diff options
Diffstat (limited to 'src/mame/drivers/eti660.c')
-rw-r--r-- | src/mame/drivers/eti660.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/src/mame/drivers/eti660.c b/src/mame/drivers/eti660.c new file mode 100644 index 00000000000..80b490eff0f --- /dev/null +++ b/src/mame/drivers/eti660.c @@ -0,0 +1,244 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/* + + TODO: + + - does not boot! + - reset key + - allocate color ram + - quickload + - color on + + - keyboard not working + - foreground is black, according to the construction article it should be white. + - it is supposed to reset itself at boot, but that isn't working. You must press R. + - Pressing F3 causes it to jump into the weeds. + +*/ + +#include "includes/eti660.h" + +/* Read/Write Handlers */ + +READ8_MEMBER( eti660_state::pia_r ) +{ + int pia_offset = m_maincpu->get_memory_address() & 0x03; + + return m_pia->read(space, pia_offset); +} + +WRITE8_MEMBER( eti660_state::pia_w ) +{ + int pia_offset = m_maincpu->get_memory_address() & 0x03; + + m_pia->write(space, pia_offset, data); +} + +WRITE8_MEMBER( eti660_state::colorram_w ) +{ + int colorram_offset = m_maincpu->get_memory_address() & 0xff; + + colorram_offset = ((colorram_offset & 0xf8) >> 1) || (colorram_offset & 0x03); + + m_color_ram[colorram_offset] = data; +} + +/* Memory Maps */ + +static ADDRESS_MAP_START( eti660_map, AS_PROGRAM, 8, eti660_state ) + ADDRESS_MAP_GLOBAL_MASK(0xfff) + AM_RANGE(0x0000, 0x03ff) AM_ROM + AM_RANGE(0x0400, 0x0fff) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START( eti660_io_map, AS_IO, 8, eti660_state ) + AM_RANGE(0x01, 0x01) AM_DEVREADWRITE(CDP1864_TAG, cdp1864_device, dispon_r, step_bgcolor_w) + AM_RANGE(0x02, 0x02) AM_READWRITE(pia_r, pia_w) + AM_RANGE(0x03, 0x03) AM_WRITE(colorram_w) + AM_RANGE(0x04, 0x04) AM_DEVREADWRITE(CDP1864_TAG, cdp1864_device, dispoff_r, tone_latch_w) +ADDRESS_MAP_END + +/* Input Ports */ + +static INPUT_PORTS_START( eti660 ) + PORT_START("PA0") + 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_B) PORT_CHAR('B') + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') + + PORT_START("PA1") + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') + 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_E) PORT_CHAR('E') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') + + PORT_START("PA2") + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') + 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_5) PORT_CHAR('5') + + PORT_START("PA3") + PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') + PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') + PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') + + 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 ) +{ + return BIT(m_special->read(), 0); +} + +READ_LINE_MEMBER( eti660_state::ef2_r ) +{ + return m_cassette->input() < 0; +} + +READ_LINE_MEMBER( eti660_state::ef4_r ) +{ + return BIT(m_special->read(), 1); +} + +WRITE_LINE_MEMBER( eti660_state::q_w ) +{ + /* CDP1864 audio output enable */ + m_cti->aoe_w(state); + + /* PULSE led */ + set_led_status(machine(), LED_PULSE, state); + + /* tape output */ + m_cassette->output(state ? 