// 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, }; // vcounter values for PicoFrameSimple const unsigned short vcounts[] = { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 31, 31, 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 40, 40, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 48, 48, 49, 49, 50, 50, 51, 52, 52, 53, 53, 54, 54, 55, 55, 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 62, 62, 63, 63, 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 80, 80, 81, 81, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 88, 88, 89, 89, 90, 90, 91, 91, 92, 93, 93, 94, 94, 95, 95, 96, 96, 97, 97, 98, 98, 99, 99,100, 100,101,101,102,102,103,104,104,105,105,106,106,107,107,108,108, 109,109,110,110,111,111,112,112,113,114,114,115,115,116,116,117, 117,118,118,119,119,120,120,121,121,122,122,123,124,124,125,125, 126,126,127,127,128,128,129,129,130,130,131,131,132,132,133,133, 134,135,135,136,136,137,137,138,138,139,139,140,140,141,141,142, 142,143,143,144,145,145,146,146,147,147,148,148,149,149,150,150, 151,151,152,152,153,153,154,155,155,156,156,157,157,158,158,159, 159,160,160,161,161,162,162,163,163,164,164,165,166,166,167,167, 168,168,169,169,170,170,171,171,172,172,173,173,174,174,175,176, 176,177,177,178,178,179,179,180,180,181,181,182,182,183,183,184, 184,185,186,186,187,187,188,188,189,189,190,190,191,191,192,192, 193,193,194,194,195,195,196,197,197,198,198,199,199,200,200,201, 201,202,202,203,203,204,204,205,205,206,207,207,208,208,209,209, 210,210,211,211,212,212,213,213,214,214,215,215,216,217,217,218, 218,219,219,220,220,221,221,222,222,223,223,224,224,225,225,226, 226,227,228,228,229,229,230,230,231,231,232,232,233,233,234,234, 235,235,236,236,237,238,238,239,239,240,240,241,241,242,242,243, 243,244,244,245,245,246,246,247,248,248,249,249,250,250,251,251, 252,252,253,253,254,254,255,255,256,256,257,257,258,259,259,260, 260,261,261,262,262,263,263,264,264,265,265,266,266,267,267,268, 269,269,270,270,271,271,272,272,273,273,274,274,275,275,276,276, 277,277,278,279,279,280,280,281,281,282,282,283,283,284,284,285, 285,286,286,287,287,288,288,289,290,290,291,291,292,292,293,293, 294,294,295,295,296,296,297,297,298,298,299,300,300,301,301,302, 302,303,303,304,304,305,305,306,306,307,307,308,308,309,310,310, 311,311,311,311, }; // rarely used EEPROM SRAM code // known games which use this: // Wonder Boy in Monster World, Megaman - The Wily Wars (X24C01, 128 bytes) // NFL Quarterback Club*, Frank Thomas Big Hurt Baseball (X24C04?) // College Slam, Blockbuster World Video Game Championship II, NBA Jam (X24C04?) // HardBall '95 // the above sports games use addr 0x200000 for SCL line (handled in Memory.c) unsigned int lastSSRamWrite = 0xffff0000; // sram_reg: LAtd sela (L=pending SCL, A=pending SDA, t=type(1==uses 0x200000 for SCL and 2K bytes), // 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.sram_addr, scyc = Pico.m.sram_cycle, ssa = Pico.m.sram_slave; //dprintf("[%02x]", d); sreg |= saddr&0xc000; // we store word count in add reg: dw?a aaaa ... (d=word count detected, w=words(0==use 2 words, else 1)) 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 //dprintf("-start-"); if(!(sreg&0x8000) && scyc >= 9) { if(scyc != 28) sreg |= 0x4000; // 1 word //dprintf("detected word count: %i", scyc==28 ? 