Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-22 16:31:49 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

micro20: preliminary RTC hookup (nw)

Browse Source
This commit is contained in:
arbee 2016-12-05 08:24:15 -05:00
parent d5bf02a68b
commit 1e91807ebe
1 changed files with 33 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
src/mame/drivers/micro20.cpp
View File

@ -34,7 +34,8 @@ public:
m_maincpu(*this, MAINCPU_TAG),
m_rom(*this, "bootrom"),
m_mainram(*this, "mainram"),
m_pit(*this, PIT_TAG)
m_pit(*this, PIT_TAG),
m_rtc(*this, RTC_TAG)
{
}
@ -42,6 +43,7 @@ public:
required_memory_region m_rom;
required_shared_ptr<uint32_t> m_mainram;
required_device<pit68230_device> m_pit;
required_device<msm58321_device> m_rtc;
virtual void machine_start() override;
virtual void machine_reset() override;
@ -51,6 +53,8 @@ public:
TIMER_DEVICE_CALLBACK_MEMBER(micro20_timer);
DECLARE_WRITE_LINE_MEMBER(h4_w);
DECLARE_WRITE8_MEMBER(portb_w);
DECLARE_WRITE8_MEMBER(portc_w);
private:
@ -74,7 +78,8 @@ void micro20_state::machine_reset()
TIMER_DEVICE_CALLBACK_MEMBER(micro20_state::micro20_timer)
{
// m_pit-> TODO: write this to TIN on the 68230 when it supports that
m_pit->update_tin(ASSERT_LINE);
m_pit->update_tin(CLEAR_LINE);
}
WRITE_LINE_MEMBER(micro20_state::h4_w)
@ -88,6 +93,23 @@ WRITE_LINE_MEMBER(micro20_state::m68k_reset_callback)
m_pit->reset();
}
WRITE8_MEMBER(micro20_state::portb_w)
{
m_rtc->d0_w((data & 1) ? ASSERT_LINE : CLEAR_LINE);
m_rtc->d1_w((data & 2) ? ASSERT_LINE : CLEAR_LINE);
m_rtc->d2_w((data & 4) ? ASSERT_LINE : CLEAR_LINE);
m_rtc->d3_w((data & 8) ? ASSERT_LINE : CLEAR_LINE);
}
WRITE8_MEMBER(micro20_state::portc_w)
{
m_rtc->stop_w((data & 1) ? 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->address_write_w((data & 0x40) ? ASSERT_LINE : CLEAR_LINE);
m_rtc->test_w((data & 0x80) ? ASSERT_LINE : CLEAR_LINE);
}
READ32_MEMBER(micro20_state::buserror_r)
{
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
@ -127,9 +149,17 @@ static MACHINE_CONFIG_START( micro20, micro20_state )
MCFG_WD1772_ADD(FDC_TAG, XTAL_16_67MHz / 2)
MCFG_DEVICE_ADD(PIT_TAG, PIT68230, XTAL_16_67MHz / 2)
MCFG_PIT68230_H4_CB(WRITELINE(micro20_state, h4_w));
MCFG_PIT68230_H4_CB(WRITELINE(micro20_state, h4_w))
MCFG_PIT68230_PB_OUTPUT_CB(WRITE8(micro20_state, portb_w))
MCFG_PIT68230_PC_OUTPUT_CB(WRITE8(micro20_state, portc_w))
MCFG_DEVICE_ADD(RTC_TAG, MSM58321, XTAL_32_768kHz)
MCFG_MSM58321_YEAR0(1984)
MCFG_MSM58321_D0_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb0_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_D3_HANDLER(DEVWRITELINE(PIT_TAG, pit68230_device, pb3_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))
MACHINE_CONFIG_END