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- // This is part of Pico Library
- // (c) Copyright 2006 notaz, All rights reserved.
- // Free for non-commercial use.
- // For commercial use, separate licencing terms must be obtained.
- #include "PicoInt.h"
- // H-counter table for hvcounter reads in 40col mode
- // based on Gens code
- const unsigned char hcounts_40[] = {
- 0x07,0x07,0x08,0x08,0x08,0x09,0x09,0x0a,0x0a,0x0b,0x0b,0x0b,0x0c,0x0c,0x0d,0x0d,
- 0x0e,0x0e,0x0e,0x0f,0x0f,0x10,0x10,0x10,0x11,0x11,0x12,0x12,0x13,0x13,0x13,0x14,
- 0x14,0x15,0x15,0x15,0x16,0x16,0x17,0x17,0x18,0x18,0x18,0x19,0x19,0x1a,0x1a,0x1b,
- 0x1b,0x1b,0x1c,0x1c,0x1d,0x1d,0x1d,0x1e,0x1e,0x1f,0x1f,0x20,0x20,0x20,0x21,0x21,
- 0x22,0x22,0x23,0x23,0x23,0x24,0x24,0x25,0x25,0x25,0x26,0x26,0x27,0x27,0x28,0x28,
- 0x28,0x29,0x29,0x2a,0x2a,0x2a,0x2b,0x2b,0x2c,0x2c,0x2d,0x2d,0x2d,0x2e,0x2e,0x2f,
- 0x2f,0x30,0x30,0x30,0x31,0x31,0x32,0x32,0x32,0x33,0x33,0x34,0x34,0x35,0x35,0x35,
- 0x36,0x36,0x37,0x37,0x38,0x38,0x38,0x39,0x39,0x3a,0x3a,0x3a,0x3b,0x3b,0x3c,0x3c,
- 0x3d,0x3d,0x3d,0x3e,0x3e,0x3f,0x3f,0x3f,0x40,0x40,0x41,0x41,0x42,0x42,0x42,0x43,
- 0x43,0x44,0x44,0x45,0x45,0x45,0x46,0x46,0x47,0x47,0x47,0x48,0x48,0x49,0x49,0x4a,
- 0x4a,0x4a,0x4b,0x4b,0x4c,0x4c,0x4d,0x4d,0x4d,0x4e,0x4e,0x4f,0x4f,0x4f,0x50,0x50,
- 0x51,0x51,0x52,0x52,0x52,0x53,0x53,0x54,0x54,0x55,0x55,0x55,0x56,0x56,0x57,0x57,
- 0x57,0x58,0x58,0x59,0x59,0x5a,0x5a,0x5a,0x5b,0x5b,0x5c,0x5c,0x5c,0x5d,0x5d,0x5e,
- 0x5e,0x5f,0x5f,0x5f,0x60,0x60,0x61,0x61,0x62,0x62,0x62,0x63,0x63,0x64,0x64,0x64,
- 0x65,0x65,0x66,0x66,0x67,0x67,0x67,0x68,0x68,0x69,0x69,0x6a,0x6a,0x6a,0x6b,0x6b,
- 0x6c,0x6c,0x6c,0x6d,0x6d,0x6e,0x6e,0x6f,0x6f,0x6f,0x70,0x70,0x71,0x71,0x71,0x72,
- 0x72,0x73,0x73,0x74,0x74,0x74,0x75,0x75,0x76,0x76,0x77,0x77,0x77,0x78,0x78,0x79,
- 0x79,0x79,0x7a,0x7a,0x7b,0x7b,0x7c,0x7c,0x7c,0x7d,0x7d,0x7e,0x7e,0x7f,0x7f,0x7f,
- 0x80,0x80,0x81,0x81,0x81,0x82,0x82,0x83,0x83,0x84,0x84,0x84,0x85,0x85,0x86,0x86,
- 0x86,0x87,0x87,0x88,0x88,0x89,0x89,0x89,0x8a,0x8a,0x8b,0x8b,0x8c,0x8c,0x8c,0x8d,
- 0x8d,0x8e,0x8e,0x8e,0x8f,0x8f,0x90,0x90,0x91,0x91,0x91,0x92,0x92,0x93,0x93,0x94,
- 0x94,0x94,0x95,0x95,0x96,0x96,0x96,0x97,0x97,0x98,0x98,0x99,0x99,0x99,0x9a,0x9a,
