RaySollium99/libpicofe
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bugfixes, new scaling, double ym upd at 940

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@83 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-31 13:57:45 +00:00
parent 17fa1e44f6
commit 79cad12255
11 changed files with 192 additions and 108 deletions
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51
gp2x/940ctl.c
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@ -66,8 +66,10 @@ static int writebuff_ptr = 0;
/* OPN Mode Register Write */
static void set_timers( int v )
static int set_timers( int v )
{
int change;
/* b7 = CSM MODE */
/* b6 = 3 slot mode */
/* b5 = reset b */
@ -76,6 +78,7 @@ static void set_timers( int v )
/* b2 = timer enable a */
/* b1 = load b */
/* b0 = load a */
change = (ST_mode ^ v) & 0xc0;
ST_mode = v;
/* reset Timer b flag */
@ -85,6 +88,8 @@ static void set_timers( int v )
/* reset Timer a flag */
if( v & 0x10 )
ST_status &= ~1;
return change;
}
/* YM2612 write */
@ -93,11 +98,14 @@ static void set_timers( int v )
/* returns 1 if sample affecting state changed */
int YM2612Write_940(unsigned int a, unsigned int v)
{
int addr; //, ret=1;
int addr;
int upd = 1; /* the write affects sample generation */
v &= 0xff; /* adjust to 8 bit bus */
a &= 3;
//printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);
switch( a ) {
case 0: /* address port 0 */
if (!addr_A1 && ST_address == v)
@ -108,7 +116,7 @@ int YM2612Write_940(unsigned int a, unsigned int v)
(v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))
return 0;
addr_A1 = 0;
//ret=0;
upd = 0;
break;
case 1: /* data port 0 */
@ -152,14 +160,16 @@ int YM2612Write_940(unsigned int a, unsigned int v)
}
return 0;
case 0x27: /* mode, timer control */
set_timers( v );
break; // other side needs ST.mode for 3slot mode
if (set_timers( v ))
break; // other side needs ST.mode for 3slot mode
return 0;
case 0x2a: /* DAC data (YM2612) */
dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */
return 0;
case 0x2b: /* DAC Sel (YM2612) */
/* b7 = dac enable */
dacen = v & 0x80;
upd = 0;
break; // other side has to know this
default:
break;
@ -173,7 +183,7 @@ int YM2612Write_940(unsigned int a, unsigned int v)
return 0;
ST_address = v;
addr_A1 = 1;
//ret=0;
upd = 0;
break;
case 3: /* data port 1 */
@ -186,14 +196,25 @@ int YM2612Write_940(unsigned int a, unsigned int v)
break;
}
//printf("ym pass\n");
if(currentConfig.EmuOpt & 4) {
/* queue this write for 940 */
if (writebuff_ptr < 2047) {
if (shared_ctl->writebuffsel == 1) {
shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;
} else {
shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;
UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;
/* detect rapid ym updates */
if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {
int mid = Pico.m.pal ? 68 : 93;
if (Pico.m.scanline > mid) {
//printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);
writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;
writebuff_ptr |= 0x80000000;
//printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);
}
}
/* queue this write for 940 */
if ((writebuff_ptr&0xffff) < 2047) {
writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;
} else {
printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);
}
@ -301,7 +322,7 @@ void YM2612PicoStateLoad_940(void)
addr_A1 = old_A1;
add_job_940(JOB940_PICOSTATELOAD);
// add_job_940(JOB940_PICOSTATELOAD);
}
@ -465,9 +486,9 @@ int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)
else memset32(buffer, 0, length<<stereo);
if (shared_ctl->writebuffsel == 1) {
shared_ctl->writebuff0[writebuff_ptr] = 0xffff;
shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;
} else {
shared_ctl->writebuff1[writebuff_ptr] = 0xffff;
shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;
}
writebuff_ptr = 0;