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hp2622a: Add row interrupts; disable bell for now (nw)

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This commit is contained in:
AJR 2018-10-02 15:16:03 -04:00
parent 80d7461a75
commit 6bb83f79b8
1 changed files with 22 additions and 4 deletions
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26
src/mame/drivers/hp2620.cpp
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@ -36,6 +36,7 @@ public:
void hp2622(machine_config &config);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
@ -50,6 +51,7 @@ private:
u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
DECLARE_WRITE_LINE_MEMBER(nlrc_w);
DECLARE_WRITE_LINE_MEMBER(bell_w);
void io_map(address_map &map);
@ -63,6 +65,8 @@ private:
required_device<ripple_counter_device> m_bellctr;
required_region_ptr<u8> m_p_chargen;
required_shared_ptr<u8> m_nvram;
u16 m_display_page;
};
@ -86,7 +90,7 @@ void hp2620_state::nvram_w(offs_t offset, u8 data)
u8 hp2620_state::keystat_r()
{
// LS299 at U25
return 0;
return 0xff;
}
void hp2620_state::keydisp_w(u8 data)
@ -94,7 +98,7 @@ void hp2620_state::keydisp_w(u8 data)
// LS374 at U26
// TODO: D0-D3 = KEY3-KEY6
m_bellctr->reset_w(BIT(data, 5));
m_bellctr->reset_w(1 /*BIT(data, 5)*/); // FIXME: does this ever get turned off?
// TODO: D6 = BLINK RATE
// TODO: D7 = ENHOFF
}
@ -123,6 +127,7 @@ void hp2620_state::modem_w(u8 data)
void hp2620_state::crtc_w(offs_t offset, u8 data)
{
m_crtc->register_load(data & 3, offset & 0xfff);
m_display_page = offset & 0x3000;
}
void hp2620_state::ennmi_w(offs_t offset, u8 data)
@ -130,6 +135,13 @@ void hp2620_state::ennmi_w(offs_t offset, u8 data)
m_nmigate->in_w<0>(BIT(offset, 0));
}
WRITE_LINE_MEMBER(hp2620_state::nlrc_w)
{
// clock input for LS175 at U59
if (state)
m_nmigate->in_w<1>((m_crtc->lc_r() & 7) == 3);
}
WRITE_LINE_MEMBER(hp2620_state::bell_w)
{
m_bell->level_w(state);
@ -156,10 +168,15 @@ void hp2620_state::io_map(address_map &map)
map(0xe1, 0xe1).nopw(); // program bug, undocumented expansion or ???
}
void hp2620_state::machine_start()
{
save_item(NAME(m_display_page));
}
void hp2620_state::machine_reset()
{
m_nmigate->in_w<1>(0);
m_bellctr->reset_w(1); // FIXME: this behavior isn't accurate
m_display_page = 0;
}
static INPUT_PORTS_START( hp2622 )
@ -181,6 +198,7 @@ void hp2620_state::hp2622(machine_config &config)
DP8367(config, m_crtc, 25.7715_MHz_XTAL).set_screen("screen");
m_crtc->set_half_shift(true);
m_crtc->hsync_callback().set(m_bellctr, FUNC(ripple_counter_device::clock_w)).invert();
m_crtc->lrc_callback().set(FUNC(hp2620_state::nlrc_w)).invert();
mos6551_device &acia(MOS6551(config, "acia", 0)); // SY6551
acia.set_xtal(25.7715_MHz_XTAL / 14); // 1.84 MHz
@ -219,4 +237,4 @@ ROM_START( hp2622a )
ROM_LOAD( "1818-1489.xu311", 0x0000, 0x2000, CRC(9879b153) SHA1(fc1705d6de38eb6d3a67f1ae439e359e5124d028) )
ROM_END
COMP(1982, hp2622a, 0, 0, hp2622, hp2622, hp2620_state, empty_init, "HP", "HP-2622A", MACHINE_NOT_WORKING)
COMP(1982, hp2622a, 0, 0, hp2622, hp2622, hp2620_state, empty_init, "HP", "HP-2622A", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)