2 : 1); sreg |= 0x8000; } //saddr = 0; scyc = 0; sreg |= 8; } else if(!(sreg & 1) && (d&1)) { // SDA went high == stop command //dprintf("-stop-"); sreg &= ~8; } } else if((sreg & 8) && !(sreg & 2) && (d&2)) { // we are started and SCL went high - next cycle scyc++; // pre-increment if(sreg & 0x20) { // X24C02+ if((ssa&1) && scyc == 18) { scyc = 9; saddr++; // next address in read mode if(sreg&0x4000) saddr&=0xff; else saddr&=0x1fff; // mask } else if((sreg&0x4000) && 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 } } //dprintf("scyc: %i", scyc); } else if((sreg & 8) && (sreg & 2) && !(d&2)) { // we are started and SCL went low (falling edge) if(sreg & 0x20) { // X24C02+ if(scyc == 9 || scyc == 18 || scyc == 27); // ACK cycles else if( (!(sreg&0x4000) && scyc > 27) || ((sreg&0x4000) && 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 //dprintf("w done: %02x; addr inc: %x", *pm, saddr); } SRam.changed = 1; } } else if(scyc > 9) { if(!(ssa&1)) { // we latch another addr bit saddr<<=1; if(sreg&0x4000) saddr&=0xff; else saddr&=0x1fff; // mask saddr|=d&1; //if(scyc==17||scyc==26) dprintf("addr reg done: %x", saddr); } } else { // slave address ssa<<=1; ssa|=d&1; //if(scyc==8) dprintf("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 //dprintf("addr inc: %x", saddr>>1); } SRam.changed = 1; } } else { // we latch another addr bit saddr<<=1; saddr|=d&1; saddr&=0xff; //if(scyc==8) dprintf("addr done: %x", saddr>>1); } } } sreg &= ~3; sreg |= d&3; // remember SCL and SDA Pico.m.sram_reg = (unsigned char) sreg; Pico.m.sram_addr = (unsigned short)(saddr|(sreg&0xc000)); Pico.m.sram_cycle= (unsigned char) scyc; Pico.m.sram_slave= (unsigned char) ssa; } PICO_INTERNAL_ASM unsigned int SRAMReadEEPROM(void) { unsigned int shift, d=0; unsigned int sreg, saddr, scyc, ssa; // flush last pending write SRAMWriteEEPROM(Pico.m.sram_reg>>6); sreg = Pico.m.sram_reg; saddr = Pico.m.sram_addr&0x1fff; scyc = Pico.m.sram_cycle; ssa = Pico.m.sram_slave; // if(!(sreg & 2) && (sreg&0x80)) scyc++; // take care of raising edge now to compensate lag if(SekCyclesDoneT()-lastSSRamWrite < 46) { // data was just written, there was no time to respond (used by sports games) d = (sreg>>6)&1; } else if((sreg & 8) && scyc > 9 && scyc != 18 && scyc != 27) { // started and first command word received shift = 17-scyc; if(sreg & 0x20) { // X24C02+ if(ssa&1) { //dprintf("read: addr %02x, cycle %i, reg %02x", saddr, scyc, sreg); d = (SRam.data[saddr]>>shift)&1; } } else { // X24C01 if(saddr&1) { d = (SRam.data[saddr>>1]>>shift)&1; } } } //else dprintf("r ack"); return d; } PICO_INTERNAL void SRAMUpdPending(unsigned int a, unsigned int d) { unsigned int sreg = Pico.m.sram_reg; if(!(a&1)) sreg|=0x20; if(sreg&0x20) { // address through 0x200000 if(!(a&1)) { sreg&=~0x80; sreg|=d<<7; } else { sreg&=~0x40; sreg|=(d<<6)&0x40; } } else { sreg&=~0xc0; sreg|=d<<6; } Pico.m.sram_reg = (unsigned char) sreg; } #ifndef _ASM_MISC_C PICO_INTERNAL_ASM void memcpy16(unsigned short *dest, unsigned short *src, int count) { 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]; } PICO_INTERNAL_ASM void memcpy32(int *dest, int *src, int count) { while (count--) *dest++ = *src++; } PICO_INTERNAL_ASM void memset32(int *dest, int c, int count) { while (count--) *dest++ = c; } #endif