- 0x9b,0x9b,0x9b,0x9c,0x9c,0x9d,0x9d,0x9e,0x9e,0x9e,0x9f,0x9f,0xa0,0xa0,0xa1,0xa1,
- 0xa1,0xa2,0xa2,0xa3,0xa3,0xa3,0xa4,0xa4,0xa5,0xa5,0xa6,0xa6,0xa6,0xa7,0xa7,0xa8,
- 0xa8,0xa9,0xa9,0xa9,0xaa,0xaa,0xab,0xab,0xab,0xac,0xac,0xad,0xad,0xae,0xae,0xae,
- 0xaf,0xaf,0xb0,0xb0,
- 0xe4,0xe4,0xe4,0xe5,0xe5,0xe6,0xe6,0xe6,0xe7,0xe7,0xe8,0xe8,0xe9,0xe9,0xe9,0xea,
- 0xea,0xeb,0xeb,0xeb,0xec,0xec,0xed,0xed,0xee,0xee,0xee,0xef,0xef,0xf0,0xf0,0xf1,
- 0xf1,0xf1,0xf2,0xf2,0xf3,0xf3,0xf3,0xf4,0xf4,0xf5,0xf5,0xf6,0xf6,0xf6,0xf7,0xf7,
- 0xf8,0xf8,0xf9,0xf9,0xf9,0xfa,0xfa,0xfb,0xfb,0xfb,0xfc,0xfc,0xfd,0xfd,0xfe,0xfe,
- 0xfe,0xff,0xff,0x00,0x00,0x00,0x01,0x01,0x02,0x02,0x03,0x03,0x03,0x04,0x04,0x05,
- 0x05,0x06,0x06,0x06,
- 0x07,0x07,0x08,0x08,0x08,0x09,0x09,0x0a,0x0a,0x0b,0x0b,0x0b,0x0c,0x0c,0x0d,0x0d,
- 0x0e,0x0e,0x0e,0x0f,0x0f,0x10,0x10,0x10,
- };
- // H-counter table for hvcounter reads in 32col mode
- const unsigned char hcounts_32[] = {
- 0x05,0x05,0x05,0x06,0x06,0x07,0x07,0x07,0x08,0x08,0x08,0x09,0x09,0x09,0x0a,0x0a,
- 0x0a,0x0b,0x0b,0x0b,0x0c,0x0c,0x0c,0x0d,0x0d,0x0d,0x0e,0x0e,0x0f,0x0f,0x0f,0x10,
- 0x10,0x10,0x11,0x11,0x11,0x12,0x12,0x12,0x13,0x13,0x13,0x14,0x14,0x14,0x15,0x15,
- 0x15,0x16,0x16,0x17,0x17,0x17,0x18,0x18,0x18,0x19,0x19,0x19,0x1a,0x1a,0x1a,0x1b,
- 0x1b,0x1b,0x1c,0x1c,0x1c,0x1d,0x1d,0x1d,0x1e,0x1e,0x1f,0x1f,0x1f,0x20,0x20,0x20,
- 0x21,0x21,0x21,0x22,0x22,0x22,0x23,0x23,0x23,0x24,0x24,0x24,0x25,0x25,0x26,0x26,
- 0x26,0x27,0x27,0x27,0x28,0x28,0x28,0x29,0x29,0x29,0x2a,0x2a,0x2a,0x2b,0x2b,0x2b,
- 0x2c,0x2c,0x2c,0x2d,0x2d,0x2e,0x2e,0x2e,0x2f,0x2f,0x2f,0x30,0x30,0x30,0x31,0x31,
- 0x31,0x32,0x32,0x32,0x33,0x33,0x33,0x34,0x34,0x34,0x35,0x35,0x36,0x36,0x36,0x37,
- 0x37,0x37,0x38,0x38,0x38,0x39,0x39,0x39,0x3a,0x3a,0x3a,0x3b,0x3b,0x3b,0x3c,0x3c,
- 0x3d,0x3d,0x3d,0x3e,0x3e,0x3e,0x3f,0x3f,0x3f,0x40,0x40,0x40,0x41,0x41,0x41,0x42,
- 0x42,0x42,0x43,0x43,0x43,0x44,0x44,0x45,0x45,0x45,0x46,0x46,0x46,0x47,0x47,0x47,
- 0x48,0x48,0x48,0x49,0x49,0x49,0x4a,0x4a,0x4a,0x4b,0x4b,0x4b,0x4c,0x4c,0x4d,0x4d,
- 0x4d,0x4e,0x4e,0x4e,0x4f,0x4f,0x4f,0x50,0x50,0x50,0x51,0x51,0x51,0x52,0x52,0x52,
- 0x53,0x53,0x53,0x54,0x54,0x55,0x55,0x55,0x56,0x56,0x56,0x57,0x57,0x57,0x58,0x58,
- 0x58,0x59,0x59,0x59,0x5a,0x5a,0x5a,0x5b,0x5b,0x5c,0x5c,0x5c,0x5d,0x5d,0x5d,0x5e,
