diff options
Diffstat (limited to 'src/mame/drivers/elf.c')
-rw-r--r-- | src/mame/drivers/elf.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/src/mame/drivers/elf.c b/src/mame/drivers/elf.c new file mode 100644 index 00000000000..5fdfc47035b --- /dev/null +++ b/src/mame/drivers/elf.c @@ -0,0 +1,288 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/*************************************************************************** + + Netronics Elf II + +****************************************************************************/ + +/* + + TODO: + + - proper layout + +*/ + +#include "includes/elf.h" +#include "elf2.lh" + +#define RUN \ + BIT(m_special->read(), 0) + +#define LOAD \ + BIT(m_special->read(), 1) + +#define MEMORY_PROTECT \ + BIT(m_special->read(), 2) + +#define INPUT \ + BIT(m_special->read(), 3) + +/* Read/Write Handlers */ + +READ8_MEMBER( elf2_state::dispon_r ) +{ + m_vdc->disp_on_w(1); + m_vdc->disp_on_w(0); + + return 0xff; +} + +READ8_MEMBER( elf2_state::data_r ) +{ + return m_data; +} + +WRITE8_MEMBER( elf2_state::data_w ) +{ + m_led_l->a_w(data & 0x0f); + m_led_h->a_w(data >> 4); +} + +WRITE8_MEMBER( elf2_state::memory_w ) +{ + if (LOAD) + { + if (MEMORY_PROTECT) + { + /* latch data from memory */ + data = m_ram->pointer()[offset]; + } + else + { + /* write latched data to memory */ + m_ram->pointer()[offset] = data; + } + + /* write data to 7 segment displays */ + m_led_l->a_w(data & 0x0f); + m_led_h->a_w(data >> 4); + } +} + +/* Memory Maps */ + +static ADDRESS_MAP_START( elf2_mem, AS_PROGRAM, 8, elf2_state ) + ADDRESS_MAP_UNMAP_HIGH + ADDRESS_MAP_GLOBAL_MASK(0xff) + AM_RANGE(0x0000, 0x00ff) AM_RAMBANK("bank1") +ADDRESS_MAP_END + +static ADDRESS_MAP_START( elf2_io, AS_IO, 8, elf2_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x01, 0x01) AM_READ(dispon_r) + AM_RANGE(0x04, 0x04) AM_READWRITE(data_r, data_w) +ADDRESS_MAP_END + +/* Input Ports */ + +INPUT_CHANGED_MEMBER( elf2_state::input_w ) +{ + if (newval) + { + /* assert DMAIN */ + m_maincpu->set_input_line(COSMAC_INPUT_LINE_DMAIN, ASSERT_LINE); + } +} + +static INPUT_PORTS_START( elf2 ) + PORT_START("X1") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("X2") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("X3") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("X4") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("SPECIAL") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("RUN") PORT_CODE(KEYCODE_R) PORT_TOGGLE + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LOAD") PORT_CODE(KEYCODE_L) PORT_TOGGLE + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("M/P") PORT_CODE(KEYCODE_M) PORT_TOGGLE + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("INPUT") PORT_CODE(KEYCODE_ENTER) PORT_CHANGED_MEMBER(DEVICE_SELF, elf2_state, input_w, 0) +INPUT_PORTS_END + +/* CDP1802 Configuration */ + +READ_LINE_MEMBER( elf2_state::wait_r ) +{ + return LOAD; +} + +READ_LINE_MEMBER( elf2_state::clear_r ) +{ + return