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Implement registers 0xC2/0xC3; sound now works in Win3.1

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This commit is contained in:
Kagamiin~
2024-03-09 23:55:36 -03:00
parent 6d3f2c478b
commit b59db332f0
1 changed files with 13 additions and 3 deletions
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16
src/sound/snd_sb_dsp.c
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@@ -868,6 +868,7 @@ static void sb_ess_write_reg(sb_dsp_t *dsp, uint8_t reg, uint8_t data)
case 0xB9: /* Audio 1 Transfer Type */
case 0xBA: /* Left Channel ADC Offset Adjust */
case 0xBB: /* Right Channel ADC Offset Adjust */
case 0xC3: /* Internal state register */
ESSreg(reg) = data;
break;
@@ -909,9 +910,18 @@ sb_exec_command(sb_dsp_t *dsp)
dsp->ess_extended_mode = !!(dsp->sb_command == 0xC6);
return;
}
if (dsp->sb_command == 0xC0) {
else if (dsp->sb_command == 0xC2)
{
sb_ess_write_reg(dsp, 0xC3, dsp->sb_data[0]);
}
else if (dsp->sb_command == 0xC3)
{
sb_add_data(dsp, sb_ess_read_reg(dsp, 0xC3));
}
else if (dsp->sb_command == 0xC0) {
sb_add_data(dsp, sb_ess_read_reg(dsp, dsp->sb_data[0]));
} else if (dsp->sb_command < 0xC0 && dsp->ess_extended_mode) {
}
else if (dsp->sb_command < 0xC0 && dsp->ess_extended_mode) {
sb_ess_write_reg(dsp, dsp->sb_command, dsp->sb_data[0]);
}
return;
@@ -1471,7 +1481,7 @@ sb_write(uint16_t a, uint8_t v, void *priv)
sb_commands[dsp->sb_command] = 2;
}
if (IS_ESS(dsp) && dsp->sb_command >= 0xA0 && dsp->sb_command <= 0xCF) {
if (dsp->sb_command <= 0xC0) {
if (dsp->sb_command <= 0xC0 || dsp->sb_command == 0xC2) {
sb_commands[dsp->sb_command] = 1;
} else {
sb_commands[dsp->sb_command] = -1;