Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Fixed CMS/Game Blaster detection.

Browse source
This commit is contained in:
SarahW 2017-10-17 21:39:37 +01:00
commit 1e75653c5c
1 changed files with 30 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/sound_cms.c
View file

@ -22,6 +22,8 @@ typedef struct cms_t
uint16_t noisefreq[2][2];
int noisecount[2][2];
int noisetype[2][2];
uint8_t latched_data;
int16_t buffer[MAXSOUNDBUFLEN * 2];
@ -106,12 +108,18 @@ void cms_write(uint16_t addr, uint8_t val, void *p)
int voice;
int chip = (addr & 2) >> 1;
pclog("cms_write : addr %04X val %02X\n", addr, val);
// pclog("cms_write : addr %04X val %02X\n", addr, val);
if (addr & 1)
cms->addrs[chip] = val & 31;
else
switch (addr & 0xf)
{
case 1:
cms->addrs[0] = val & 31;
break;
case 3:
cms->addrs[1] = val & 31;
break;
case 0: case 2:
cms_update(cms);
cms->regs[chip][cms->addrs[chip] & 31] = val;
switch (cms->addrs[chip] & 31)
@ -140,18 +148,30 @@ void cms_write(uint16_t addr, uint8_t val, void *p)
cms->noisetype[chip][1] = (val >> 4) & 3;
break;
}
break;
case 0x6: case 0x7:
cms->latched_data = val;
break;
}
}
uint8_t cms_read(uint16_t addr, void *p)
{
cms_t *cms = (cms_t *)p;
int chip = (addr & 2) >> 1;
if (addr & 1)
return cms->addrs[chip];
return cms->regs[chip][cms->addrs[chip] & 31];
// pclog("cms_read : addr %04X\n", addr);
switch (addr & 0xf)
{
case 0x1:
return cms->addrs[0];
case 0x3:
return cms->addrs[1];
case 0x4:
return 0x7f;
case 0xa: case 0xb:
return cms->latched_data;
}
return 0xff;
}
void *cms_init()
@ -160,7 +180,7 @@ void *cms_init()
memset(cms, 0, sizeof(cms_t));
pclog("cms_init\n");
io_sethandler(0x0220, 0x0004, cms_read, NULL, NULL, cms_write, NULL, NULL, cms);
io_sethandler(0x0220, 0x0010, cms_read, NULL, NULL, cms_write, NULL, NULL, cms);
sound_add_handler(cms_get_buffer, cms);
return cms;
}