MMC1: Better work ram and battery saves support for size greater than 8K
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negativeExponent
@@ -22,12 +22,17 @@
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#include "mapinc.h"
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static void GenMMC1Power(void);
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static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery);
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static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int saveram);
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static uint8 DRegs[4];
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static uint8 Buffer, BufferShift;
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static int mmc1opts;
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static uint32 WRAMSIZE = 0;
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/* size of non-battery-backed portion of WRAM */
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/* serves as starting offset for actual save ram from total wram size */
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/* returns 0 if entire work ram is battery backed ram */
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static uint32 NONSaveRAMSIZE = 0;
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static void (*MMC1CHRHook4)(uint32 A, uint8 V);
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static void (*MMC1PRGHook16)(uint32 A, uint8 V);
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@@ -52,9 +57,9 @@ static DECLFR(MAWRAM) {
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}
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static void MMC1CHR(void) {
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if (mmc1opts & 4) {
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if (DRegs[0] & 0x10)
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setprg8r(0x10, 0x6000, (DRegs[1] >> 4) & 1);
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if (WRAMSIZE > 8192) {
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if (WRAMSIZE > 16384)
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setprg8r(0x10, 0x6000, (DRegs[1] >> 2) & 3);
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else
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setprg8r(0x10, 0x6000, (DRegs[1] >> 3) & 1);
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}
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@@ -183,24 +188,44 @@ static void MMC1CMReset(void) {
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MMC1PRG();
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}
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static int DetectMMC1WRAMSize(uint32 crc32) {
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switch (crc32) {
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case 0xc6182024: /* Romance of the 3 Kingdoms */
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case 0x2225c20f: /* Genghis Khan */
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case 0x4642dda6: /* Nobunaga's Ambition */
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case 0x29449ba9: /* "" "" (J) */
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case 0x2b11e0b0: /* "" "" (J) */
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case 0xb8747abf: /* Best Play Pro Yakyuu Special (J) */
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case 0xc9556b36: /* Final Fantasy I & II (J) [!] */
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FCEU_printf(" >8KB external WRAM present. Use UNIF if you hack the ROM image.\n");
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return(16);
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static int DetectMMC1WRAMSize(CartInfo *info, int *saveRAM) {
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int workRAM = 8;
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switch (info->CRC32) {
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case 0xc6182024: /* Romance of the 3 Kingdoms */
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case 0xabbf7217: /* "" "" (J) (PRG0) */
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case 0xccf35c02: /* "" "" (J) (PRG1) */
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case 0x2225c20f: /* Genghis Khan */
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case 0xfb69743a: /* "" "" (J) */
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case 0x4642dda6: /* Nobunaga's Ambition */
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case 0x3f7ad415: /* "" "" (J) (PRG0) */
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case 0x2b11e0b0: /* "" "" (J) (PRG1) */
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*saveRAM = 8;
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workRAM = 16;
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break;
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case 0xb8747abf: /* Best Play Pro Yakyuu Special (J) (PRG0) */
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case 0xc3de7c69: /* "" "" (J) (PRG1) */
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case 0xc9556b36: /* Final Fantasy I & II (J) [!] */
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*saveRAM = 32;
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workRAM = 32;
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break;
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default:
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if (info->iNES2) {
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workRAM = (info->prgRam + info->prgRam_battery) / 1024;
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*saveRAM = info->prgRam_battery / 1024;
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/* we only support sizes between 8K and 32K */
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if (workRAM > 0 && workRAM < 8)
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workRAM = 8;
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if (workRAM > 32)
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workRAM = 32;
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if (*saveRAM > workRAM)
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*saveRAM = workRAM;
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}
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break;
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case 0xd1e50064: /* Dezaemon */
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FCEU_printf(" >8KB external WRAM present. Use UNIF if you hack the ROM image.\n");
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return(32);
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break;
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default: return(8);
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}
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}
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if (workRAM > 8)
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FCEU_printf(" >8KB external WRAM present. Use NES 2.0 if you hack the ROM image.\n");
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return workRAM;
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}
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static uint32 NWCIRQCount;
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@@ -258,17 +283,16 @@ void Mapper105_Init(CartInfo *info) {
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static void GenMMC1Power(void) {
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lreset = 0;
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if (mmc1opts & 1) {
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FCEU_CheatAddRAM(8, 0x6000, WRAM);
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if (mmc1opts & 4)
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FCEU_dwmemset(WRAM, 0, 8192)
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else if (!(mmc1opts & 2))
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FCEU_dwmemset(WRAM, 0, 8192);
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}
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SetWriteHandler(0x8000, 0xFFFF, MMC1_write);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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if (mmc1opts & 1) {
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if (WRAMSIZE) {
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FCEU_CheatAddRAM(8, 0x6000, WRAM);
