COOLBOY fixes and self-writable feature
This commit is contained in:
Alexey 'Cluster' Avdyukhin
parent
35c5fa36c1
commit
d075c2b46a
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@ -21,7 +21,7 @@
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*
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* COOLBOY cartridges use registers at address $6xxx
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* MINDKIDS cartridges use a solder pad labelled "5/6K" to select between $5000 and $6000
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*
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*
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* $xxx0
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* 7 bit 0
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* ---- ----
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@ -76,6 +76,44 @@
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#include "mapinc.h"
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#include "mmc3.h"
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const int ROM_CHIP = 0x00;
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const int WRAM_CHIP = 0x10;
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const int CFI_CHIP = 0x11;
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const int FLASH_CHIP = 0x12;
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const int FLASH_SECTOR_SIZE = 128 * 1024;
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extern uint8* WRAM;
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static uint8* CFI = NULL;
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static uint8* Flash = NULL;
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static uint8 flash_save = 0;
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static uint8 flash_state = 0;
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static uint16 flash_buffer_a[10];
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static uint8 flash_buffer_v[10];
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static uint8 cfi_mode = 0;
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// Macronix 256-mbit memory CFI data
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const uint8 cfi_data[] =
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{
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0x51, 0x52, 0x59, 0x02, 0x00, 0x40, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x27, 0x36, 0x00, 0x00, 0x03,
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0x06, 0x09, 0x13, 0x03, 0x05, 0x03, 0x02, 0x19,
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0x02, 0x00, 0x06, 0x00, 0x01, 0xFF, 0x00, 0x00,
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0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF,
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0x50, 0x52, 0x49, 0x31, 0x33, 0x14, 0x02, 0x01,
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0x00, 0x08, 0x00, 0x00, 0x02, 0x95, 0xA5, 0x05,
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0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
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0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
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};
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static void COOLBOYCW(uint32 A, uint8 V) {
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uint32 mask = 0xFF ^ (EXPREGS[0] & 0x80);
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if (EXPREGS[3] & 0x10) {
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@ -92,7 +130,8 @@ static void COOLBOYCW(uint32 A, uint8 V) {
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| ((EXPREGS[2] & 0x0F) << 3) // 6-3 bits
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| ((A >> 10) & 7) // 2-0 bits
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);
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} else {
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}
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else {
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if (EXPREGS[3] & 0x40) { // Weird mode, again
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int cbase = (MMC3_cmd & 0x80) << 5;
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switch (cbase ^ A) { // Don't even try do understand
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@ -112,6 +151,13 @@ static void COOLBOYPW(uint32 A, uint8 V) {
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uint32 mask = ((0x3F | (EXPREGS[1] & 0x40) | ((EXPREGS[1] & 0x20) << 2)) ^ ((EXPREGS[0] & 0x40) >> 2)) ^ ((EXPREGS[1] & 0x80) >> 2);
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uint32 base = ((EXPREGS[0] & 0x07) >> 0) | ((EXPREGS[1] & 0x10) >> 1) | ((EXPREGS[1] & 0x0C) << 2) | ((EXPREGS[0] & 0x30) << 2);
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if (cfi_mode)
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{
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setprg32r(CFI_CHIP, 0x8000, 0);
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}
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int chip = !flash_save ? ROM_CHIP : FLASH_CHIP;
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// Very weird mode
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// Last banks are first in this mode, ignored when MMC3_cmd&0x40
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if ((EXPREGS[3] & 0x40) && (V >= 0xFE) && !((MMC3_cmd & 0x40) != 0)) {
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@ -123,26 +169,28 @@ static void COOLBOYPW(uint32 A, uint8 V) {
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}
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}
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// Regular MMC3 mode, internal ROM size can be up to 2048kb!
