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nec/pc88va.cpp: run irq7 thru the same 0 -> 1 logic as the other irqs, makes system to be more stable during SW intros

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This commit is contained in:
angelosa 2022-12-23 01:25:25 +01:00
parent d5e08d91e7
commit 0f57c5df7a
2 changed files with 18 additions and 4 deletions
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20
src/mame/nec/pc88va.cpp
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@ -1024,14 +1024,11 @@ WRITE_LINE_MEMBER( pc88va_state::fdc_irq )
{
if(m_fdc_mode && state)
{
// TODO: ugh why it doesn't follow state?
//printf("%d\n",state);
m_pic2->ir3_w(0);
m_pic2->ir3_w(1);
}
}
// TODO: often dies, which implicitly means "make the full system to hang" in PC-88 land ...
WRITE_LINE_MEMBER(pc88va_state::int4_irq_w)
{
bool irq_state = m_sound_irq_enable & state;
@ -1117,6 +1114,20 @@ void pc88va_state::machine_reset()
m_sound_irq_pending = false;
}
WRITE_LINE_MEMBER(pc88va_state::slave_irq7)
{
// If we don't follow this dispatch like the other irqs it will mismatch
// between sound and FDC, causing an hang or a disk failure during intros
// in rtype, olteus, shinraba, 88va2d.
// TODO: how pc88va even acknowledge any irq?
if (state)
{
m_maincpu->set_input_line(INPUT_LINE_IRQ7, CLEAR_LINE);
m_maincpu->set_input_line(INPUT_LINE_IRQ7, ASSERT_LINE);
}
}
void pc88va_state::pc88va(machine_config &config)
{
V50(config, m_maincpu, MASTER_CLOCK); // μPD9002, aka V50 + μPD70008AC (for PC8801 compatibility mode) in place of 8080
@ -1157,7 +1168,8 @@ void pc88va_state::pc88va(machine_config &config)
// external PIC
PIC8259(config, m_pic2, 0);
m_pic2->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ7);
// m_pic2->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ7);
m_pic2->out_int_callback().set(FUNC(pc88va_state::slave_irq7));
m_pic2->in_sp_callback().set_constant(0);
UPD765A(config, m_fdc, 4000000, true, true);

2
src/mame/nec/pc88va.h
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@ -156,6 +156,8 @@ private:
uint8_t kanji_ram_r(offs_t offset);
void kanji_ram_w(offs_t offset, uint8_t data);
DECLARE_WRITE_LINE_MEMBER(slave_irq7);
uint8_t hdd_status_r();
uint16_t sysop_r();