- 0x5e,0x5e,0x5f,0x5f,0x5f,0x60,0x60,0x60,0x61,0x61,0x61,0x62,0x62,0x62,0x63,0x63,
- 0x64,0x64,0x64,0x65,0x65,0x65,0x66,0x66,0x66,0x67,0x67,0x67,0x68,0x68,0x68,0x69,
- 0x69,0x69,0x6a,0x6a,0x6a,0x6b,0x6b,0x6c,0x6c,0x6c,0x6d,0x6d,0x6d,0x6e,0x6e,0x6e,
- 0x6f,0x6f,0x6f,0x70,0x70,0x70,0x71,0x71,0x71,0x72,0x72,0x72,0x73,0x73,0x74,0x74,
- 0x74,0x75,0x75,0x75,0x76,0x76,0x76,0x77,0x77,0x77,0x78,0x78,0x78,0x79,0x79,0x79,
- 0x7a,0x7a,0x7b,0x7b,0x7b,0x7c,0x7c,0x7c,0x7d,0x7d,0x7d,0x7e,0x7e,0x7e,0x7f,0x7f,
- 0x7f,0x80,0x80,0x80,0x81,0x81,0x81,0x82,0x82,0x83,0x83,0x83,0x84,0x84,0x84,0x85,
- 0x85,0x85,0x86,0x86,0x86,0x87,0x87,0x87,0x88,0x88,0x88,0x89,0x89,0x89,0x8a,0x8a,
- 0x8b,0x8b,0x8b,0x8c,0x8c,0x8c,0x8d,0x8d,0x8d,0x8e,0x8e,0x8e,0x8f,0x8f,0x8f,0x90,
- 0x90,0x90,0x91,0x91,
- 0xe8,0xe8,0xe8,0xe9,0xe9,0xe9,0xea,0xea,0xea,0xeb,0xeb,0xeb,0xec,0xec,0xec,0xed,
- 0xed,0xed,0xee,0xee,0xee,0xef,0xef,0xf0,0xf0,0xf0,0xf1,0xf1,0xf1,0xf2,0xf2,0xf2,
- 0xf3,0xf3,0xf3,0xf4,0xf4,0xf4,0xf5,0xf5,0xf5,0xf6,0xf6,0xf6,0xf7,0xf7,0xf8,0xf8,
- 0xf8,0xf9,0xf9,0xf9,0xfa,0xfa,0xfa,0xfb,0xfb,0xfb,0xfc,0xfc,0xfc,0xfd,0xfd,0xfd,
- 0xfe,0xfe,0xfe,0xff,0xff,0x00,0x00,0x00,0x01,0x01,0x01,0x02,0x02,0x02,0x03,0x03,
- 0x03,0x04,0x04,0x04,
- 0x05,0x05,0x05,0x06,0x06,0x07,0x07,0x07,0x08,0x08,0x08,0x09,0x09,0x09,0x0a,0x0a,
- 0x0a,0x0b,0x0b,0x0b,0x0c,0x0c,0x0c,0x0d,
- };
- // rarely used EEPROM SRAM code
- // known games which use this:
- // Wonder Boy in Monster World, Megaman - The Wily Wars (X24C01, 128 bytes)
- // (see Genesis Plus for Wii/GC code and docs for info,
- // full game list and better code).
- unsigned int lastSSRamWrite = 0xffff0000;
- // sram_reg: LAtd sela (L=pending SCL, A=pending SDA, t=(unused),
- // d=SRAM was detected (header or by access), s=started, e=save is EEPROM, l=old SCL, a=old SDA)
- PICO_INTERNAL void SRAMWriteEEPROM(unsigned int d) // ???? ??la (l=SCL, a=SDA)
- {
- unsigned int sreg = Pico.m.sram_reg, saddr = Pico.m.eeprom_addr, scyc = Pico.m.eeprom_cycle, ssa = Pico.m.eeprom_slave;
- elprintf(EL_EEPROM, "eeprom: scl/sda: %i/%i -> %i/%i, newtime=%i", (sreg&2)>>1, sreg&1,
- (d&2)>>1, d&1, SekCyclesDoneT()-lastSSRamWrite);
- saddr&=0x1fff;
- if(sreg & d & 2) {
- // SCL was and is still high..
