diff options
Diffstat (limited to 'hw/sb16.c')
| -rw-r--r-- | hw/sb16.c | 84 |
1 files changed, 60 insertions, 24 deletions
@@ -193,6 +193,31 @@ static void aux_timer (void *opaque) #define DMA8_AUTO 1 #define DMA8_HIGH 2 +static void continue_dma8 (SB16State *s) +{ + if (s->freq > 0) { + audsettings_t as; + + s->audio_free = 0; + + as.freq = s->freq; + as.nchannels = 1 << s->fmt_stereo; + as.fmt = s->fmt; + + s->voice = AUD_open_out ( + &s->card, + s->voice, + "sb16", + s, + SB_audio_callback, + &as, + 0 /* little endian */ + ); + } + + control (s, 1); +} + static void dma_cmd8 (SB16State *s, int mask, int dma_len) { s->fmt = AUD_FMT_U8; @@ -201,7 +226,8 @@ static void dma_cmd8 (SB16State *s, int mask, int dma_len) s->fmt_signed = 0; s->fmt_stereo = (s->mixer_regs[0x0e] & 2) != 0; if (-1 == s->time_const) { - s->freq = 11025; + if (s->freq <= 0) + s->freq = 11025; } else { int tmp = (256 - s->time_const); @@ -239,27 +265,7 @@ static void dma_cmd8 (SB16State *s, int mask, int dma_len) s->freq, s->fmt_stereo, s->fmt_signed, s->fmt_bits, s->block_size, s->dma_auto, s->fifo, s->highspeed); - if (s->freq) { - audsettings_t as; - - s->audio_free = 0; - - as.freq = s->freq; - as.nchannels = 1 << s->fmt_stereo; - as.fmt = s->fmt; - - s->voice = AUD_open_out ( - &s->card, - s->voice, - "sb16", - s, - SB_audio_callback, - &as, - 0 /* little endian */ - ); - } - - control (s, 1); + continue_dma8 (s); speaker (s, 1); } @@ -437,7 +443,7 @@ static void command (SB16State *s, uint8_t cmd) break; case 0x1c: /* Auto-Initialize DMA DAC, 8-bit */ - control (s, 1); + dma_cmd8 (s, DMA8_AUTO, -1); break; case 0x20: /* Direct ADC, Juice/PL */ @@ -531,7 +537,9 @@ static void command (SB16State *s, uint8_t cmd) break; case 0xd4: /* continue DMA operation. 8bit */ - control (s, 1); + /* KQ6 (or maybe Sierras audblst.drv in general) resets + the frequency between halt/continue */ + continue_dma8 (s); break; case 0xd5: /* halt DMA operation. 16bit */ @@ -818,6 +826,33 @@ static void complete (SB16State *s) return; } +static void legacy_reset (SB16State *s) +{ + audsettings_t as; + + s->freq = 11025; + s->fmt_signed = 0; + s->fmt_bits = 8; + s->fmt_stereo = 0; + + as.freq = s->freq; + as.nchannels = 1; + as.fmt = AUD_FMT_U8; + + s->voice = AUD_open_out ( + &s->card, + s->voice, + "sb16", + s, + SB_audio_callback, + &as, + 0 /* little endian */ + ); + + /* Not sure about that... */ + /* AUD_set_active_out (s->voice, 1); */ +} + static void reset (SB16State *s) { pic_set_irq (s->irq, 0); @@ -841,6 +876,7 @@ static void reset (SB16State *s) dsp_out_data(s, 0xaa); speaker (s, 0); control (s, 0); + legacy_reset (s); } static IO_WRITE_PROTO (dsp_write) |