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megadriv: hook up z80 busrq pin

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hap 2025-02-19 21:47:57 +01:00
parent 085a086349
commit bf9df04e00
1 changed files with 4 additions and 8 deletions
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12
src/mame/sega/megadriv.cpp
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@ -441,21 +441,17 @@ uint16_t md_base_state::megadriv_68k_check_z80_bus(offs_t offset, uint16_t mem_m
TIMER_CALLBACK_MEMBER(md_base_state::megadriv_z80_run_state)
{
/* Is the z80 RESET line pulled? */
// TODO: Z80 /RESET
if (m_genz80.z80_is_reset)
{
m_z80snd->reset();
m_z80snd->suspend(SUSPEND_REASON_HALT, 1);
m_z80snd->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
m_ymsnd->reset();
}
else
{
m_z80snd->set_input_line(INPUT_LINE_RESET, CLEAR_LINE);
/* Check if z80 has the bus */
// TODO: Z80 /BUSREQ
if (m_genz80.z80_has_bus)
m_z80snd->resume(SUSPEND_REASON_HALT);
else
m_z80snd->suspend(SUSPEND_REASON_HALT, 1);
m_z80snd->set_input_line(Z80_INPUT_LINE_BUSRQ, m_genz80.z80_has_bus ? CLEAR_LINE : ASSERT_LINE);
}
}