X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fjerry.cpp;h=8172c253d7a087563ca2308bd2f49c933576d639;hb=5c28b6dbf7aa20441c8a51f484f4f64b1966f7e3;hp=2212cf285b8b4914567691817ba967e6ee3d9cdb;hpb=2f21d8ee63902b160acbaf4c26caaaa0e23ca62f;p=virtualjaguar diff --git a/src/jerry.cpp b/src/jerry.cpp index 2212cf2..8172c25 100644 --- a/src/jerry.cpp +++ b/src/jerry.cpp @@ -3,9 +3,9 @@ // // Originally by David Raingeard // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Carwin Jones (BeOS) -// Cleanups/rewrites/fixes by James L. Hammons +// Cleanups/rewrites/fixes by James Hammons // -// JLH = James L. Hammons +// JLH = James Hammons // // WHO WHEN WHAT // --- ---------- ----------------------------------------------------------- @@ -163,12 +163,13 @@ #include "jaguar.h" #include "joystick.h" #include "log.h" -#include "m68k.h" +#include "m68000/m68kinterface.h" +#include "settings.h" +#include "tom.h" //#include "memory.h" #include "wavetable.h" //Note that 44100 Hz requires samples every 22.675737 usec. -#define NEW_TIMER_SYSTEM //#define JERRY_DEBUG /*static*/ uint8 jerry_ram_8[0x10000]; @@ -191,6 +192,7 @@ uint32 jerryIntPending; static uint16 jerryInterruptMask = 0; static uint16 jerryPendingInterrupt = 0; + // Private function prototypes void JERRYResetPIT1(void); @@ -201,100 +203,6 @@ void JERRYPIT1Callback(void); void JERRYPIT2Callback(void); void JERRYI2SCallback(void); -//This approach is probably wrong, since the timer is continuously counting down, though -//it might only be a problem if the # of interrupts generated is greater than 1--the M68K's -//timeslice should be running during that phase... (The DSP needs to be aware of this!) - -//This is only used by the old system, so once the new timer system is working this -//should be safe to nuke. -void JERRYI2SExec(uint32 cycles) -{ -#ifndef NEW_TIMER_SYSTEM -#warning "externed var in source--should be in header file. !!! FIX !!!" - extern uint16 serialMode; // From DAC.CPP - if (serialMode & 0x01) // INTERNAL flag (JERRY is master) - { - - // Why is it called this? Instead of SCLK? Shouldn't this be read from DAC.CPP??? -//Yes, it should. !!! FIX !!! - JERRYI2SInterruptDivide &= 0xFF; - - if (JERRYI2SInterruptTimer == -1) - { - // We don't have to divide the RISC clock rate by this--the reason is a bit - // convoluted. Will put explanation here later... -// What's needed here is to find the ratio of the frequency to the number of clock cycles -// in one second. For example, if the sample rate is 44100, we divide the clock rate by -// this: 26590906 / 44100 = 602 cycles. -// Which means, every 602 cycles that go by we have to generate an interrupt. - jerryI2SCycles = 32 * (2 * (JERRYI2SInterruptDivide + 1)); - } - - JERYI2SInterruptTimer -= cycles; - if (JERRYI2SInterruptTimer <= 0) - { -//This is probably wrong as well (i.e., need to check enable lines)... !!! FIX !!! - DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE); - JERRYI2SInterruptTimer += jerryI2SCycles; -#ifdef JERRY_DEBUG - if (JERRYI2SInterruptTimer < 0) - WriteLog("JERRY: Missed generating an interrupt (missed %u)!