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if (!(EXPREGS[3] & 0x10))
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setprg8(A, (((base << 4) & ~mask)) | (V & mask));
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else { // NROM mode
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if (!(EXPREGS[3] & 0x10)) {
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// Regular MMC3 mode but can be extended to 2MByte
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setprg8r(chip, A, (((base << 4) & ~mask)) | (V & mask));
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}
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else {
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// NROM mode
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mask &= 0xF0;
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uint8 emask;
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if ((((EXPREGS[1] & 2) != 0))) // 32kb mode
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emask = (EXPREGS[3] & 0x0C) | ((A & 0x4000) >> 13);
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else // 16kb mode
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emask = EXPREGS[3] & 0x0E;
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setprg8(A, ((base << 4) & ~mask) // 7-4 bits are from base (see below)
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| (V & mask) // ... or from MM3 internal regs, depends on mask
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| emask // 3-1 (or 3-2 when (EXPREGS[3]&0x0C is set) from EXPREGS[3]
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| ((A & 0x2000) >> 13)); // 0th just as is
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setprg8r(chip, A, ((base << 4) & ~mask) // 7-4 bits are from base (see below)
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| (V & mask) // ... or from MM3 internal regs, depends on mask
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| emask // 3-1 (or 3-2 when (EXPREGS[3]&0x0C is set) from EXPREGS[3]
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| ((A & 0x2000) >> 13)); // 0th just as is
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}
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}
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static DECLFW(COOLBOYWrite) {
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if(A001B & 0x80)
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CartBW(A,V);
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if (A001B & 0x80)
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CartBW(A, V);
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// Deny any further writes when 7th bit is 1 AND 4th is 0
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if ((EXPREGS[3] & 0x90) != 0x80) {
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@ -152,9 +200,107 @@ static DECLFW(COOLBOYWrite) {
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}
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}
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static void COOLBOYReset(void) {
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static DECLFW(MINDKIDSWrite) {
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if (A >= 0x6000) {
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if (A001B & 0x80)
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CartBW(A, V);
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return;
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}
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// Deny any further writes when 7th bit is 1 AND 4th is 0
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if ((EXPREGS[3] & 0x90) != 0x80) {
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EXPREGS[A & 3] = V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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}
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static DECLFR(COOLBOYFlashRead) {
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return CartBR(A);
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}
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static DECLFW(COOLBOYFlashWrite) {
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if (A < 0xC000)
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MMC3_CMDWrite(A, V);
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else
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MMC3_IRQWrite(A, V);
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if (flash_save) {
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if (flash_state < sizeof(flash_buffer_a) / sizeof(flash_buffer_a[0])) {
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flash_buffer_a[flash_state] = A & 0xFFF;
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flash_buffer_v[flash_state] = V;
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flash_state++;
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// enter CFI mode
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if ((flash_state == 1) &&
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(flash_buffer_a[0] == 0x0AAA) && (flash_buffer_v[0] == 0x98)) {
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cfi_mode = 1;
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flash_state = 0;
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FixMMC3PRG(MMC3_cmd);
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}
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// erase sector
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if ((flash_state == 6) &&
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(flash_buffer_a[0] == 0x0AAA) && (flash_buffer_v[0] == 0xAA) &&
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(flash_buffer_a[1] == 0x0555) && (flash_buffer_v[1] == 0x55) &&
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(flash_buffer_a[2] == 0x0AAA) && (flash_buffer_v[2] == 0x80) &&
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(flash_buffer_a[3] == 0x0AAA) && (flash_buffer_v[3] == 0xAA) &&
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(flash_buffer_a[4] == 0x0555) && (flash_buffer_v[4] == 0x55) &&
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(flash_buffer_v[5] == 0x30)) {
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int offset = &Page[A >> 11][A] - Flash;
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int sector = offset / FLASH_SECTOR_SIZE;
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for (uint32 i = sector * FLASH_SECTOR_SIZE; i < (sector + 1) * FLASH_SECTOR_SIZE; i++)
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Flash[i % PRGsize[ROM_CHIP]] = 0xFF;
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FCEU_printf("Flash sector #%d is erased (0x%08x - 0x%08x)\n", sector, offset, offset + FLASH_SECTOR_SIZE);
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}
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// erase chip, lol
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if ((flash_state == 6) &&
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(flash_buffer_a[0] == 0x0AAA) && (flash_buffer_v[0] == 0xAA) &&
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(flash_buffer_a[1] == 0x0555) && (flash_buffer_v[1] == 0x55) &&
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(flash_buffer_a[2] == 0x0AAA) && (flash_buffer_v[2] == 0x80) &&
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(flash_buffer_a[3] == 0x0AAA) && (flash_buffer_v[3] == 0xAA) &&
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(flash_buffer_a[4] == 0x0555) && (flash_buffer_v[4] == 0x55) &&
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(flash_buffer_v[5] == 0x10)) {
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memset(Flash, 0xFF, PRGsize[ROM_CHIP]);
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FCEU_printf("Flash chip erased.\n");
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}
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// write byte
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if ((flash_state == 4) &&
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(flash_buffer_a[0] == 0x0AAA) && (flash_buffer_v[0] == 0xAA) &&
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(flash_buffer_a[1] == 0x0555) && (flash_buffer_v[1] == 0x55) &&
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(flash_buffer_a[2] == 0x0AAA) && (flash_buffer_v[2] == 0xA0)) {
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int offset = &Page[A >> 11][A] - Flash;
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if (CartBR(A) != 0xFF) {
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FCEU_PrintError("Error: can't write to 0x%08x, flash sector is not erased\n", offset);
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}
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else {
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CartBW(A, V);
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}
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flash_state = 0;
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}
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// not a command
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if (((A & 0xFFF) != 0x0AAA) && ((A & 0xFFF) != 0x0555)) {
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flash_state = 0;
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}
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// reset
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if (V == 0xF0) {
