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berzerk: correct s14001a busy flag

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This commit is contained in:
hap 2022-10-06 19:17:21 +02:00
parent e5c48bb53d
commit ea746999a8
1 changed files with 3 additions and 3 deletions
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6
src/mame/stern/berzerk.cpp
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@ -590,7 +590,7 @@ void berzerk_state::audio_w(offs_t offset, uint8_t data)
case 0:
m_s14001a->data_w(data & 0x3f);
/* clock the chip -- via a 555 timer */
/* clock the chip via a 555 timer */
m_s14001a->start_w(1);
m_s14001a->start_w(0);
@ -598,7 +598,7 @@ void berzerk_state::audio_w(offs_t offset, uint8_t data)
case 1:
{
/* volume */
/* volume - 0 appears to be inaudible */
m_s14001a->force_update();
m_s14001a->set_output_gain(0, (data >> 3 & 7) / 7.0);
@ -633,7 +633,7 @@ uint8_t berzerk_state::audio_r(offs_t offset)
{
/* offset 4 reads from the S14001A */
case 4:
return (m_s14001a->busy_r()) ? 0xc0 : 0x40;
return (m_s14001a->busy_r()) ? 0x00 : 0x40;
/* offset 6 is open bus */
case 6:
logerror("attempted read from berzerk audio reg 6 (sfxctrl)!\n");