Implement ESS identification mixer register

2024-03-04 02:00:07 +06:00
parent 68f6779b2f
commit dfa0ec6be8
2 changed files with 22 additions and 2 deletions
--- a/src/sound/snd_sb_dsp.c
+++ b/src/sound/snd_sb_dsp.c
@@ -900,6 +900,9 @@ sb_exec_command(sb_dsp_t *dsp)
        case 0x10: /* 8-bit direct mode */
            sb_dsp_update(dsp);
            dsp->sbdat = dsp->sbdatl = dsp->sbdatr = (dsp->sb_data[0] ^ 0x80) << 8;
+            // FIXME: What does the ESS AudioDrive do to its filter/sample rate divider registers when emulating this Sound Blaster command?
+            ESSreg(0xA1) = 128 - (397700 / 22050);
+            ESSreg(0xA2) = 256 - (7160000 / (82 * ((4 * 22050) / 10)));
            break;
        case 0x14: /* 8-bit single cycle DMA output */
            sb_start_dma(dsp, 1, 0, 0, dsp->sb_data[0] + (dsp->sb_data[1] << 8));