diff options
Diffstat (limited to 'src/devices/machine/genpc.cpp')
-rw-r--r-- | src/devices/machine/genpc.cpp | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/devices/machine/genpc.cpp b/src/devices/machine/genpc.cpp index b02090ffb52..e76a51bd62c 100644 --- a/src/devices/machine/genpc.cpp +++ b/src/devices/machine/genpc.cpp @@ -395,8 +395,16 @@ WRITE8_MEMBER( ibm5160_mb_device::pc_ppi_portb_w ) WRITE8_MEMBER( ibm5160_mb_device::nmi_enable_w ) { m_nmi_enabled = BIT(data,7); - m_isabus->set_nmi_state(m_nmi_enabled); + if (!m_nmi_enabled) + m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); } + +WRITE_LINE_MEMBER( ibm5160_mb_device::iochck_w ) +{ + if (m_nmi_enabled && !state) + m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); +} + //************************************************************************** // GLOBAL VARIABLES //************************************************************************** @@ -413,7 +421,7 @@ DEFINE_DEVICE_TYPE(IBM5160_MOTHERBOARD, ibm5160_mb_device, "ibm5160_mb", "IBM 51 //------------------------------------------------- MACHINE_CONFIG_START(ibm5160_mb_device::device_add_mconfig) - PIT8253(config, m_pit8253, 0); + PIT8253(config, m_pit8253); m_pit8253->set_clk<0>(XTAL(14'318'181)/12.0); // heartbeat IRQ m_pit8253->out_handler<0>().set(m_pic8259, FUNC(pic8259_device::ir0_w)); m_pit8253->set_clk<1>(XTAL(14'318'181)/12.0); // DRAM refresh @@ -438,7 +446,7 @@ MACHINE_CONFIG_START(ibm5160_mb_device::device_add_mconfig) m_dma8237->out_dack_callback<2>().set(FUNC(ibm5160_mb_device::pc_dack2_w)); m_dma8237->out_dack_callback<3>().set(FUNC(ibm5160_mb_device::pc_dack3_w)); - PIC8259(config, m_pic8259, 0); + PIC8259(config, m_pic8259); m_pic8259->out_int_callback().set(FUNC(ibm5160_mb_device::pic_int_w)); I8255A(config, m_ppi8255, 0); @@ -447,7 +455,8 @@ MACHINE_CONFIG_START(ibm5160_mb_device::device_add_mconfig) m_ppi8255->in_pc_callback().set(FUNC(ibm5160_mb_device::pc_ppi_portc_r)); ISA8(config, m_isabus, 0); - m_isabus->set_cputag(":maincpu"); + m_isabus->set_memspace(":maincpu", AS_PROGRAM); + m_isabus->set_iospace(":maincpu", AS_IO); m_isabus->irq2_callback().set(m_pic8259, FUNC(pic8259_device::ir2_w)); m_isabus->irq3_callback().set(m_pic8259, FUNC(pic8259_device::ir3_w)); m_isabus->irq4_callback().set(m_pic8259, FUNC(pic8259_device::ir4_w)); @@ -457,6 +466,7 @@ MACHINE_CONFIG_START(ibm5160_mb_device::device_add_mconfig) m_isabus->drq1_callback().set(m_dma8237, FUNC(am9517a_device::dreq1_w)); m_isabus->drq2_callback().set(m_dma8237, FUNC(am9517a_device::dreq2_w)); m_isabus->drq3_callback().set(m_dma8237, FUNC(am9517a_device::dreq3_w)); + m_isabus->iochck_callback().set(FUNC(ibm5160_mb_device::iochck_w)); MCFG_DEVICE_ADD("pc_kbdc", PC_KBDC, 0) MCFG_PC_KBDC_OUT_CLOCK_CB(WRITELINE(*this, ibm5160_mb_device, keyboard_clock_w)) |