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lc80: get rid of memory banking

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This commit is contained in:
hap 2021-04-26 21:59:42 +02:00
parent 4338837c11
commit 21a91c921f
2 changed files with 62 additions and 118 deletions
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166
src/mame/drivers/lc80.cpp
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@ -42,8 +42,6 @@ SC-80 starts at ADR C8000.
TODO:
- HALT led
- KSD11 switch
- banking for ROM 4-5
- lc80e
- CTC clock inputs
- Most characters are lost when pasting (lc80, lc80e).
@ -83,8 +81,10 @@ public:
m_out_led(*this, "led0")
{ }
void lc80_2(machine_config &config);
void lc80(machine_config &config);
void lc80a(machine_config &config);
void lc80e(machine_config &config);
void lc80_2(machine_config &config);
DECLARE_INPUT_CHANGED_MEMBER( trigger_reset );
DECLARE_INPUT_CHANGED_MEMBER( trigger_nmi );
@ -103,6 +103,12 @@ private:
required_ioport_array<4> m_inputs;
output_finder<> m_out_led;
void lc80_mem(address_map &map);
void lc80a_mem(address_map &map);
void lc80e_mem(address_map &map);
void lc80_2_mem(address_map &map);
void lc80_io(address_map &map);
DECLARE_WRITE_LINE_MEMBER( ctc_z0_w );
DECLARE_WRITE_LINE_MEMBER( ctc_z1_w );
DECLARE_WRITE_LINE_MEMBER( ctc_z2_w );
@ -116,9 +122,6 @@ private:
// display state
uint8_t m_digit;
uint8_t m_segment;
void lc80_io(address_map &map);
void lc80_mem(address_map &map);
//void lc80e_mem(address_map &map);
};
@ -127,20 +130,27 @@ private:
void lc80_state::lc80_mem(address_map &map)
{
map.global_mask(0x3fff);
map(0x0000, 0x07ff).bankr("bank1");
map(0x0800, 0x0fff).bankr("bank2");
map(0x1000, 0x17ff).bankr("bank3");
map(0x2000, 0x23ff).ram();
map(0x2400, 0x2fff).bankrw("bank4");
map(0x0000, 0x03ff).mirror(0x0400).rom();
map(0x0800, 0x0bff).mirror(0x0400).rom();
}
void lc80_state::lc80a_mem(address_map &map)
{
map.global_mask(0x3fff);
map(0x0000, 0x07ff).rom();
}
void lc80_state::lc80_2_mem(address_map &map)
{
map.global_mask(0x3fff);
map(0x0000, 0x0fff).rom();
}
#if 0
void lc80_state::lc80e_mem(address_map &map)
{
lc80_mem(map);
map(0x0000, 0x1fff).rom();
map(0xc000, 0xcfff).rom();
}
#endif
void lc80_state::lc80_io(address_map &map)
{
@ -221,7 +231,7 @@ WRITE_LINE_MEMBER( lc80_state::ctc_z2_w )
void lc80_state::update_display()
{
m_display->matrix(m_digit, m_segment);
m_display->matrix(m_digit >> 1, m_segment);
}
void lc80_state::pio1_pa_w(uint8_t data)
@ -288,11 +298,8 @@ void lc80_state::pio1_pb_w(uint8_t data)
/* speaker */
m_speaker->level_w(!BIT(data, 1));
/* OUT led */
m_out_led = !BIT(data, 1);
/* 7seg digits/keyboard */
m_digit = ~data >> 2;
/* 7segs/led/keyboard */
m_digit = ~data;
update_display();
}
@ -317,7 +324,7 @@ uint8_t lc80_state::pio2_pb_r()
for (int i = 0; i < 6; i++)
{
if (BIT(m_digit, i))
if (BIT(m_digit, i+2))
{
if (!BIT(m_inputs[0]->read(), i)) data &= ~0x10;
if (!BIT(m_inputs[1]->read(), i)) data &= ~0x20;
@ -346,54 +353,11 @@ static const z80_daisy_config lc80_daisy_chain[] =
void lc80_state::machine_start()
{
address_space &program = m_maincpu->space(AS_PROGRAM);
uint8_t *ROM = memregion("maincpu")->base();
