RaySollium99/picodrive
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buffering, PCM DMA, memcpy12bswap

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@66 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-11 23:46:27 +00:00
parent 83bd0b76ab
commit 0a051f558c
15 changed files with 395 additions and 70 deletions
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86
Pico/cd/Memory.c
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@ -421,6 +421,7 @@ u16 PicoReadM68k16(u32 a)
a = (a&2) | (cell_map(a >> 2) << 2); // cell arranged
else a &= 0x1fffe;
d = *(u16 *)(Pico_mcd->word_ram1M[bank]+a);
//d = 0xaaaa;
} else {
// allow access in any mode, like Gens does
d = *(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));
@ -929,6 +930,63 @@ u32 PicoReadS68k32(u32 a)
}
/* check: jaguar xj 220 (draws entire world using decode) */
static void decode_write8(u32 a, u8 d, int r3)
{
u8 *pd = Pico_mcd->word_ram1M[!(r3 & 1)] + (((a>>1)^1)&0x1ffff);
u8 oldmask = (a&1) ? 0xf0 : 0x0f;
//if ((a & 0x3ffff) < 0x28000) return;
//return;
r3 &= 0x18;
d &= 0x0f;
if (!(a&1)) d <<= 4;
//dprintf("FIXME: decode, r3 = %02x", r3);
if (r3 == 8) {
if ((!(*pd & (~oldmask))) && d) goto do_it;
} else if (r3 > 8) {
if (d) goto do_it;
} else {
goto do_it;
}
return;
do_it:
*pd = d | (*pd & oldmask);
}
static void decode_write16(u32 a, u16 d, int r3)
{
u8 *pd = Pico_mcd->word_ram1M[!(r3 & 1)] + (((a>>1)^1)&0x1ffff);
//if ((a & 0x3ffff) < 0x28000) return;
r3 &= 0x18;
d &= 0x0f0f;
d |= d >> 4;
if (r3 == 8) {
u8 dold = *pd;
if (!(dold & 0xf0)) dold |= d & 0xf0;
if (!(dold & 0x0f)) dold |= d & 0x0f;
*pd = dold;
} else if (r3 > 8) {
u8 dold = *pd;
if (!(d & 0xf0)) d |= dold & 0xf0;
if (!(d & 0x0f)) d |= dold & 0x0f;
*pd = d;
} else {
*pd = d;
}
//dprintf("FIXME: decode");
}
// -----------------------------------------------------------------
void PicoWriteS68k8(u32 a,u8 d)
@ -958,13 +1016,10 @@ void PicoWriteS68k8(u32 a,u8 d)
// word RAM (2M area)
if ((a&0xfc0000)==0x080000) { // 080000-0bffff
int r3 = Pico_mcd->s68k_regs[3];
wrdprintf("s68k_wram2M w8: [%06x] %02x @%06x", a, d, SekPcS68k);
if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?
int bank = !(Pico_mcd->s68k_regs[3]&1);
if (a&1) d &= 0x0f;
else d >>= 4;
Pico_mcd->word_ram1M[bank][((a>>1)^1)&0x1ffff]=d;
dprintf("FIXME: decode");
if (r3 & 4) { // 1M decode mode?
decode_write8(a, d, r3);
} else {
// allow access in any mode, like Gens does
*(u8 *)(Pico_mcd->word_ram2M+((a^1)&0x3ffff))=d;
@ -1039,12 +1094,10 @@ void PicoWriteS68k16(u32 a,u16 d)
// word RAM (2M area)
if ((a&0xfc0000)==0x080000) { // 080000-0bffff
int r3 = Pico_mcd->s68k_regs[3];
wrdprintf("s68k_wram2M w16: [%06x] %04x @%06x", a, d, SekPcS68k);
if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?
int bank = !(Pico_mcd->s68k_regs[3]&1);
d &= ~0xf0; d |= d >> 8;
Pico_mcd->word_ram1M[bank][((a>>1)^1)&0x1ffff] = d;
dprintf("FIXME: decode");
if (r3 & 4) { // 1M decode mode?
decode_write16(a, d, r3);
} else {
// allow access in any mode, like Gens does
*(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe))=d;
@ -1121,14 +1174,11 @@ void PicoWriteS68k32(u32 a,u32 d)
// word RAM (2M area)
if ((a&0xfc0000)==0x080000) { // 080000-0bffff
int r3 = Pico_mcd->s68k_regs[3];
wrdprintf("s68k_wram2M w32: [%06x] %08x @%06x", a, d, SekPcS68k);
if (Pico_mcd->s68k_regs[3]&4) { // 1M decode mode?
int bank = !(Pico_mcd->s68k_regs[3]&1);
a >>= 1;
d &= 0x0f0f0f0f; d |= d >> 4;
Pico_mcd->word_ram1M[bank][((a+0)^1)&0x1ffff] = d >> 16;
Pico_mcd->word_ram1M[bank][((a+1)^1)&0x1ffff] = d;
dprintf("FIXME: decode");
if (r3 & 4) { // 1M decode mode?
decode_write16(a , d >> 16, r3);
decode_write16(a+2, d , r3);
} else {
// allow access in any mode, like Gens does
u16 *pm=(u16 *)(Pico_mcd->word_ram2M+(a&0x3fffe));