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This commit is contained in:
retro-wertz
2017-10-15 02:07:42 +08:00
parent e428160996
commit ebca2248d0
75 changed files with 641 additions and 582 deletions
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66
src/boards/coolboy.c
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@@ -34,31 +34,32 @@
static void COOLBOYCW(uint32 A, uint8 V) {
uint32 mask = 0xFF ^ (EXPREGS[0] & 0x80);
if (EXPREGS[3] & 0x10) {
if (EXPREGS[3] & 0x40) { // Weird mode
if (EXPREGS[3] & 0x40) { /* Weird mode */
int cbase = (MMC3_cmd & 0x80) << 5;
switch (cbase ^ A) { // Don't even try do understand
switch (cbase ^ A) { /* Don't even try to understand */
case 0x0400:
case 0x0C00: V &= 0x7F; break;
}
}
// Highest bit goes from MMC3 registers when EXPREGS[3]&0x80==0 or from EXPREGS[0]&0x08 otherwise
/* Highest bit goes from MMC3 registers when EXPREGS[3]&0x80==0 or from EXPREGS[0]&0x08 otherwise */
setchr1(A,
(V & 0x80 & mask) | ((((EXPREGS[0] & 0x08) << 4) & ~mask)) // 7th bit
| ((EXPREGS[2] & 0x0F) << 3) // 6-3 bits
| ((A >> 10) & 7) // 2-0 bits
(V & 0x80 & mask) | ((((EXPREGS[0] & 0x08) << 4) & ~mask)) /* 7th bit */
| ((EXPREGS[2] & 0x0F) << 3) /* 6-3 bits */
| ((A >> 10) & 7) /* 2-0 bits */
);
} else {
if (EXPREGS[3] & 0x40) { // Weird mode, again
if (EXPREGS[3] & 0x40) { /* Weird mode, again */
int cbase = (MMC3_cmd & 0x80) << 5;
switch (cbase ^ A) { // Don't even try do understand
switch (cbase ^ A) { /* Don't even try to understand */
case 0x0000: V = DRegBuf[0]; break;
case 0x0800: V = DRegBuf[1]; break;
case 0x0400:
case 0x0C00: V = 0; break;
}
}
// Simple MMC3 mode
// Highest bit goes from MMC3 registers when EXPREGS[3]&0x80==0 or from EXPREGS[0]&0x08 otherwise
/* Simple MMC3 mode
* Highest bit goes from MMC3 registers when EXPREGS[3]&0x80==0 or from EXPREGS[0]&0x08 otherwise
*/
setchr1(A, (V & mask) | (((EXPREGS[0] & 0x08) << 4) & ~mask));
}
}
@@ -67,8 +68,9 @@ static void COOLBOYPW(uint32 A, uint8 V) {
uint32 mask = ((0x3F | (EXPREGS[1] & 0x40) | ((EXPREGS[1] & 0x20) << 2)) ^ ((EXPREGS[0] & 0x40) >> 2)) ^ ((EXPREGS[1] & 0x80) >> 2);
uint32 base = ((EXPREGS[0] & 0x07) >> 0) | ((EXPREGS[1] & 0x10) >> 1) | ((EXPREGS[1] & 0x0C) << 2) | ((EXPREGS[0] & 0x30) << 2);
// Very weird mode
// Last banks are first in this mode, ignored when MMC3_cmd&0x40
/* Very weird mode
* Last banks are first in this mode, ignored when MMC3_cmd&0x40
*/
if ((EXPREGS[3] & 0x40) && (V >= 0xFE) && !((MMC3_cmd & 0x40) != 0)) {
switch (A & 0xE000) {
case 0xA000:
@@ -83,20 +85,20 @@ static void COOLBOYPW(uint32 A, uint8 V) {
}
}
// Regular MMC3 mode, internal ROM size can be up to 2048kb!
/* Regular MMC3 mode, internal ROM size can be up to 2048kb! */
if (!(EXPREGS[3] & 0x10))
setprg8(A, (((base << 4) & ~mask)) | (V & mask));
else { // NROM mode
else { /* NROM mode */
uint8 emask;
mask &= 0xF0;
if ((((EXPREGS[1] & 2) != 0))) // 32kb mode
if ((((EXPREGS[1] & 2) != 0))) /* 32kb mode */
emask = (EXPREGS[3] & 0x0C) | ((A & 0x4000) >> 13);
else // 16kb mode
else /* 16kb mode */
emask = EXPREGS[3] & 0x0E;
setprg8(A, ((base << 4) & ~mask) // 7-4 bits are from base (see below)
| (V & mask) // ... or from MM3 internal regs, depends on mask
| emask // 3-1 (or 3-2 when (EXPREGS[3]&0x0C is set) from EXPREGS[3]
| ((A & 0x2000) >> 13)); // 0th just as is
setprg8(A, ((base << 4) & ~mask) /* 7-4 bits are from base (see below) */
| (V & mask) /* ... or from MM3 internal regs, depends on mask */
| emask /* 3-1 (or 3-2 when (EXPREGS[3]&0x0C is set) from EXPREGS[3] */
| ((A & 0x2000) >> 13)); /* 0th just as is */
}
}
@@ -104,7 +106,7 @@ static DECLFW(COOLBOYWrite) {
if(A001B & 0x80)
CartBW(A,V);
// Deny any further writes when 7th bit is 1 AND 4th is 0
/* Deny any further writes when 7th bit is 1 AND 4th is 0 */
if ((EXPREGS[3] & 0x90) != 0x80) {
EXPREGS[A & 3] = V;
FixMMC3PRG(MMC3_cmd);
@@ -115,10 +117,12 @@ static DECLFW(COOLBOYWrite) {
static void COOLBOYReset(void) {
MMC3RegReset();
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
// EXPREGS[0] = 0;
// EXPREGS[1] = 0x60;
// EXPREGS[2] = 0;
// EXPREGS[3] = 0;
#if 0
EXPREGS[0] = 0;
EXPREGS[1] = 0x60;
EXPREGS[2] = 0;
EXPREGS[3] = 0;
#endif
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
@@ -126,13 +130,15 @@ static void COOLBOYReset(void) {
static void COOLBOYPower(void) {
GenMMC3Power();
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = 0;
// EXPREGS[0] = 0;
// EXPREGS[1] = 0x60;
// EXPREGS[2] = 0;
// EXPREGS[3] = 0;
#if 0
EXPREGS[0] = 0;
EXPREGS[1] = 0x60;
EXPREGS[2] = 0;
EXPREGS[3] = 0;
#endif
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
SetWriteHandler(0x5000, 0x5fff, CartBW); // some games access random unmapped areas and crashes because of KT-008 PCB hack in MMC3 source lol
SetWriteHandler(0x5000, 0x5fff, CartBW); /* some games access random unmapped areas and crashes because of KT-008 PCB hack in MMC3 source lol */
SetWriteHandler(0x6000, 0x7fff, COOLBOYWrite);
}