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sms, basic gamegear support

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This commit is contained in:
kub 2021-10-13 21:30:54 +02:00
parent 0df7401c02
commit 466fa07953
16 changed files with 451 additions and 214 deletions
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15
pico/sms.c
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@ -52,8 +52,17 @@ static void vdp_data_write(unsigned char d)
struct PicoVideo *pv = &Pico.video;
if (pv->type == 3) {
if (PicoMem.cram[pv->addr & 0x1f] != d) Pico.m.dirtyPal = 1;
PicoMem.cram[pv->addr & 0x1f] = d;
if (Pico.m.hardware & 0x1) { // GG, same layout as MD
unsigned a = pv->addr & 0x3f;
if (a & 0x1) d &= 0x0f;
if (((u8 *)PicoMem.cram)[MEM_LE2(a)] != d) Pico.m.dirtyPal = 1;
((u8 *)PicoMem.cram)[MEM_LE2(a)] = d;
} else { // SMS, convert to MD layout (00BbGgRr to 0000BbBbGgGgRrRr)
unsigned a = pv->addr & 0x1f;
u16 c = (d&0x30)*0x40 + (d&0x0c)*0x10 + (d&0x03)*0x04;
if (PicoMem.cram[a] != (c | (c>>2))) Pico.m.dirtyPal = 1;
PicoMem.cram[a] = c | (c>>2);
}
} else {
PicoMem.vramb[MEM_LE2(pv->addr)] = d;
}
@ -130,7 +139,7 @@ static unsigned char z80_sms_in(unsigned short a)
{
case 0x00:
case 0x01:
d = 0xff;
d = 0xff & ~(PicoIn.pad[0] & 0x80);
break;
case 0x40: /* V counter */