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dim68k: more fdc hookup, CP/M 68K now partially loads. [R. Belmont, O. Galibert]

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This commit is contained in:
arbee 2021-01-07 13:18:28 -05:00
parent 4fd3a17070
commit c12a1ed683
1 changed files with 21 additions and 1 deletions
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22
src/mame/drivers/dim68k.cpp
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@ -79,10 +79,13 @@ private:
void dim68k_video_reset_w(u16 data);
MC6845_UPDATE_ROW(crtc_update_row);
DECLARE_WRITE_LINE_MEMBER(fdc_irq_w);
void mem_map(address_map &map);
bool m_speaker_bit;
u8 m_video_control;
u8 m_fdc_irq;
void machine_reset() override;
void machine_start() override;
@ -125,8 +128,22 @@ void dim68k_state::dim68k_speaker_w(u16 data)
m_speaker->level_w(m_speaker_bit);
}
WRITE_LINE_MEMBER(dim68k_state::fdc_irq_w)
{
if (state)
{
m_fdc_irq = 0;
}
else
{
m_fdc_irq = 0x80;
}
}
void dim68k_state::dim68k_fdc_w(u16 data)
{
m_fdc->tc_w(BIT(data, 5));
if (BIT(data, 1))
{
m_floppy[BIT(data, 0)^1]->get_device()->mon_w(true);
@ -226,6 +243,7 @@ void dim68k_state::mem_map(address_map &map)
map(0xffc800, 0xffc801).rw(FUNC(dim68k_state::dim68k_speaker_r), FUNC(dim68k_state::dim68k_speaker_w));
map(0xffcc00, 0xffcc1f).rw(FUNC(dim68k_state::dim68k_game_switches_r), FUNC(dim68k_state::dim68k_reset_timers_w));
map(0xffd000, 0xffd003).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff); // NEC uPD765A
map(0xffd000, 0xffd000).lr8([this]() -> u8 { return m_fdc_irq; }, "free0");
map(0xffd004, 0xffd005).rw(FUNC(dim68k_state::dim68k_fdc_r), FUNC(dim68k_state::dim68k_fdc_w));
//map(0x00ffd400, 0x00ffd403) emulation trap control
map(0xffd800, 0xffd801).w(FUNC(dim68k_state::dim68k_printer_strobe_w));
@ -240,6 +258,7 @@ INPUT_PORTS_END
void dim68k_state::machine_reset()
{
m_bootview.select(0);
m_fdc_irq = 0;
}
// Text-only; graphics isn't emulated yet. Need to find out if hardware cursor is used.
@ -344,9 +363,10 @@ void dim68k_state::dim68k(machine_config &config)
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50);
/* Devices */
UPD765A(config, m_fdc, 8'000'000, true, true); // these options unknown
UPD765A(config, m_fdc, 4'000'000, true, true); // these options unknown
FLOPPY_CONNECTOR(config, m_floppy[0], dim68k_floppies, "525dd", floppy_image_device::default_floppy_formats);
FLOPPY_CONNECTOR(config, m_floppy[1], dim68k_floppies, "525dd", floppy_image_device::default_floppy_formats);
m_fdc->intrq_wr_callback().set(FUNC(dim68k_state::fdc_irq_w));
MC6845(config, m_crtc, 1790000);
m_crtc->set_screen("screen");