/* setup memory banking */
membank("bank1")->configure_entry(0, &ROM[0]); // TODO
membank("bank1")->configure_entry(1, &ROM[0]);
membank("bank1")->set_entry(1);
membank("bank2")->configure_entry(0, &ROM[0x800]); // TODO
membank("bank2")->configure_entry(1, &ROM[0x800]);
membank("bank2")->set_entry(1);
membank("bank3")->configure_entry(0, &ROM[0x1000]); // TODO
membank("bank3")->configure_entry(1, &ROM[0x1000]);
membank("bank3")->set_entry(1);
membank("bank4")->configure_entry(0, &ROM[0x2000]);
membank("bank4")->set_entry(0);
program.install_readwrite_bank(0x0000, 0x07ff, membank("bank1"));
program.install_readwrite_bank(0x0800, 0x0fff, membank("bank2"));
program.install_readwrite_bank(0x1000, 0x17ff, membank("bank3"));
switch (m_ram->size())
{
case 1*1024:
program.install_readwrite_bank(0x2000, 0x23ff, membank("bank4"));
program.unmap_readwrite(0x2400, 0x2fff);
break;
case 2*1024:
program.install_readwrite_bank(0x2000, 0x27ff, membank("bank4"));
program.unmap_readwrite(0x2800, 0x2fff);
break;
case 3*1024:
program.install_readwrite_bank(0x2000, 0x2bff, membank("bank4"));
program.unmap_readwrite(0x2c00, 0x2fff);
break;
case 4*1024:
program.install_readwrite_bank(0x2000, 0x2fff, membank("bank4"));
break;
}
m_out_led.resolve();
address_space &program = m_maincpu->space(AS_PROGRAM);
program.install_ram(0x2000, 0x2000 + m_ram->size() - 1, 0x1000, m_ram->pointer());
/* register for state saving */
save_item(NAME(m_digit));
save_item(NAME(m_segment));
@ -410,8 +374,8 @@ void lc80_state::lc80(machine_config &config)
m_maincpu->set_addrmap(AS_IO, &lc80_state::lc80_io);
/* video hardware */
PWM_DISPLAY(config, m_display).set_size(6, 8);
m_display->set_segmask(0x3f, 0xff);
PWM_DISPLAY(config, m_display).set_size(1+6, 8);
m_display->set_segmask(0x3f << 1, 0xff);
config.set_default_layout(layout_lc80);
/* sound hardware */
@ -438,58 +402,38 @@ void lc80_state::lc80(machine_config &config)
CASSETTE(config, m_cassette);
m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
RAM(config, m_ram).set_default_size("1K").set_extra_options("2K,3K,4K");
RAM(config, m_ram).set_default_size("1K");
m_ram->set_extra_options("1K,2K,3K,4K");
}
void lc80_state::lc80a(machine_config &config)
{
lc80(config);
m_maincpu->set_addrmap(AS_PROGRAM, &lc80_state::lc80a_mem);
}
void lc80_state::lc80_2(machine_config &config)
{
/* basic machine hardware */
Z80(config, m_maincpu, 1800000); /* UD880D */
m_maincpu->set_addrmap(AS_PROGRAM, &lc80_state::lc80_mem);
m_maincpu->set_addrmap(AS_IO, &lc80_state::lc80_io);
lc80(config);
/* video hardware */
PWM_DISPLAY(config, m_display).set_size(6, 8);
m_display->set_segmask(0x3f, 0xff);
config.set_default_layout(layout_lc80);
/* sound hardware */
SPEAKER(config, "mono").front_center();
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25);
/* devices */
Z80CTC(config, m_ctc, 900000);
m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_ctc->zc_callback<0>().set(FUNC(lc80_state::ctc_z0_w));
m_ctc->zc_callback<1>().set(FUNC(lc80_state::ctc_z1_w));
m_ctc->zc_callback<2>().set(FUNC(lc80_state::ctc_z2_w));
Z80PIO(config, m_pio[0], 900000);