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/* clear non-battery-backed portion of WRAM */
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if (NONSaveRAMSIZE)
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FCEU_dwmemset(WRAM, 0, NONSaveRAMSIZE);
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SetReadHandler(0x6000, 0x7FFF, MAWRAM);
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SetWriteHandler(0x6000, 0x7FFF, MBWRAM);
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setprg8r(0x10, 0x6000, 0);
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@@ -285,26 +309,24 @@ static void GenMMC1Close(void) {
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CHRRAM = WRAM = NULL;
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}
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static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery) {
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static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int saveram) {
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is155 = 0;
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info->Close = GenMMC1Close;
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MMC1PRGHook16 = MMC1CHRHook4 = 0;
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mmc1opts = 0;
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WRAMSIZE = wram * 1024;
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NONSaveRAMSIZE = (wram - saveram) * 1024;
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PRGmask16[0] &= (prg >> 14) - 1;
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CHRmask4[0] &= (chr >> 12) - 1;
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CHRmask8[0] &= (chr >> 13) - 1;
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if (wram) {
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WRAM = (uint8*)FCEU_gmalloc(wram * 1024);
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mmc1opts |= 1;
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if (wram > 8) mmc1opts |= 4;
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SetupCartPRGMapping(0x10, WRAM, wram * 1024, 1);
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AddExState(WRAM, wram * 1024, 0, "WRAM");
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if (battery) {
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mmc1opts |= 2;
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info->SaveGame[0] = WRAM + ((mmc1opts & 4) ? 8192 : 0);
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info->SaveGameLen[0] = 8192;
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if (WRAMSIZE) {
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WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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if (saveram) {
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info->SaveGame[0] = WRAM + NONSaveRAMSIZE;
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info->SaveGameLen[0] = saveram * 1024;
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}
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}
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if (!chr) {
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@@ -322,13 +344,14 @@ static void GenMMC1Init(CartInfo *info, int prg, int chr, int wram, int battery)
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}
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void Mapper1_Init(CartInfo *info) {
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int ws = DetectMMC1WRAMSize(info->CRC32);
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GenMMC1Init(info, 512, 256, ws, info->battery);
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int bs = info->battery ? 8 : 0;
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int ws = DetectMMC1WRAMSize(info, &bs);
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GenMMC1Init(info, 512, 256, ws, bs);
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}
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/* Same as mapper 1, without respect for WRAM enable bit. */
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void Mapper155_Init(CartInfo *info) {
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GenMMC1Init(info, 512, 256, 8, info->battery);
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GenMMC1Init(info, 512, 256, 8, info->battery ? 8 : 0);
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is155 = 1;
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}
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@@ -340,7 +363,7 @@ void Mapper171_Init(CartInfo *info) {
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}
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void SAROM_Init(CartInfo *info) {
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GenMMC1Init(info, 128, 64, 8, info->battery);
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GenMMC1Init(info, 128, 64, 8, info->battery ? 8 : 0);
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}
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void SBROM_Init(CartInfo *info) {
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@@ -360,7 +383,7 @@ void SGROM_Init(CartInfo *info) {
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}
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void SKROM_Init(CartInfo *info) {
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GenMMC1Init(info, 256, 64, 8, info->battery);
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GenMMC1Init(info, 256, 64, 8, info->battery ? 8 : 0);
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}
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void SLROM_Init(CartInfo *info) {
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@@ -392,11 +415,11 @@ void SHROM_Init(CartInfo *info) {
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/* */
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void SNROM_Init(CartInfo *info) {
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GenMMC1Init(info, 256, 0, 8, info->battery);
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GenMMC1Init(info, 256, 0, 8, info->battery ? 8 : 0);
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}
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void SOROM_Init(CartInfo *info) {
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GenMMC1Init(info, 256, 0, 16, info->battery);
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GenMMC1Init(info, 256, 0, 16, info->battery ? 8 : 0);
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}
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/* ----------------------- FARID_SLROM_8-IN-1 -----------------------*/
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@@ -490,7 +513,7 @@ static void Sync(void) {
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MMC1PRG();
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MMC1CHR();
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MMC1MIRROR();
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} else {
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} else {
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/* Mapper 70 */
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setprg16(0x8000, ((mode & 2) << 1) | ((latch >> 4) & 3));
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setprg16(0xC000, ((mode & 2) << 1) | 3);
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@@ -676,6 +676,7 @@ static BMAPPINGLocal bmap[] = {
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{(uint8_t*)"830928C", 382, Mapper382_Init},
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{(uint8_t*)"NJ064", 534, Mapper534_Init},
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{(uint8_t*)"Kid Ikarus (FDS)", 539, Mapper539_Init},
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/* {(uint8_t*)"5-in-1 (CH-501)", 543, Mapper543_Init}, */
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/* UNIF to NES 2.0 BOARDS */
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@@ -258,5 +258,6 @@ void Mapper534_Init(CartInfo *);
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void Mapper538_Init(CartInfo *);
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void Mapper539_Init(CartInfo *);
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void Mapper541_Init(CartInfo *);
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void Mapper543_Init(CartInfo *);
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#endif
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