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kingdrby.cpp: More plausible method of generating NMI on sound CPU (nw)

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This commit is contained in:
AJR 2017-09-09 00:48:13 -04:00
parent b365166438
commit a99be799b2
1 changed files with 3 additions and 1 deletions
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4
src/mame/drivers/kingdrby.cpp
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@ -304,7 +304,7 @@ WRITE8_MEMBER(kingdrby_state::hopper_io_w)
WRITE8_MEMBER(kingdrby_state::sound_cmd_w)
{
m_soundcpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
m_soundcpu->set_input_line(INPUT_LINE_NMI, BIT(data, 7) ? ASSERT_LINE : CLEAR_LINE);
m_sound_cmd = data;
/* soundlatch is unneeded since we are already using perfect interleave. */
// m_soundlatch->write(space,0, data);
@ -955,6 +955,7 @@ static MACHINE_CONFIG_START( kingdrby )
// 6000-6003 PPI group modes 0/0 - B & C (lower) as input, A & C (upper) as output.
MCFG_DEVICE_ADD("ppi8255_1", I8255A, 0)
MCFG_I8255_OUT_PORTA_CB(WRITE8(kingdrby_state, sound_cmd_w))
MCFG_I8255_TRISTATE_PORTA_CB(CONSTANT(0x7f))
MCFG_I8255_IN_PORTB_CB(READ8(kingdrby_state, key_matrix_r))
MCFG_I8255_IN_PORTC_CB(READ8(kingdrby_state, input_mux_r))
MCFG_I8255_OUT_PORTC_CB(WRITE8(kingdrby_state, outport2_w))
@ -995,6 +996,7 @@ static MACHINE_CONFIG_DERIVED( kingdrbb, kingdrby )
MCFG_DEVICE_ADD("ppi8255_0", I8255A, 0)
/* C as input, (all) as output */
MCFG_I8255_OUT_PORTA_CB(WRITE8(kingdrby_state, sound_cmd_w))
MCFG_I8255_TRISTATE_PORTA_CB(CONSTANT(0x7f))
MCFG_I8255_IN_PORTB_CB(IOPORT("IN0"))
MCFG_I8255_OUT_PORTB_CB(WRITE8(kingdrby_state, outportb_w))
MCFG_I8255_IN_PORTC_CB(IOPORT("IN1"))