- if((sreg & 1) && !(d&1)) {
- // ..and SDA went low, means it's a start command, so clear internal addr reg and clock counter
- elprintf(EL_EEPROM, "eeprom: -start-");
- //saddr = 0;
- scyc = 0;
- sreg |= 8;
- } else if(!(sreg & 1) && (d&1)) {
- // SDA went high == stop command
- elprintf(EL_EEPROM, "eeprom: -stop-");
- sreg &= ~8;
- }
- }
- else if((sreg & 8) && !(sreg & 2) && (d&2))
- {
- // we are started and SCL went high - next cycle
- scyc++; // pre-increment
- if(SRam.eeprom_type) {
- // X24C02+
- if((ssa&1) && scyc == 18) {
- scyc = 9;
- saddr++; // next address in read mode
- /*if(SRam.eeprom_type==2) saddr&=0xff; else*/ saddr&=0x1fff; // mask
- }
- else if(SRam.eeprom_type == 2 && scyc == 27) scyc = 18;
- else if(scyc == 36) scyc = 27;
- } else {
- // X24C01
- if(scyc == 18) {
- scyc = 9; // wrap
- if(saddr&1) { saddr+=2; saddr&=0xff; } // next addr in read mode
- }
- }
- elprintf(EL_EEPROM, "eeprom: scyc: %i", scyc);
- }
- else if((sreg & 8) && (sreg & 2) && !(d&2))
- {
- // we are started and SCL went low (falling edge)
- if(SRam.eeprom_type) {
- // X24C02+
- if(scyc == 9 || scyc == 18 || scyc == 27); // ACK cycles
- else if( (SRam.eeprom_type == 3 && scyc > 27) || (SRam.eeprom_type == 2 && scyc > 18) ) {
- if(!(ssa&1)) {
- // data write
- unsigned char *pm=SRam.data+saddr;
- *pm <<= 1; *pm |= d&1;
- if(scyc == 26 || scyc == 35) {
- saddr=(saddr&~0xf)|((saddr+1)&0xf); // only 4 (?) lowest bits are incremented
- elprintf(EL_EEPROM, "eeprom: write done, addr inc to: %x, last byte=%02x", saddr, *pm);
- }
- SRam.changed = 1;
- }
- } else if(scyc > 9) {
- if(!(ssa&1)) {
- // we latch another addr bit
- saddr<<=1;
- if(SRam.eeprom_type == 2) saddr&=0xff; else saddr&=0x1fff; // mask
- saddr|=d&1;
- if(scyc==17||scyc==26) {
- elprintf(EL_EEPROM, "eeprom: addr reg done: %x", saddr);
- if(scyc==17&&SRam.eeprom_type==2) { saddr&=0xff; saddr|=(ssa<<7)&0x700; } // add device bits too
- }
- }
- } else {
- // slave address
- ssa<<=1; ssa|=d&1;
- if(scyc==8) elprintf(EL_EEPROM, "eeprom: slave done: %x", ssa);
- }
- } else {
- // X24C01
- if(scyc == 9); // ACK cycle, do nothing
- else if(scyc > 9) {
- if(!(saddr&1)) {
- // data write
- unsigned char *pm=SRam.data+(saddr>>1);
- *pm <<= 1; *pm |= d&1;
- if(scyc == 17) {
- saddr=(saddr&0xf9)|((saddr+2)&6); // only 2 lowest bits are incremented
- elprintf(EL_EEPROM, "eeprom: write done, addr inc to: %x, last byte=%02x", saddr>>1, *pm);
- }
- SRam.changed = 1;
- }
- } else {
- // we latch another addr bit
- saddr<<=1; saddr|=d&1; saddr&=0xff;
- if(scyc==8) elprintf(EL_EEPROM, "eeprom: addr done: %x", saddr>>1);
- }
- }
- }
- sreg &= ~3; sreg |= d&3; // remember SCL and SDA
- Pico.m.sram_reg = (unsigned char) sreg;
- Pico.m.eeprom_cycle= (unsigned char) scyc;
- Pico.m.eeprom_slave= (unsigned char) ssa;
- Pico.m.eeprom_addr = (unsigned short)saddr;
- }
- PICO_INTERNAL_ASM unsigned int SRAMReadEEPROM(void)
- {
- unsigned int shift, d;
- unsigned int sreg, saddr, scyc, ssa, interval;
- // flush last pending write
- SRAMWriteEEPROM(Pico.m.sram_reg>>6);
- sreg = Pico.m.sram_reg; saddr = Pico.m.eeprom_addr&0x1fff; scyc = Pico.m.eeprom_cycle; ssa = Pico.m.eeprom_slave;
- interval = SekCyclesDoneT()-lastSSRamWrite;
- d = (sreg>>6)&1; // use SDA as "open bus"
- // NBA Jam is nasty enough to read <before> raising the SCL and starting the new cycle.
