80486DX2-66/86Box-fork
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More small pieces of ESS emulation

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This commit is contained in:
Cacodemon345
2024-03-02 17:12:26 +06:00
committed by Kagamiin~
parent d5dad279c4
commit 97b239aed5
2 changed files with 12 additions and 0 deletions
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1
src/include/86box/snd_sb_dsp.h
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@@ -141,6 +141,7 @@ typedef struct sb_dsp_t {
uint8_t azt_eeprom[AZTECH_EEPROM_SIZE]; /* the eeprom in the Aztech cards is attached to the DSP */ uint8_t azt_eeprom[AZTECH_EEPROM_SIZE]; /* the eeprom in the Aztech cards is attached to the DSP */
uint8_t ess_regs[256]; /* ESS registers. */ uint8_t ess_regs[256]; /* ESS registers. */
uint8_t ess_playback_mode;
mpu_t *mpu; mpu_t *mpu;
} sb_dsp_t; } sb_dsp_t;

11
src/sound/snd_sb_dsp.c
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@@ -1332,6 +1332,15 @@ sb_dsp_dma_attach(sb_dsp_t *dsp,
dsp->dma_priv = priv; dsp->dma_priv = priv;
} }
void
sb_ess_finish_dma(sb_dsp_t *dsp)
{
if (!dsp->ess_playback_mode)
return;
ESSreg(0xB8) &= ~0x01;
dma_set_drq(dsp->sb_8_dmanum, 0);
}
void void
pollsb(void *priv) pollsb(void *priv)
{ {
@@ -1530,6 +1539,7 @@ pollsb(void *priv)
else { else {
dsp->sb_8_enable = 0; dsp->sb_8_enable = 0;
timer_disable(&dsp->output_timer); timer_disable(&dsp->output_timer);
sb_ess_finish_dma(dsp);
} }
sb_irq(dsp, 1); sb_irq(dsp, 1);
} }
@@ -1582,6 +1592,7 @@ pollsb(void *priv)
else { else {
dsp->sb_16_enable = 0; dsp->sb_16_enable = 0;
timer_disable(&dsp->output_timer); timer_disable(&dsp->output_timer);
sb_ess_finish_dma(dsp);
} }
sb_irq(dsp, 0); sb_irq(dsp, 0);
} }