\n", (-JERRYI2SInterruptTimer / jerryI2SCycles) + 1); -#endif - } - } - else // JERRY is slave to external word clock - { - // This is just a temporary kludge to see if the CD bus mastering works - // I.e., this is totally faked...! -// The whole interrupt system is pretty much borked and is need of an overhaul. -// What we need is a way of handling these interrupts when they happen instead of -// scanline boundaries the way it is now. - JERRYI2SInterruptTimer -= cycles; - if (JERRYI2SInterruptTimer <= 0) - { -//This is probably wrong as well (i.e., need to check enable lines)... !!! FIX !!! [DONE] - if (ButchIsReadyToSend())//Not sure this is right spot to check... - { -// return GetWordFromButchSSI(offset, who); - SetSSIWordsXmittedFromButch(); - DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE); - } - JERRYI2SInterruptTimer += 602; - } - } -#else - RemoveCallback(JERRYI2SCallback); - JERRYI2SCallback(); -#endif -} - -//NOTE: This is only used by the old execution core. Safe to nuke once it's stable. -void JERRYExecPIT(uint32 cycles) -{ -//This is wrong too: Counters are *always* spinning! !!! FIX !!! [DONE] -// if (jerry_timer_1_counter) - jerry_timer_1_counter -= cycles; - - if (jerry_timer_1_counter <= 0) - { -//Also, it can generate a CPU interrupt as well... !!! FIX !!! or does it? Maybe it goes Timer->GPU->CPU? - DSPSetIRQLine(DSPIRQ_TIMER0, ASSERT_LINE); // This does the 'IRQ enabled' checking... -// JERRYResetPIT1(); - jerry_timer_1_counter += (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1); - } - -//This is wrong too: Counters are *always* spinning! !!! FIX !!! [DONE] -// if (jerry_timer_2_counter) - jerry_timer_2_counter -= cycles; - - if (jerry_timer_2_counter <= 0) - { -//Also, it can generate a CPU interrupt as well... !!! FIX !!! or does it? Maybe it goes Timer->GPU->CPU? - DSPSetIRQLine(DSPIRQ_TIMER1, ASSERT_LINE); // This does the 'IRQ enabled' checking... -// JERRYResetPIT2(); - jerry_timer_2_counter += (JERRYPIT2Prescaler + 1) * (JERRYPIT2Divider + 1); - } -} void JERRYResetI2S(void) { @@ -304,82 +212,74 @@ void JERRYResetI2S(void) JERRYI2SInterruptTimer = -1; } + void JERRYResetPIT1(void) { -#ifndef NEW_TIMER_SYSTEM -/* if (!JERRYPIT1Prescaler || !JERRYPIT1Divider) - jerry_timer_1_counter = 0; - else//*/ -//Small problem with this approach: Overflow if both are = $FFFF. !!! FIX !!! - jerry_timer_1_counter = (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1); - -// if (jerry_timer_1_counter) -// WriteLog("jerry: reseting timer 1 to 0x%.8x (%i)\n",jerry_timer_1_counter,jerry_timer_1_counter); - -#else RemoveCallback(JERRYPIT1Callback); if (JERRYPIT1Prescaler | JERRYPIT1Divider) { double usecs = (float)(JERRYPIT1Prescaler + 1) * (float)(JERRYPIT1Divider + 1) * RISC_CYCLE_IN_USEC; - SetCallbackTime(JERRYPIT1Callback, usecs); + SetCallbackTime(JERRYPIT1Callback, usecs, EVENT_JERRY); } -#endif } + void JERRYResetPIT2(void) { -#ifndef NEW_TIMER_SYSTEM -/* if (!JERRYPIT2Prescaler || !JERRYPIT2Divider) - { - jerry_timer_2_counter = 0; - return; - } - else//*/ - jerry_timer_2_counter = (JERRYPIT2Prescaler + 1) * (JERRYPIT2Divider + 1); - -// if (jerry_timer_2_counter) -// WriteLog("jerry: reseting timer 2 to 0x%.8x (%i)\n",jerry_timer_2_counter,jerry_timer_2_counter); - -#else RemoveCallback(JERRYPIT2Callback); if (JERRYPIT1Prescaler | JERRYPIT1Divider) { double usecs = (float)(JERRYPIT2Prescaler + 1) * (float)(JERRYPIT2Divider + 1) * RISC_CYCLE_IN_USEC; - SetCallbackTime(JERRYPIT2Callback, usecs); + SetCallbackTime(JERRYPIT2Callback, usecs, EVENT_JERRY); } -#endif } + +// This is the cause of the regressions in Cybermorph and Missile Command 3D... +// Solution: Probably have to check the DSP enable bit before sending these thru. +//#define JERRY_NO_IRQS void JERRYPIT1Callback(void) { +#ifndef JERRY_NO_IRQS //WriteLog("JERRY: In PIT1 callback, IRQM=$%04X\n", jerryInterruptMask); - if (jerryInterruptMask & IRQ2_TIMER1) // CPU Timer 1 IRQ + if (TOMIRQEnabled(IRQ_DSP)) { + if (jerryInterruptMask & IRQ2_TIMER1) // CPU Timer 1 IRQ + { // Not sure, but I think we don't generate another IRQ if one's already going... // But this seems to work... :-/ - jerryPendingInterrupt |= IRQ2_TIMER1; - m68k_set_irq(2); // Generate 68K IPL 2 + jerryPendingInterrupt |= IRQ2_TIMER1; + m68k_set_irq(2); // Generate 68K IPL 2 + } } +#endif DSPSetIRQLine(DSPIRQ_TIMER0, ASSERT_LINE); // This does the 'IRQ enabled' checking... JERRYResetPIT1(); } + void JERRYPIT2Callback(void) { -//WriteLog("JERRY: In PIT2 callback, IRQM=$%04X\n", jerryInterruptMask); - if (jerryInterruptMask & IRQ2_TIMER2) // CPU Timer 2 IRQ +#ifndef JERRY_NO_IRQS + if (TOMIRQEnabled(IRQ_DSP)) { - jerryPendingInterrupt |= IRQ2_TIMER2; - m68k_set_irq(2); // Generate 68K IPL 2 +//WriteLog("JERRY: In PIT2 callback, IRQM=$%04X\n", jerryInterruptMask); + if (jerryInterruptMask & IRQ2_TIMER2) // CPU Timer 2 IRQ + { + jerryPendingInterrupt |= IRQ2_TIMER2; + m68k_set_irq(2); // Generate 68K IPL 2 + } } +#endif DSPSetIRQLine(DSPIRQ_TIMER1, ASSERT_LINE); // This does the 'IRQ enabled' checking... JERRYResetPIT2(); } + void JERRYI2SCallback(void) { // Why is it called this? Instead of SCLK? Shouldn't this be read from DAC.CPP??? @@ -402,7 +302,7 @@ void JERRYI2SCallback(void) { DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE); // This does the 'IRQ enabled' checking... double usecs = (float)jerryI2SCycles * RISC_CYCLE_IN_USEC; - SetCallbackTime(JERRYI2SCallback, usecs); + SetCallbackTime(JERRYI2SCallback, usecs, EVENT_JERRY); } else // JERRY is slave to external word clock { @@ -434,20 +334,14 @@ void JERRYI2SCallback(void) DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE); } - SetCallbackTime(JERRYI2SCallback, 22.675737); + SetCallbackTime(JERRYI2SCallback, 22.675737, EVENT_JERRY); } } void JERRYInit(void) { -// clock_init(); -// anajoy_init(); JoystickInit(); - DACInit(); -//This should be handled with the cart initialization... -// eeprom_init(); -// memory_malloc_secure((void **)&jerry_ram_8, 0x10000, "JERRY RAM/ROM"); memcpy(&jerry_ram_8[0xD000], waveTableROM, 0x1000); JERRYPIT1Prescaler = 0xFFFF; @@ -456,16 +350,16 @@ void JERRYInit(void) JERRYPIT2Divider = 0xFFFF; jerryInterruptMask = 0x0000; jerryPendingInterrupt = 0x0000; + + DACInit(); } + void JERRYReset(void) { -// clock_reset(); -// anajoy_reset(); JoystickReset(); EepromReset(); JERRYResetI2S(); - DACReset(); memset(jerry_ram_8, 0x00, 0xD000); // Don't clear out the Wavetable ROM...! JERRYPIT1Prescaler = 0xFFFF; @@ -476,19 +370,20 @@ void JERRYReset(void) jerry_timer_2_counter = 0; jerryInterruptMask = 0x0000; jerryPendingInterrupt = 0x0000; + + DACReset(); } + void JERRYDone(void) { WriteLog("JERRY: M68K Interrupt control ($F10020) = %04X\n", GET16(jerry_ram_8, 0x20)); -// memory_free(jerry_ram_8); -// clock_done(); -// anajoy_done(); JoystickDone(); DACDone(); EepromDone(); } + bool JERRYIRQEnabled(int irq) { // Read the word @ $F10020 @@ -496,6 +391,7 @@ bool JERRYIRQEnabled(int irq) return jerryInterruptMask & irq; } + void JERRYSetPendingIRQ(int irq) { // This is the shadow of INT (it's a split RO/WO register) @@ -503,6 +399,7 @@ void JERRYSetPendingIRQ(int irq) jerryPendingInterrupt |= irq; } + // // JERRY byte access (read) // @@ -531,43 +428,7 @@ uint8 JERRYReadByte(uint32 offset, uint32 who/*=UNKNOWN*/) //under the new system... !!! FIX !!! else if ((offset >= 0xF10036) && (offset <= 0xF1003D)) { -#ifndef NEW_TIMER_SYSTEM -// jerry_timer_1_counter = (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1); - uint32 counter1Hi = (jerry_timer_1_counter / (JERRYPIT1Divider + 1)) - 1; - uint32 counter1Lo = (jerry_timer_1_counter % (JERRYPIT1Divider + 1)) - 1; - uint32 counter2Hi = (jerry_timer_2_counter / (JERRYPIT2Divider + 1)) - 1; - uint32 counter2Lo = (jerry_timer_2_counter % (JERRYPIT2Divider + 1)) - 1; - - switch(offset & 0x0F) - { - case 6: -// return JERRYPIT1Prescaler >> 8; - return counter1Hi >> 8; - case 7: -// return JERRYPIT1Prescaler & 0xFF; - return counter1Hi & 0xFF; - case 8: -// return JERRYPIT1Divider >> 8; - return counter1Lo >> 8; - case 9: -// return JERRYPIT1Divider & 0xFF; - return counter1Lo & 0xFF; - case 10: -// return JERRYPIT2Prescaler >> 8; - return counter2Hi >> 8; - case 11: -// return JERRYPIT2Prescaler & 0xFF; - return counter2Hi & 0xFF; - case 12: -// return JERRYPIT2Divider >> 8; - return counter2Lo >> 8; - case 13: -// return JERRYPIT2Divider & 0xFF; - return counter2Lo & 0xFF; - } -#else WriteLog("JERRY: Unhandled timer read (BYTE) at %08X...\n", offset); -#endif } // else if (offset >= 0xF10010 && offset <= 0xF10015) // return clock_byte_read(offset); @@ -581,6 +442,7 @@ WriteLog("JERRY: Unhandled timer read (BYTE) at %08X...\n", offset); return jerry_ram_8[offset & 0xFFFF]; } + // // JERRY word access (read) // @@ -607,32 +469,7 @@ uint16 JERRYReadWord(uint32 offset, uint32 who/*=UNKNOWN*/) //in the jerry_timer_n_counter variables... !!! FIX !!! [DONE] else if ((offset >= 0xF10036) && (offset <= 0xF1003D)) { -#ifndef NEW_TIMER_SYSTEM -// jerry_timer_1_counter = (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1); - uint32 counter1Hi = (jerry_timer_1_counter / (JERRYPIT1Divider + 1)) - 1; - uint32 counter1Lo = (jerry_timer_1_counter % (JERRYPIT1Divider + 1)) - 1; - uint32 counter2Hi = (jerry_timer_2_counter / (JERRYPIT2Divider + 1)) - 1; - uint32 counter2Lo = (jerry_timer_2_counter % (JERRYPIT2Divider + 1)) - 1; - - switch(offset & 0x0F) - { - case 6: -// return JERRYPIT1Prescaler; - return counter1Hi; - case 8: -// return JERRYPIT1Divider; - return counter1Lo; - case 10: -// return JERRYPIT2Prescaler; - return counter2Hi; - case 12: -// return JERRYPIT2Divider; - return counter2Lo; - } - // Unaligned word reads??? -#else WriteLog("JERRY: Unhandled timer read (WORD) at %08X...\n", offset); -#endif } // else if ((offset >= 0xF10010) && (offset <= 0xF10015)) // return clock_word_read(offset); @@ -655,6 +492,7 @@ WriteLog("JERRY: Unhandled timer read (WORD) at %08X...\n", offset); return ((uint16)jerry_ram_8[offset+0] << 8) | jerry_ram_8[offset+1]; } + // // JERRY byte access (write) // @@ -684,12 +522,8 @@ void JERRYWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/) JERRYI2SInterruptDivide = (JERRYI2SInterruptDivide & 0xFF00) | (uint32)data; JERRYI2SInterruptTimer = -1; -#ifndef NEW_TIMER_SYSTEM - jerry_i2s_exec(0); -#else RemoveCallback(JERRYI2SCallback); JERRYI2SCallback(); -#endif // return; } // LTXD/RTXD/SCLK/SMODE $F1A148/4C/50/54 (really 16-bit registers...) @@ -700,44 +534,7 @@ void JERRYWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/) } else if (offset >= 0xF10000 && offset <= 0xF10007) { -#ifndef NEW_TIMER_SYSTEM - switch (offset & 0x07) - { - case 0: - JERRYPIT1Prescaler = (JERRYPIT1Prescaler & 0x00FF) | (data << 8); - JERRYResetPIT1(); - break; - case 1: - JERRYPIT1Prescaler = (JERRYPIT1Prescaler & 0xFF00) | data; - JERRYResetPIT1(); - break; - case 2: - JERRYPIT1Divider = (JERRYPIT1Divider & 0x00FF) | (data << 8); - JERRYResetPIT1(); - break; - case 3: - JERRYPIT1Divider = (JERRYPIT1Divider & 0xFF00) | data; - JERRYResetPIT1(); - break; - case 4: - JERRYPIT2Prescaler = (JERRYPIT2Prescaler & 0x00FF) | (data << 8); - JERRYResetPIT2(); - break; - case 5: - JERRYPIT2Prescaler = (JERRYPIT2Prescaler & 0xFF00) | data; - JERRYResetPIT2(); - break; - case 6: - JERRYPIT2Divider = (JERRYPIT2Divider & 0x00FF) | (data << 8); - JERRYResetPIT2(); - break; - case 7: - JERRYPIT2Divider = (JERRYPIT2Divider & 0xFF00) | data; - JERRYResetPIT2(); - } -#else WriteLog("JERRY: Unhandled timer write (BYTE) at %08X...\n", offset); -#endif return; } /* else if ((offset >= 0xF10010) && (offset <= 0xF10015)) @@ -782,6 +579,7 @@ WriteLog("JERRY: Unhandled timer write (BYTE) at %08X...\n", offset); jerry_ram_8[offset & 0xFFFF] = data; } + // // JERRY word access (write) // @@ -805,8 +603,15 @@ else if (offset == 0xF10012) WriteLog("JERRY: CLK2 word written by %s: %u\n", whoName[who], data); else if (offset == 0xF10014) WriteLog("JERRY: CLK3 word written by %s: %u\n", whoName[who], data); -//else if (offset == 0xF10020) -// WriteLog("JERRY: JINTCTRL word written by %s: $%04X\n", whoName[who], data); +//else if (offset == 0xF1A100) +// WriteLog("JERRY: D_FLAGS word written by %s: %u\n", whoName[who], data); +//else if (offset == 0xF1A102) +// WriteLog("JERRY: D_FLAGS+2 word written by %s: %u\n", whoName[who], data); +else if (offset == 0xF10020) + WriteLog("JERRY: JINTCTRL word written by %s: $%04X (%s%s%s%s%s%s)\n", whoName[who], data, + (data & 0x01 ? "Extrnl " : ""), (data & 0x02 ? "DSP " : ""), + (data & 0x04 ? "Timer0 " : ""), (data & 0x08 ? "Timer1 " : ""), + (data & 0x10 ? "ASI " : ""), (data & 0x20 ? "I2S " : "")); #endif if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20)) @@ -822,16 +627,12 @@ else if (offset == 0xF10014) //NOTE: This should be taken care of in DAC... else if (offset == 0xF1A152) // Bottom half of SCLK ($F1A150) { - WriteLog("JERRY: Writing %04X to SCLK (by %s)...\n", data, whoName[who]); + WriteLog("JERRY: Writing $%X to SCLK (by %s)...\n", data, whoName[who]); //This should *only* be enabled when SMODE has its INTERNAL bit set! !!! FIX !!! JERRYI2SInterruptDivide = (uint8)data; JERRYI2SInterruptTimer = -1; -#ifndef NEW_TIMER_SYSTEM - jerry_i2s_exec(0); -#else RemoveCallback(JERRYI2SCallback); JERRYI2SCallback(); -#endif DACWriteWord(offset, data, who); return; @@ -844,8 +645,6 @@ else if (offset == 0xF10014) } else if (offset >= 0xF10000 && offset <= 0xF10007) { -//#ifndef NEW_TIMER_SYSTEM -#if 1 switch(offset & 0x07) { case 0: @@ -865,9 +664,7 @@ else if (offset == 0xF10014) JERRYResetPIT2(); } // Need to handle (unaligned) cases??? -#else -WriteLog("JERRY: Unhandled timer write %04X (WORD) at %08X by %s...\n", data, offset, whoName[who]); -#endif + return; } /* else if (offset >= 0xF10010 && offset < 0xF10016) @@ -909,3 +706,15 @@ WriteLog("JERRY: Unhandled timer write %04X (WORD) at %08X by %s...\n", data, of jerry_ram_8[(offset+0) & 0xFFFF] = (data >> 8) & 0xFF; jerry_ram_8[(offset+1) & 0xFFFF] = data & 0xFF; } + +int JERRYGetPIT1Frequency(void) +{ + int systemClockFrequency = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL); + return systemClockFrequency / ((JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1)); +} + +int JERRYGetPIT2Frequency(void) +{ + int systemClockFrequency = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL); + return systemClockFrequency / ((JERRYPIT2Prescaler + 1) * (JERRYPIT2Divider + 1)); +}