- // this is probably valid because data changes occur while SCL is low and data can be read
- // before it's actual cycle begins.
- if (!(sreg&0x80) && interval >= 24) {
- elprintf(EL_EEPROM, "eeprom: early read, cycles=%i", interval);
- scyc++;
- }
- if (!(sreg & 8)); // not started, use open bus
- else if (scyc == 9 || scyc == 18 || scyc == 27) {
- elprintf(EL_EEPROM, "eeprom: r ack");
- d = 0;
- } else if (scyc > 9 && scyc < 18) {
- // started and first command word received
- shift = 17-scyc;
- if (SRam.eeprom_type) {
- // X24C02+
- if (ssa&1) {
- elprintf(EL_EEPROM, "eeprom: read: addr %02x, cycle %i, reg %02x", saddr, scyc, sreg);
- if (shift==0) elprintf(EL_EEPROM, "eeprom: read done, byte %02x", SRam.data[saddr]);
- d = (SRam.data[saddr]>>shift)&1;
- }
- } else {
- // X24C01
- if (saddr&1) {
- elprintf(EL_EEPROM, "eeprom: read: addr %02x, cycle %i, reg %02x", saddr>>1, scyc, sreg);
- if (shift==0) elprintf(EL_EEPROM, "eeprom: read done, byte %02x", SRam.data[saddr>>1]);
- d = (SRam.data[saddr>>1]>>shift)&1;
- }
- }
- }
- return (d << SRam.eeprom_bit_out);
- }
- PICO_INTERNAL void SRAMUpdPending(unsigned int a, unsigned int d)
- {
- unsigned int d1, sreg = Pico.m.sram_reg;
- if (!((SRam.eeprom_abits^a)&1))
- {
- // SCL
- sreg &= ~0x80;
- d1 = (d >> SRam.eeprom_bit_cl) & 1;
- sreg |= d1<<7;
- }
- if (!(((SRam.eeprom_abits>>1)^a)&1))
- {
- // SDA in
- sreg &= ~0x40;
- d1 = (d >> SRam.eeprom_bit_in) & 1;
- sreg |= d1<<6;
- }
- Pico.m.sram_reg = (unsigned char) sreg;
- }
- #ifndef _ASM_MISC_C
- typedef struct
- {
- int b0;
- int b1;
- int b2;
- int b3;
- int b4;
- int b5;
- int b6;
- int b7;
- } intblock;
- PICO_INTERNAL_ASM void memcpy16(unsigned short *dest, unsigned short *src, int count)
- {
- if ((((int)dest | (int)src) & 3) == 0)
- {
- if (count >= 32) {
- memcpy32((int *)dest, (int *)src, count/2);
- count&=1;
- } else {
- for (; count >= 2; count -= 2, dest+=2, src+=2)
- *(int *)dest = *(int *)src;
- }
- }
- while (count--)
- *dest++ = *src++;
- }
- PICO_INTERNAL_ASM void memcpy16bswap(unsigned short *dest, void *src, int count)
- {
- unsigned char *src_ = src;
- for (; count; count--, src_ += 2)
- *dest++ = (src_[0] << 8) | src_[1];
- }
- #ifndef _ASM_MISC_C_AMIPS
- PICO_INTERNAL_ASM void memcpy32(int *dest, int *src, int count)
- {
- intblock *bd = (intblock *) dest, *bs = (intblock *) src;
- for (; count >= sizeof(*bd)/4; count -= sizeof(*bd)/4)
- *bd++ = *bs++;
- dest = (int *)bd; src = (int *)bs;
- while (count--)
- *dest++ = *src++;
- }
- PICO_INTERNAL_ASM void memset32(int *dest, int c, int count)
- {
- for (; count >= 8; count -= 8, dest += 8)
- dest[0] = dest[1] = dest[2] = dest[3] =
- dest[4] = dest[5] = dest[6] = dest[7] = c;
- while (count--)
- *dest++ = c;
- }
- void memset32_uncached(int *dest, int c, int count) { memset32(dest, c, count); }
- #endif
- #endif
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