1.0 : -1.0); +} + +WRITE8_MEMBER( eti660_state::dma_w ) +{ + UINT8 colorram_offset = ((offset & 0xf8) >> 1) | (offset & 0x03); + + m_color = m_color_ram[colorram_offset]; + + m_cti->con_w(0); // HACK + m_cti->dma_w(space, offset, data); +} + +/* PIA6821 Interface */ + +READ8_MEMBER( eti660_state::pia_pa_r ) +{ + /* + + bit description + + PA0 keyboard row 0 + PA1 keyboard row 1 + PA2 keyboard row 2 + PA3 keyboard row 3 + PA4 keyboard column 0 + PA5 keyboard column 1 + PA6 keyboard column 2 + PA7 keyboard column 3 + + */ + + UINT8 data = 0xf0; + + if (!BIT(m_keylatch, 0)) data &= m_pa0->read(); + if (!BIT(m_keylatch, 1)) data &= m_pa1->read(); + if (!BIT(m_keylatch, 2)) data &= m_pa2->read(); + if (!BIT(m_keylatch, 3)) data &= m_pa3->read(); + + return data | m_keylatch; +} + +WRITE8_MEMBER( eti660_state::pia_pa_w ) +{ + /* + + bit description + + PA0 keyboard row 0 + PA1 keyboard row 1 + PA2 keyboard row 2 + PA3 keyboard row 3 + PA4 keyboard column 0 + PA5 keyboard column 1 + PA6 keyboard column 2 + PA7 keyboard column 3 + + */ + + m_keylatch = data & 0x0f; +} + +/* Machine Drivers */ + +static MACHINE_CONFIG_START( eti660, eti660_state ) + /* basic machine hardware */ + MCFG_CPU_ADD(CDP1802_TAG, CDP1802, XTAL_8_867238MHz/5) + MCFG_CPU_PROGRAM_MAP(eti660_map) + MCFG_CPU_IO_MAP(eti660_io_map) + MCFG_COSMAC_WAIT_CALLBACK(VCC) + MCFG_COSMAC_CLEAR_CALLBACK(READLINE(eti660_state, clear_r)) + MCFG_COSMAC_EF2_CALLBACK(READLINE(eti660_state, ef2_r)) + MCFG_COSMAC_EF4_CALLBACK(READLINE(eti660_state, ef4_r)) + MCFG_COSMAC_Q_CALLBACK(WRITELINE(eti660_state, q_w)) + MCFG_COSMAC_DMAW_CALLBACK(WRITE8(eti660_state, dma_w)) + + /* video hardware */ + MCFG_CDP1864_SCREEN_ADD(SCREEN_TAG, XTAL_8_867238MHz/5) + MCFG_SCREEN_UPDATE_DEVICE(CDP1864_TAG, cdp1864_device, screen_update) + + /* sound hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_CDP1864_ADD(CDP1864_TAG, SCREEN_TAG, XTAL_8_867238MHz/5, GND, INPUTLINE(CDP1802_TAG, COSMAC_INPUT_LINE_INT), INPUTLINE(CDP1802_TAG, COSMAC_INPUT_LINE_DMAOUT), INPUTLINE(CDP1802_TAG, COSMAC_INPUT_LINE_EF1), NULL, READLINE(eti660_state, rdata_r), READLINE(eti660_state, bdata_r), READLINE(eti660_state, gdata_r)) + MCFG_CDP1864_CHROMINANCE(RES_K(2.2), RES_K(1), RES_K(4.7), RES_K(4.7)) // R7, R5, R6, R4 + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + + /* devices */ + MCFG_DEVICE_ADD(MC6821_TAG, PIA6821, 0) + MCFG_PIA_READPA_HANDLER(READ8(eti660_state, pia_pa_r)) + MCFG_PIA_WRITEPA_HANDLER(WRITE8(eti660_state, pia_pa_w)) + + MCFG_CASSETTE_ADD("cassette") + MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_MUTED) + + /* internal ram */ + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("3K") +MACHINE_CONFIG_END + +/* ROMs */ + +ROM_START( eti660 ) + ROM_REGION( 0x10000, CDP1802_TAG, 0 ) + ROM_LOAD( "eti660.bin", 0x0000, 0x0400, CRC(811dfa62) SHA1(c0c4951e02f873f15560bdc3f35cdf3f99653922) ) +ROM_END + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +COMP( 1981, eti660, 0, 0, eti660, eti660, driver_device, 0, "Electronics Today International", "ETI-660", MACHINE_NOT_WORKING ) |