m_pio[0]->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_pio[0]->out_pa_callback().set(FUNC(lc80_state::pio1_pa_w));
m_pio[0]->in_pb_callback().set(FUNC(lc80_state::pio1_pb_r));
m_pio[0]->out_pb_callback().set(FUNC(lc80_state::pio1_pb_w));
Z80PIO(config, m_pio[1], 900000);
m_pio[1]->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
m_pio[1]->in_pb_callback().set(FUNC(lc80_state::pio2_pb_r));
CASSETTE(config, m_cassette);
m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
/* internal ram */
RAM(config, m_ram).set_default_size("4K");
m_maincpu->set_addrmap(AS_PROGRAM, &lc80_state::lc80_2_mem);
m_ram->set_default_size("4K");
}
#if 0
void lc80_state::lc80e(machine_config &config)
{
lc80_2(config);
lc80(config);
/* basic machine hardware */
m_maincpu->set_addrmap(AS_PROGRAM, &lc80_state::lc80e_mem);
m_ram->set_default_size("4K");
// it is running twice as fast
m_maincpu->set_clock(1800000);
m_ctc->set_clock(1800000);
m_pio[0]->set_clock(1800000);
m_pio[1]->set_clock(1800000);
}
#endif
/* ROMs */
@ -524,6 +468,6 @@ ROM_END
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY, FULLNAME, FLAGS
COMP( 1984, lc80, 0, 0, lc80, lc80, lc80_state, empty_init, "VEB Mikroelektronik \"Karl Marx\" Erfurt", "Lerncomputer LC 80 (set 1)", MACHINE_SUPPORTS_SAVE )
COMP( 1984, lc80a, lc80, 0, lc80, lc80, lc80_state, empty_init, "VEB Mikroelektronik \"Karl Marx\" Erfurt", "Lerncomputer LC 80 (set 2)", MACHINE_SUPPORTS_SAVE )
COMP( 1984, lc80e, lc80, 0, lc80_2, lc80, lc80_state, empty_init, "VEB Mikroelektronik \"Karl Marx\" Erfurt", "Lerncomputer LC 80 (export)", MACHINE_SUPPORTS_SAVE )
COMP( 1984, lc80a, lc80, 0, lc80a, lc80, lc80_state, empty_init, "VEB Mikroelektronik \"Karl Marx\" Erfurt", "Lerncomputer LC 80 (set 2)", MACHINE_SUPPORTS_SAVE )
COMP( 1984, lc80e, lc80, 0, lc80e, lc80, lc80_state, empty_init, "VEB Mikroelektronik \"Karl Marx\" Erfurt", "Lerncomputer LC 80 (export)", MACHINE_SUPPORTS_SAVE )
COMP( 1991, lc80_2, lc80, 0, lc80_2, lc80, lc80_state, empty_init, "hack (Eckart Buschendorf)", "Lerncomputer LC 80.2", MACHINE_SUPPORTS_SAVE )

14
src/mame/layout/lc80.lay
View File

@ -29,7 +29,7 @@ license:CC0
<view name="Internal Layout">
<!-- OUT led -->
<element name="led0" ref="green_led">
<element name="0.a" ref="green_led">
<bounds x="0" y="5" width="5" height="5" />
</element>
@ -39,22 +39,22 @@ license:CC0
</element>
<!-- Led address display -->
<element name="digit5" ref="digit">
<element name="digit6" ref="digit">
<bounds x="10" y="0" width="18" height="24" />
</element>
<element name="digit4" ref="digit">
<element name="digit5" ref="digit">
<bounds x="28" y="0" width="18" height="24" />
</element>
<element name="digit3" ref="digit">
<element name="digit4" ref="digit">
<bounds x="46" y="0" width="18" height="24" />
</element>
<element name="digit2" ref="digit">
<element name="digit3" ref="digit">
<bounds x="64" y="0" width="18" height="24" />
</element>
<element name="digit1" ref="digit">
<element name="digit2" ref="digit">
<bounds x="82" y="0" width="18" height="24" />
</element>
<element name="digit0" ref="digit">
<element name="digit1" ref="digit">
<bounds x="100" y="0" width="18" height="24" />
</element>
</view>