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[Access Virus] Hookup LCD to port 1 bits #14430

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Merged
galibert merged 1 commit into from
Oct 29, 2025
+23 −6
Merged

[Access Virus] Hookup LCD to port 1 bits #14430

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27 changes: 22 additions & 5 deletions src/mame/access/acvirus.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,8 @@ class acvirus_state : public driver_device
void prog_map(address_map &map) ATTR_COLD;
void data_map(address_map &map) ATTR_COLD;

u8 p1_r();
void p1_w(u8 data);
void p5_w(u8 data);

u8 p402_r();
Expand All @@ -123,6 +125,20 @@ void acvirus_state::machine_reset()
{
}

u8 acvirus_state::p1_r()
{
return 0; // m_lcdc ready?
}

void acvirus_state::p1_w(u8 data)
{
m_lcdc->db_w(((data << 3) & 0xf0) | 0x08);
m_lcdc->e_w(BIT(data, 5));
m_lcdc->rw_w(BIT(data, 6));
m_lcdc->rs_w(BIT(data, 7));
}


void acvirus_state::p5_w(u8 data)
{
m_rombank->set_entry((data >> 4) & 15);
Expand Down Expand Up @@ -155,13 +171,10 @@ void acvirus_state::virusa(machine_config &config)
SAB80C535(config, m_maincpu, XTAL(12'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, &acvirus_state::prog_map);
m_maincpu->set_addrmap(AS_DATA, &acvirus_state::data_map);
m_maincpu->port_in_cb<1>().set(FUNC(acvirus_state::p1_r));
m_maincpu->port_out_cb<1>().set(FUNC(acvirus_state::p1_w));
m_maincpu->port_out_cb<5>().set(FUNC(acvirus_state::p5_w));

/*
This may be hooked either to memorymap or to some of the ports:
map(0x?, 0x?).rw("lcdc", FUNC(hd44780_device::data_r), FUNC(hd44780_device::data_w)).umask16(0x00ff);
map(0x?, 0x?).rw("lcdc", FUNC(hd44780_device::control_r), FUNC(hd44780_device::control_w)).umask16(0x00ff);
*/
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_LCD));
screen.set_refresh_hz(60);
screen.set_screen_update("lcdc", FUNC(hd44780_device::screen_update));
Expand All @@ -186,6 +199,8 @@ void acvirus_state::virusb(machine_config &config)
SAB80C535(config, m_maincpu, XTAL(12'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, &acvirus_state::prog_map);
m_maincpu->set_addrmap(AS_DATA, &acvirus_state::data_map);
m_maincpu->port_in_cb<1>().set(FUNC(acvirus_state::p1_r));
m_maincpu->port_out_cb<1>().set(FUNC(acvirus_state::p1_w));
m_maincpu->port_out_cb<5>().set(FUNC(acvirus_state::p5_w));

screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_LCD));
Expand Down Expand Up @@ -214,6 +229,8 @@ void acvirus_state::virusc(machine_config &config)
SAB80C535(config, m_maincpu, XTAL(24'000'000)); // 515 really
m_maincpu->set_addrmap(AS_PROGRAM, &acvirus_state::prog_map);
m_maincpu->set_addrmap(AS_DATA, &acvirus_state::data_map);
m_maincpu->port_in_cb<1>().set(FUNC(acvirus_state::p1_r));
m_maincpu->port_out_cb<1>().set(FUNC(acvirus_state::p1_w));
m_maincpu->port_out_cb<5>().set(FUNC(acvirus_state::p5_w));

screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_LCD));
Expand Down
2 changes: 1 addition & 1 deletion src/mame/layout/virusb.lay
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Original file line number Diff line number Diff line change
Expand Up @@ -735,7 +735,7 @@ license:CC0-1.0
<element ref="black_rect"><bounds x="517" y="344" width="255" height="82"/></element>
<element ref="screen_metalic_border"><bounds x="523" y="346" width="243" height="78"/></element>
<element ref="screen_green_border"><bounds x="537" y="359" width="215" height="53"/></element>
<screen index="0"><bounds x="548" y="369" width="192" height="32"/></screen>
<screen index="0"><bounds x="548" y="370" width="192" height="34"/></screen>
<repeat count="2">
<param name="y" start="369" increment="18" />
<repeat count="16">
Expand Down
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