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(nw) eti660 : cleanup

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This commit is contained in:
Robbbert 2019-05-11 03:09:14 +10:00
parent ce01dd0beb
commit 17c5c96c6d
3 changed files with 51 additions and 71 deletions
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5
src/devices/sound/cdp1864.cpp
View File

@ -391,10 +391,7 @@ WRITE8_MEMBER( cdp1864_device::dma_w )
WRITE_LINE_MEMBER( cdp1864_device::con_w )
{
if (!state)
{
m_con = 0;
}
m_con = state;
}

113
src/mame/drivers/eti660.cpp
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@ -27,12 +27,11 @@
TODO:
- sometimes there's no sound when started. You may need to hard reset until it beeps.
- don't know why, but the expected behaviour of our 6821 pia isn't what this machine
expects, so had to add a couple of hacks.
- doesn't run programs for other chip-8 computers (this might be normal?)
- we support BIN files, but have none to test with.
- in Invaders, can't shoot them
- in Maze, the result is rubbish (works in Emma02 emulator)
- probable CPU bugs:
- in Invaders, can't shoot them
- in Maze, the result is rubbish (these work in Emma02 emulator)
**************************************************************************************************/
@ -43,30 +42,30 @@
/* Read/Write Handlers */
// Schematic is wrong, PCB layout is correct: D0-7 swapped around on PIA.
// There's still a bug in the PIA: if ca2 is instructed to go low, nothing happens.
READ8_MEMBER( eti660_state::pia_r )
{
uint8_t pia_offset = m_maincpu->get_memory_address() & 0x03;
return m_pia->read(pia_offset);
return bitswap<8>(m_pia->read(pia_offset), 0,1,2,3,4,5,6,7);
}
WRITE8_MEMBER( eti660_state::pia_w )
{
uint8_t pia_offset = m_maincpu->get_memory_address() & 0x03;
// Some PIA hacks here, as mentioned in the ToDo.
if (pia_offset == 1)
{
// switch color on when requested (test with Wipeout game)
if (data == 0x2c)
m_color_on = 1;
// enable keyboard
if (data == 0x20)
data = 0x24;
}
data = bitswap<8>(data,0,1,2,3,4,5,6,7);
m_pia->write(pia_offset, data);
// handle bug in PIA
if ((pia_offset == 1) && ((data & 0x30) == 0x30))
ca2_w(BIT(data, 3));
}
WRITE_LINE_MEMBER( eti660_state::ca2_w ) // test with Wipeout game - it should start up in colour
{
m_color_on = !state;
m_cti->con_w(state);
}
WRITE8_MEMBER( eti660_state::colorram_w )
@ -101,55 +100,38 @@ void eti660_state::io_map(address_map &map)
/* Input Ports */
static INPUT_PORTS_START( eti660 )
PORT_START("KEY.0")
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("KEY.1")
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("KEY.2")
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("KEY.3")
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0x0f, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_START("SPECIAL")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("RESET") PORT_CODE(KEYCODE_R)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("STEP") PORT_CODE(KEYCODE_S)
INPUT_PORTS_END
/* Video */
READ_LINE_MEMBER( eti660_state::rdata_r )
{
return BIT(m_color, 0);
}
READ_LINE_MEMBER( eti660_state::bdata_r )
{
return BIT(m_color, 1);
}