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flash_state = 0;
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cfi_mode = 0;
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FixMMC3PRG(MMC3_cmd);
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}
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}
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}
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}
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static void CommonReset(void) {
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MMC3RegReset();
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EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
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flash_state = 0;
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cfi_mode = 0;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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@ -166,6 +312,8 @@ static void COOLBOYPower(void) {
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FixMMC3CHR(MMC3_cmd);
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SetWriteHandler(0x5000, 0x5fff, CartBW); // some games access random unmapped areas and crashes because of KT-008 PCB hack in MMC3 source lol
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SetWriteHandler(0x6000, 0x6fff, COOLBOYWrite);
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SetWriteHandler(0x8000, 0xFFFF, COOLBOYFlashWrite);
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SetReadHandler(0x8000, 0xFFFF, COOLBOYFlashRead);
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}
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static void MINDKIDSPower(void) {
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@ -173,41 +321,88 @@ static void MINDKIDSPower(void) {
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EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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SetWriteHandler(0x5000, 0x5fff, COOLBOYWrite);
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SetWriteHandler(0x5000, 0x7fff, MINDKIDSWrite);
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SetWriteHandler(0x8000, 0xFFFF, COOLBOYFlashWrite);
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SetReadHandler(0x8000, 0xFFFF, COOLBOYFlashRead);
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}
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static void CommonClose(void) {
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if (WRAM)
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FCEU_gfree(WRAM);
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if (Flash)
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FCEU_gfree(Flash);
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if (CFI)
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FCEU_gfree(CFI);
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WRAM = Flash = CFI = NULL;
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}
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void CommonInit(CartInfo* info, int submapper)
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{
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GenMMC3_Init(info, 2048, info->vram_size / 1024, !info->ines2 ? 8 : (info->wram_size + info->battery_wram_size) / 1024, info->battery);
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pwrap = COOLBOYPW;
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cwrap = COOLBOYCW;
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switch (submapper)
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{
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case 1:
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info->Power = MINDKIDSPower;
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default:
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info->Power = COOLBOYPower;
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break;
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}
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info->Reset = CommonReset;
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info->Close = CommonClose;
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flash_save = info->battery;
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if (flash_save) {
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CFI = (uint8*)FCEU_gmalloc(sizeof(cfi_data) * 2);
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for (int i = 0; i < sizeof(cfi_data); i++) {
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CFI[i * 2] = CFI[i * 2 + 1] = cfi_data[i];
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}
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SetupCartPRGMapping(CFI_CHIP, CFI, sizeof(cfi_data) * 2, 0);
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Flash = (uint8*)FCEU_gmalloc(PRGsize[ROM_CHIP]);
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for (int i = 0; i < PRGsize[ROM_CHIP]; i++) {
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Flash[i] = PRGptr[ROM_CHIP][i % PRGsize[ROM_CHIP]];
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}
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SetupCartPRGMapping(FLASH_CHIP, Flash, PRGsize[ROM_CHIP], 1);
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info->SaveGame[1] = Flash;
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info->SaveGameLen[1] = PRGsize[ROM_CHIP];
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}
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AddExState(EXPREGS, 4, 0, "EXPR");
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if (flash_save)
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{
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AddExState(&flash_state, sizeof(flash_state), 0, "FLST");
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AddExState(flash_buffer_a, sizeof(flash_buffer_a), 0, "FLBA");
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AddExState(flash_buffer_v, sizeof(flash_buffer_v), 0, "FLBV");
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AddExState(&cfi_mode, sizeof(cfi_mode), 0, "CFIM");
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AddExState(Flash, PRGsize[ROM_CHIP], 0, "FLAS");
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}
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}
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// Registers at $6xxx
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void COOLBOY_Init(CartInfo *info) {
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GenMMC3_Init(info, 2048, 256, 8, 1);
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pwrap = COOLBOYPW;
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cwrap = COOLBOYCW;
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info->Power = COOLBOYPower;
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info->Reset = COOLBOYReset;
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AddExState(EXPREGS, 4, 0, "EXPR");
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void COOLBOY_Init(CartInfo* info) {
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CommonInit(info, 0);
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}
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// Registers at $5xxx
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void MINDKIDS_Init(CartInfo *info) {
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GenMMC3_Init(info, 2048, 256, 8, 1);
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pwrap = COOLBOYPW;
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cwrap = COOLBOYCW;
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info->Power = MINDKIDSPower;
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info->Reset = COOLBOYReset;
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AddExState(EXPREGS, 4, 0, "EXPR");
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void MINDKIDS_Init(CartInfo* info) {
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CommonInit(info, 1);
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}
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// For NES 2.0 loader
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void SMD132_SMD133_Init(CartInfo *info) {
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void SMD132_SMD133_Init(CartInfo* info) {
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switch (info->submapper)
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{
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case 0:
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COOLBOY_Init(info);
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break;
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case 1:
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MINDKIDS_Init(info);
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CommonInit(info, info->submapper);
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break;
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default:
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FCEU_PrintError("Unknown submapper: #%d.", info->submapper);
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FCEU_PrintError("Submapper #%d is not supported", info->submapper);
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break;
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}
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}
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