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Fix test for extra divide on SN76489 and clones. Fixes music in King's Quest III.

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This commit is contained in:
SarahW 2017-12-14 18:24:40 +00:00
commit ac5c9a923d
1 changed files with 5 additions and 5 deletions
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10
src/sound_sn76489.c
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@ -92,7 +92,7 @@ void sn76489_write(uint16_t addr, uint8_t data, void *p)
case 0:
sn76489->freqlo[3] = data & 0xf;
sn76489->latch[3] = (sn76489->freqlo[3] | (sn76489->freqhi[3] << 4)) << 6;
if (sn76489->extra_divide)
if (!sn76489->extra_divide)
sn76489->latch[3] &= 0x3ff;
if (!sn76489->latch[3])
sn76489->latch[3] = (sn76489->extra_divide ? 2048 : 1024) << 6;
@ -105,7 +105,7 @@ void sn76489_write(uint16_t addr, uint8_t data, void *p)
case 0x20:
sn76489->freqlo[2] = data & 0xf;
sn76489->latch[2] = (sn76489->freqlo[2] | (sn76489->freqhi[2] << 4)) << 6;
if (sn76489->extra_divide)
if (!sn76489->extra_divide)
sn76489->latch[2] &= 0x3ff;
if (!sn76489->latch[2])
sn76489->latch[2] = (sn76489->extra_divide ? 2048 : 1024) << 6;
@ -118,7 +118,7 @@ void sn76489_write(uint16_t addr, uint8_t data, void *p)
case 0x40:
sn76489->freqlo[1] = data & 0xf;
sn76489->latch[1] = (sn76489->freqlo[1] | (sn76489->freqhi[1] << 4)) << 6;
if (sn76489->extra_divide)
if (!sn76489->extra_divide)
sn76489->latch[1] &= 0x3ff;
if (!sn76489->latch[1])
sn76489->latch[1] = (sn76489->extra_divide ? 2048 : 1024) << 6;
@ -134,7 +134,7 @@ void sn76489_write(uint16_t addr, uint8_t data, void *p)
sn76489->noise = data & 0xf;
if ((data & 3) == 3) sn76489->latch[0] = sn76489->latch[1];
else sn76489->latch[0] = 0x400 << (data & 3);
if (sn76489->extra_divide)
if (!sn76489->extra_divide)
sn76489->latch[0] &= 0x3ff;
if (!sn76489->latch[0])
sn76489->latch[0] = (sn76489->extra_divide ? 2048 : 1024) << 6;
@ -161,7 +161,7 @@ void sn76489_write(uint16_t addr, uint8_t data, void *p)
{
sn76489->freqhi[sn76489->lasttone] = data & 0x7F;
freq = sn76489->freqlo[sn76489->lasttone] | (sn76489->freqhi[sn76489->lasttone] << 4);
if (sn76489->extra_divide)
if (!sn76489->extra_divide)
freq &= 0x3ff;
if (!freq)
freq = sn76489->extra_divide ? 2048 : 1024;