READ_LINE_MEMBER( eti660_state::gdata_r )
{
return BIT(m_color, 2);
}
/* CDP1802 Interface */
READ_LINE_MEMBER( eti660_state::clear_r )
@ -158,7 +140,7 @@ READ_LINE_MEMBER( eti660_state::clear_r )
// boot, like the real one does.
if (m_resetcnt < 0xffff)
m_resetcnt++;
if (m_resetcnt == 0xff00)
if (m_resetcnt == 0xf000)
return 0;
return BIT(m_special->read(), 0); // R key
}
@ -201,7 +183,6 @@ WRITE8_MEMBER( eti660_state::dma_w )
else
m_color = m_p_videoram[offset] ? 7 : 0;
m_cti->con_w(0); // HACK
m_cti->dma_w(space, offset, data);
}
@ -250,16 +231,15 @@ WRITE8_MEMBER( eti660_state::pia_pa_w )
*/
m_keylatch = data ^ 0xff;
m_keylatch = bitswap<8>(data,0,1,2,3,4,5,6,7) ^ 0xff;
}
void eti660_state::machine_reset()
{
m_resetcnt = 0;
m_color_on = 0;
// fix for F3 soft reboot
m_maincpu->set_state_int(cosmac_device::COSMAC_R0, 0); // set R0 to start of rom
m_maincpu->set_state_int(cosmac_device::COSMAC_P, 0); // set R0 as the PC register
m_cti->con_w(0);
m_maincpu->reset(); // needed
}
void eti660_state::machine_start()
@ -267,6 +247,10 @@ void eti660_state::machine_start()
m_leds.resolve();
save_item(NAME(m_color_ram));
save_item(NAME(m_color));
save_item(NAME(m_color_on));
save_item(NAME(m_keylatch));
save_item(NAME(m_resetcnt));
}
QUICKLOAD_LOAD_MEMBER( eti660_state, eti660 )
@ -329,9 +313,9 @@ MACHINE_CONFIG_START(eti660_state::eti660)
m_cti->int_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_INT);
m_cti->dma_out_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_DMAOUT);
m_cti->efx_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_EF1);
m_cti->rdata_cb().set(FUNC(eti660_state::rdata_r));
m_cti->bdata_cb().set(FUNC(eti660_state::bdata_r));
m_cti->gdata_cb().set(FUNC(eti660_state::gdata_r));
m_cti->rdata_cb().set([this] () { return BIT(m_color, 0); });
m_cti->bdata_cb().set([this] () { return BIT(m_color, 1); });
m_cti->gdata_cb().set([this] () { return BIT(m_color, 2); });
m_cti->set_chrominance(RES_K(2.2), RES_K(1), RES_K(4.7), RES_K(4.7)); // R7, R5, R6, R4
m_cti->add_route(ALL_OUTPUTS, "mono", 0.25);
@ -339,6 +323,7 @@ MACHINE_CONFIG_START(eti660_state::eti660)
PIA6821(config, m_pia, 0);
m_pia->readpa_handler().set(FUNC(eti660_state::pia_pa_r));
m_pia->writepa_handler().set(FUNC(eti660_state::pia_pa_w));
m_pia->ca2_handler().set(FUNC(eti660_state::ca2_w)); // not working, bug in pia
m_pia->irqa_handler().set_inputline(m_maincpu, COSMAC_INPUT_LINE_INT).invert(); // FIXME: use an input merger for these lines
m_pia->irqb_handler().set_inputline(m_maincpu, COSMAC_INPUT_LINE_INT).invert();

4
src/mame/includes/eti660.h
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@ -45,13 +45,11 @@ private:
DECLARE_READ8_MEMBER( pia_r );
DECLARE_WRITE8_MEMBER( pia_w );
DECLARE_WRITE8_MEMBER( colorram_w );
DECLARE_READ_LINE_MEMBER( rdata_r );
DECLARE_READ_LINE_MEMBER( bdata_r );
DECLARE_READ_LINE_MEMBER( gdata_r );
DECLARE_READ_LINE_MEMBER( clear_r );
DECLARE_READ_LINE_MEMBER( ef2_r );
DECLARE_READ_LINE_MEMBER( ef4_r );
DECLARE_WRITE_LINE_MEMBER( q_w );
DECLARE_WRITE_LINE_MEMBER( ca2_w );
DECLARE_WRITE8_MEMBER( dma_w );
DECLARE_READ8_MEMBER( pia_pa_r );
DECLARE_WRITE8_MEMBER( pia_pa_w );