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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36
Pico/cd/LC89510.c
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@ -70,7 +70,7 @@ void LC89510_Reset(void)
void Update_CDC_TRansfer(int which)
{
unsigned int DMA_Adr, dep, length, len;
unsigned int DMA_Adr, dep, length;
unsigned short *dest;
unsigned char *src;
@ -96,7 +96,7 @@ void Update_CDC_TRansfer(int which)
else length = CDC_DMA_SPEED;
// TODO: dst bounds checking? DAC.N alignment?
// TODO: dst bounds checking?
src = Pico_mcd->cdc.Buffer + Pico_mcd->cdc.DAC.N;
DMA_Adr = (Pico_mcd->s68k_regs[0xA]<<8) | Pico_mcd->s68k_regs[0xB];
@ -112,13 +112,11 @@ void Update_CDC_TRansfer(int which)
dest = (unsigned short *) (Pico_mcd->word_ram1M[bank] + dep);
// TODO: bswapcpy
for (len = length; len > 0; len--, src+=2, dest++)
*dest = (src[0]<<8) | src[1];
memcpy16bswap(dest, src, length);
{ // debug
unsigned char *b1 = Pico_mcd->word_ram1M[bank] + dep;
unsigned char *b2 = (unsigned char *)dest - 8;
unsigned char *b2 = (unsigned char *)(dest+length) - 8;
dprintf("%02x %02x %02x %02x .. %02x %02x %02x %02x",
b1[0], b1[1], b1[4], b1[5], b2[0], b2[1], b2[4], b2[5]);
}
@ -130,25 +128,26 @@ void Update_CDC_TRansfer(int which)
Pico_mcd->cdc.DAC.N, dep, length);
dest = (unsigned short *) (Pico_mcd->word_ram2M + dep);
for (len = length; len > 0; len--, src+=2, dest++)
*dest = (src[0]<<8) | src[1];
memcpy16bswap(dest, src, length);
{ // debug
unsigned char *b1 = Pico_mcd->word_ram2M + dep;
unsigned char *b2 = (unsigned char *)dest - 4;
unsigned char *b2 = (unsigned char *)(dest+length) - 4;
dprintf("%02x %02x %02x %02x .. %02x %02x %02x %02x",
b1[0], b1[1], b1[2], b1[3], b2[0], b2[1], b2[2], b2[3]);
}
}
}
else if (which == 4) // PCM RAM
else if (which == 4) // PCM RAM (check: popful Mail)
{
#if 0
dest = (unsigned char *) Ram_PCM;
dep = ((DMA_Adr & 0x03FF) << 2) + PCM_Chip.Bank;
#else
dprintf("FIXME: CD DMA # %04x -> PCM", Pico_mcd->cdc.DAC.N);
#endif
dep = (DMA_Adr & 0x03FF) << 2;
dprintf("CD DMA # %04x -> PCM[%i] # %04x, len=%i",
Pico_mcd->cdc.DAC.N, Pico_mcd->pcm.bank, dep, length);
dest = (unsigned short *) (Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank] + dep);
if (Pico_mcd->cdc.DAC.N & 1) /* unaligned src? */
memcpy(dest, src, length*2);
else memcpy16(dest, (unsigned short *) src, length);
}
else if (which == 5) // PRG RAM
{
@ -157,12 +156,11 @@ void Update_CDC_TRansfer(int which)
cdprintf("CD DMA # %04x -> prg_ram # %06x, len=%i",
Pico_mcd->cdc.DAC.N, dep, length);
for (len = length; len > 0; len--, src+=2, dest++)
*dest = (src[0]<<8) | src[1];
memcpy16bswap(dest, src, length);
{ // debug
unsigned char *b1 = Pico_mcd->prg_ram + dep;
unsigned char *b2 = (unsigned char *)dest - 4;
unsigned char *b2 = (unsigned char *)(dest+length) - 4;
dprintf("%02x %02x %02x %02x .. %02x %02x %02x %02x",
b1[0], b1[1], b1[2], b1[3], b2[0], b2[1], b2[2], b2[3]);
}