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micro20; WIP (nw)

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This commit is contained in:
arbee 2016-12-06 21:43:15 -05:00
parent 1ac85ba0af
commit dd3a5c7055
1 changed files with 13 additions and 7 deletions
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20
src/mame/drivers/micro20.cpp
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@ -57,7 +57,7 @@ public:
DECLARE_WRITE8_MEMBER(portc_w); DECLARE_WRITE8_MEMBER(portc_w);
private: private:
u8 m_tin;
}; };
void micro20_state::machine_start() void micro20_state::machine_start()
@ -66,20 +66,22 @@ void micro20_state::machine_start()
void micro20_state::machine_reset() void micro20_state::machine_reset()
{ {
uint32_t *pROM = (uint32_t *)m_rom->base(); u32 *pROM = (uint32_t *)m_rom->base();
uint32_t *pRAM = (uint32_t *)m_mainram.target(); u32 *pRAM = (uint32_t *)m_mainram.target();
pRAM[0] = pROM[2]; pRAM[0] = pROM[2];
pRAM[1] = pROM[3]; pRAM[1] = pROM[3];
m_maincpu->reset(); m_maincpu->reset();
m_maincpu->set_reset_callback(write_line_delegate(FUNC(micro20_state::m68k_reset_callback),this)); m_maincpu->set_reset_callback(write_line_delegate(FUNC(micro20_state::m68k_reset_callback),this));
m_tin = 0;
} }
TIMER_DEVICE_CALLBACK_MEMBER(micro20_state::micro20_timer) TIMER_DEVICE_CALLBACK_MEMBER(micro20_state::micro20_timer)
{ {
m_pit->update_tin(ASSERT_LINE); m_pit->update_tin(m_tin);
m_pit->update_tin(CLEAR_LINE); m_tin ^= 1;
} }
WRITE_LINE_MEMBER(micro20_state::h4_w) WRITE_LINE_MEMBER(micro20_state::h4_w)
@ -103,6 +105,10 @@ WRITE8_MEMBER(micro20_state::portb_w)
WRITE8_MEMBER(micro20_state::portc_w) WRITE8_MEMBER(micro20_state::portc_w)
{ {
// MSM58321 CS1 and CS2 are tied to /RST, inverted RESET.
// So they're always high when the system is not reset.
m_rtc->cs1_w(ASSERT_LINE);
m_rtc->cs2_w(ASSERT_LINE);
m_rtc->stop_w((data & 1) ? ASSERT_LINE : CLEAR_LINE); m_rtc->stop_w((data & 1) ? ASSERT_LINE : CLEAR_LINE);
m_rtc->write_w((data & 2) ? ASSERT_LINE : CLEAR_LINE); m_rtc->write_w((data & 2) ? ASSERT_LINE : CLEAR_LINE);
m_rtc->read_w((data & 0x10) ? ASSERT_LINE : CLEAR_LINE); m_rtc->read_w((data & 0x10) ? ASSERT_LINE : CLEAR_LINE);
@ -154,14 +160,14 @@ static MACHINE_CONFIG_START( micro20, micro20_state )
MCFG_PIT68230_PC_OUTPUT_CB(WRITE8(micro20_state, portc_w)) MCFG_PIT68230_PC_OUTPUT_CB(WRITE8(micro20_state, portc_w))
MCFG_DEVICE_ADD(RTC_TAG, MSM58321, XTAL_32_768kHz) MCFG_DEVICE_ADD(RTC_TAG, MSM58321, XTAL_32_768kHz)
MCFG_MSM58321_YEAR0(1984) MCFG_MSM58321_DEFAULT_24H(false)
MCFG_MSM58321_D0_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb0_w)) MCFG_MSM58321_D0_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb0_w))
MCFG_MSM58321_D1_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb1_w)) MCFG_MSM58321_D1_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb1_w))
MCFG_MSM58321_D2_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb2_w)) MCFG_MSM58321_D2_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb2_w))
MCFG_MSM58321_D3_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb3_w)) MCFG_MSM58321_D3_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb3_w))
MCFG_MSM58321_BUSY_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb7_w)) MCFG_MSM58321_BUSY_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb7_w))
MCFG_TIMER_DRIVER_ADD_PERIODIC("timer", micro20_state, micro20_timer, attotime::from_hz(100)) MCFG_TIMER_DRIVER_ADD_PERIODIC("timer", micro20_state, micro20_timer, attotime::from_hz(200))
MACHINE_CONFIG_END MACHINE_CONFIG_END
static INPUT_PORTS_START( micro20 ) static INPUT_PORTS_START( micro20 )