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CMI8x38: Make another bit writable and improve DMA value readback, fixes #4576 again

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RichardG867
2024-07-17 18:12:03 -03:00
parent 74d1aa97c1
commit 1e597c39c4
1 changed files with 19 additions and 2 deletions
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21
src/sound/snd_cmi8x38.c
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@@ -860,7 +860,7 @@ cmi8x38_write(uint16_t addr, uint8_t val, void *priv)
case 0x1b:
if (dev->type == CMEDIA_CMI8338)
val &= 0xf0;
val &= 0xf4; /* bit 2 reserved, mpxplay driver expects writable */
else
val &= 0xd7;
break;
@@ -909,6 +909,24 @@ cmi8x38_write(uint16_t addr, uint8_t val, void *priv)
dev->sb->opl.write(addr, val, dev->sb->opl.priv);
return;
case 0x80 ... 0x83:
case 0x88 ... 0x8b:
dev->io_regs[addr] = val;
dev->dma[(addr & 0x78) >> 3].sample_ptr = *((uint32_t *) &dev->io_regs[addr & 0xfc]);
return;
case 0x84 ... 0x85:
case 0x8c ... 0x8d:
dev->io_regs[addr] = val;
dev->dma[(addr & 0x78) >> 3].frame_count_dma = dev->dma[(addr & 0x78) >> 3].sample_count_out = *((uint16_t *) &dev->io_regs[addr & 0xfe]) + 1;
return;
case 0x86 ... 0x87:
case 0x8e ... 0x8f:
dev->io_regs[addr] = val;
dev->dma[(addr & 0x78) >> 3].frame_count_fragment = *((uint16_t *) &dev->io_regs[addr & 0xfe]) + 1;
return;
case 0x92:
if (dev->type == CMEDIA_CMI8338)
return;
@@ -927,7 +945,6 @@ cmi8x38_write(uint16_t addr, uint8_t val, void *priv)
case 0x26:
case 0x70:
case 0x71:
case 0x80 ... 0x8f:
break;
default: