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full ym2612 save/load for 940

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@495 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-06-25 21:53:53 +00:00
parent eaa9417a9b
commit e4fb433cd6
8 changed files with 126 additions and 41 deletions
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39
platform/gp2x/code940/940.c
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@ -18,6 +18,8 @@ void drain_wb(void);
// is changed by other core just before we update it
void set_if_not_changed(int *val, int oldval, int newval);
void _memcpy(void *dst, const void *src, int count);
// asm volatile ("mov r0, #0" ::: "r0");
// asm volatile ("mcr p15, 0, r0, c7, c6, 0" ::: "r0"); /* flush dcache */
// asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer */
@ -58,6 +60,26 @@ static void mp3_decode(void)
set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, readPtr - mp3_data);
}
static void ym_flush_writes(void)
{
UINT16 *wbuff;
int i;
if (shared_ctl->writebuffsel == 1) {
wbuff = shared_ctl->writebuff1;
} else {
wbuff = shared_ctl->writebuff0;
}
/* playback all writes */
for (i = 2048; i > 0; i--) {
UINT16 d = *wbuff++;
if (d == 0xffff) break;
if (d == 0xfffe) continue;
YM2612Write_(d >> 8, d);
}
}
static void ym_update(int *ym_buffer)
{
int i, dw;
@ -86,7 +108,8 @@ static void ym_update(int *ym_buffer)
YM2612Write_(d >> 8, d);
}
if (two_upds) {
if (two_upds)
{
int len1 = shared_ctl->length / 2;
shared_ctl->ym_active_chs =
YM2612UpdateOne_(ym_buffer, len1, shared_ctl->stereo, 1);
@ -145,6 +168,20 @@ void Main940(void)
YM2612PicoStateLoad_();
break;
case JOB940_PICOSTATESAVE2:
YM2612PicoStateSave2(0, 0);
_memcpy(shared_ctl->writebuff0, ym2612_940->REGS, 0x200);
break;
case JOB940_PICOSTATELOAD2_PREP:
ym_flush_writes();
break;
case JOB940_PICOSTATELOAD2:
_memcpy(ym2612_940->REGS, shared_ctl->writebuff0, 0x200);
YM2612PicoStateLoad2(0, 0);
break;
case JOB940_YM2612UPDATEONE:
ym_update(ym_buffer);
break;