint16 vi = TOMReadWord(0xF0004E, JAGUAR); +// uint16 vbb = TOMReadWord(0xF00040, JAGUAR); vc++; - if (vc >= vp) +#ifdef USE_CORRECT_PAL_TIMINGS + // Each # of lines is for a full frame == 1/30s (NTSC), 1/25s (PAL). + // So we cut the number of half-lines in a frame in half. :-P + uint16 numHalfLines = ((vjs.hardwareTypeNTSC ? 525 : 625) * 2) / 2; + + if ((vc & 0x7FF) >= numHalfLines) +#else + if ((vc & 0x7FF) >= vp) +#endif + { vc = 0; +// lowerField = !lowerField; + + // If we're rendering the lower field, set the high bit (#12, counting + // from 1) of VC + if (lowerField) + vc = 0x0800; + } //WriteLog("SLC: Currently on line %u (VP=%u)...\n", vc, vp); - TOMWriteWord(0xF00006, vc); + TOMWriteWord(0xF00006, vc, JAGUAR); //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 && TOMIRQEnabled(IRQ_VBLANK)) // Time for Vertical Interrupt? + if ((vc & 0x7FF) == vi && (vc & 0x7FF) > 0 && TOMIRQEnabled(IRQ_VIDEO)) // 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... TOMSetPendingVideoInt(); - m68k_set_irq(7); + m68k_set_irq(2); } - TOMExecScanline(vc, true); + TOMExecHalfline(vc, true); //Change this to VBB??? //Doesn't seem to matter (at least for Flip Out & I-War) - if (vc == 0) + if ((vc & 0x7FF) == 0) // if (vc == vbb) { JoystickExec(); - RenderBackbuffer(); - TOMResetBackbuffer(backbuffer); frameDone = true; }//*/ -// if (vc == 0) -// TOMResetBackbuffer(backbuffer); - -// SetCallbackTime(ScanlineCallback, 63.5555); - SetCallbackTime(ScanlineCallback, 31.77775); +#ifdef USE_CORRECT_PAL_TIMINGS + SetCallbackTime(HalflineCallback, (vjs.hardwareTypeNTSC ? 31.777777777 : 32.0)); +#else +// SetCallbackTime(HalflineCallback, 63.5555); + SetCallbackTime(HalflineCallback, 31.77775); +#endif } -#endif // This isn't currently used, but maybe it should be... +/* +Nah, the scanline based code is good enough, and runs in 1 frame. The GUI +handles all the rest, so this isn't needed. :-P +*/ void RenderCallback(void) { - RenderBackbuffer(); - TOMResetBackbuffer(backbuffer); // SetCallbackTime(RenderCallback, 33303.082); // # Scanlines * scanline time SetCallbackTime(RenderCallback, 16651.541); // # Scanlines * scanline time }