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High PC speaker frequencies treated as constant level.

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Improved timing for port 0x61 writes.
This commit is contained in:
TomW 2015-11-14 18:14:32 +00:00
commit b459fc9815
6 changed files with 19 additions and 0 deletions
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3
src/keyboard_amstrad.c
View file

@ -76,6 +76,9 @@ void keyboard_amstrad_write(uint16_t port, uint8_t val, void *priv)
keyboard_amstrad.pb = val;
ppi.pb = val;
timer_process();
timer_update_outstanding();
speaker_gated = val & 1;
speaker_enable = val & 2;
if (speaker_enable)

4
src/keyboard_at.c
View file

@ -284,6 +284,10 @@ void keyboard_at_write(uint16_t port, uint8_t val, void *priv)
case 0x61:
ppi.pb = val;
timer_process();
timer_update_outstanding();
speaker_gated = val & 1;
speaker_enable = val & 2;
if (speaker_enable)

3
src/keyboard_olim24.c
View file

@ -144,6 +144,9 @@ void keyboard_olim24_write(uint16_t port, uint8_t val, void *priv)
case 0x61:
ppi.pb = val;
timer_process();
timer_update_outstanding();
speaker_gated = val & 1;
speaker_enable = val & 2;
if (speaker_enable)

4
src/keyboard_pcjr.c
View file

@ -124,6 +124,10 @@ void keyboard_pcjr_write(uint16_t port, uint8_t val, void *priv)
case 0x61:
keyboard_pcjr.pb = val;
timer_process();
timer_update_outstanding();
speaker_gated = val & 1;
speaker_enable = val & 2;
if (speaker_enable)

3
src/keyboard_xt.c
View file

@ -76,6 +76,9 @@ void keyboard_xt_write(uint16_t port, uint8_t val, void *priv)
keyboard_xt.pb = val;
ppi.pb = val;
timer_process();
timer_update_outstanding();
speaker_gated = val & 1;
speaker_enable = val & 2;
if (speaker_enable)

2
src/sound_speaker.c
View file

@ -20,6 +20,8 @@ static void speaker_poll(void *p)
{
if (!pit.m[2] || pit.m[2]==4)
speaker_buffer[speaker_pos] = speakval;
else if (pit.l[2] < 0x40)
speaker_buffer[speaker_pos] = 0xa00;
else
speaker_buffer[speaker_pos] = speakon ? 0x1400 : 0;
}