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Add mapper 552.

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This commit is contained in:
NewRisingSun
2025-09-11 00:14:36 +02:00
parent 3182bb3ec9
commit 69ddfae35c
3 changed files with 22 additions and 6 deletions
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26
src/boards/82.c → src/boards/82_552.c
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@@ -26,6 +26,7 @@
static uint8 regs[9], ctrl;
static uint8 *WRAM = NULL;
static uint32 WRAMSIZE;
static uint8 is552;
static SFORMAT StateRegs[] =
{
@@ -34,6 +35,13 @@ static SFORMAT StateRegs[] =
{ 0 }
};
uint8 prgBits (uint8 val) {
if (is552)
return val >>5 &0x01 | val >>3 &0x02 | val >>1 &0x04 | val <<1 &0x08 | val <<3 &0x10 | val <<5 &0x20;
else
return val >>2;
}
static void Sync(void) {
uint32 swap = ((ctrl & 2) << 11);
setchr2(0x0000 ^ swap, regs[0] >> 1);
@@ -43,9 +51,9 @@ static void Sync(void) {
setchr1(0x1800 ^ swap, regs[4]);
setchr1(0x1c00 ^ swap, regs[5]);
setprg8r(0x10, 0x6000, 0);
setprg8(0x8000, regs[6]);
setprg8(0xA000, regs[7]);
setprg8(0xC000, regs[8]);
setprg8(0x8000, prgBits(regs[6]));
setprg8(0xA000, prgBits(regs[7]));
setprg8(0xC000, prgBits(regs[8]));
setprg8(0xE000, ~0);
setmirror(ctrl & 1);
}
@@ -56,9 +64,9 @@ static DECLFW(M82Write) {
else
switch (A) {
case 0x7ef6: ctrl = V & 3; break;
case 0x7efa: regs[6] = V >> 2; break;
case 0x7efb: regs[7] = V >> 2; break;
case 0x7efc: regs[8] = V >> 2; break;
case 0x7efa: regs[6] = V; break;
case 0x7efb: regs[7] = V; break;
case 0x7efc: regs[8] = V; break;
}
Sync();
}
@@ -82,6 +90,7 @@ static void StateRestore(int version) {
}
void Mapper82_Init(CartInfo *info) {
is552 = 0;
info->Power = M82Power;
info->Close = M82Close;
@@ -96,3 +105,8 @@ void Mapper82_Init(CartInfo *info) {
GameStateRestore = StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}
void Mapper552_Init(CartInfo *info) {
Mapper82_Init(info);
is552 = 1;
}