RUN; +} + +READ_LINE_MEMBER( elf2_state::ef4_r ) +{ + return INPUT; +} + +WRITE_LINE_MEMBER( elf2_state::q_w ) +{ + output_set_led_value(0, state); +} + +READ8_MEMBER( elf2_state::dma_r ) +{ + return m_data; +} + +WRITE8_MEMBER( elf2_state::sc_w ) +{ + switch (data) + { + case COSMAC_STATE_CODE_S2_DMA: + case COSMAC_STATE_CODE_S3_INTERRUPT: + /* clear DMAIN */ + m_maincpu->set_input_line(COSMAC_INPUT_LINE_DMAIN, CLEAR_LINE); + break; + + default: + break; + } +} + +/* MM74C923 Interface */ + +WRITE_LINE_MEMBER( elf2_state::da_w ) +{ + if (state) + { + /* shift keyboard data to latch */ + m_data <<= 4; + m_data |= m_kb->read() & 0x0f; + + if (LOAD) + { + /* write data to 7 segment displays */ + m_led_l->a_w(m_data & 0x0f); + m_led_h->a_w(m_data >> 4); + } + } +} + +/* Machine Initialization */ + +void elf2_state::machine_start() +{ + address_space &program = m_maincpu->space(AS_PROGRAM); + + /* initialize LED displays */ + m_led_l->rbi_w(1); + m_led_h->rbi_w(1); + + /* setup memory banking */ + program.install_read_bank(0x0000, 0x00ff, "bank1"); + program.install_write_handler(0x0000, 0x00ff, write8_delegate(FUNC(elf2_state::memory_w), this)); + membank("bank1")->configure_entry(0, m_ram->pointer()); + membank("bank1")->set_entry(0); + + /* register for state saving */ + save_item(NAME(m_data)); +} + +/* Machine Driver */ + +QUICKLOAD_LOAD_MEMBER( elf2_state, elf ) +{ + int size = image.length(); + + if (size > m_ram->size()) + { + return IMAGE_INIT_FAIL; + } + + image.fread(m_ram->pointer(), size); + + return IMAGE_INIT_PASS; +} + +static MACHINE_CONFIG_START( elf2, elf2_state ) + /* basic machine hardware */ + MCFG_CPU_ADD(CDP1802_TAG, CDP1802, XTAL_3_579545MHz/2) + MCFG_CPU_PROGRAM_MAP(elf2_mem) + MCFG_CPU_IO_MAP(elf2_io) + MCFG_COSMAC_WAIT_CALLBACK(READLINE(elf2_state, wait_r)) + MCFG_COSMAC_CLEAR_CALLBACK(READLINE(elf2_state, clear_r)) + MCFG_COSMAC_EF4_CALLBACK(READLINE(elf2_state, ef4_r)) + MCFG_COSMAC_Q_CALLBACK(WRITELINE(elf2_state, q_w)) + MCFG_COSMAC_DMAR_CALLBACK(READ8(elf2_state, dma_r)) + MCFG_COSMAC_DMAW_CALLBACK(DEVWRITE8(CDP1861_TAG, cdp1861_device, dma_w)) + MCFG_COSMAC_SC_CALLBACK(WRITE8(elf2_state, sc_w)) + + /* video hardware */ + MCFG_DEFAULT_LAYOUT(layout_elf2) + + MCFG_DEVICE_ADD(CDP1861_TAG, CDP1861, XTAL_3_579545MHz/2) + MCFG_CDP1861_IRQ_CALLBACK(INPUTLINE(CDP1802_TAG, COSMAC_INPUT_LINE_INT)) + MCFG_CDP1861_DMA_OUT_CALLBACK(INPUTLINE(CDP1802_TAG, COSMAC_INPUT_LINE_DMAOUT)) + MCFG_CDP1861_EFX_CALLBACK(INPUTLINE(CDP1802_TAG, COSMAC_INPUT_LINE_EF1)) + MCFG_CDP1861_SCREEN_ADD(CDP1861_TAG, SCREEN_TAG, XTAL_3_579545MHz/2) + + /* devices */ + MCFG_DEVICE_ADD(MM74C923_TAG, MM74C923, 0) + MCFG_MM74C922_OSC(CAP_U(0.15)) + MCFG_MM74C922_DEBOUNCE(CAP_U(1)) + MCFG_MM74C922_DA_CALLBACK(WRITELINE(elf2_state, da_w)) + MCFG_MM74C922_X1_CALLBACK(IOPORT("X1")) + MCFG_MM74C922_X2_CALLBACK(IOPORT("X2")) + MCFG_MM74C922_X3_CALLBACK(IOPORT("X3")) + MCFG_MM74C922_X4_CALLBACK(IOPORT("X4")) + + MCFG_DEVICE_ADD(DM9368_H_TAG, DM9368, 0) + MCFG_OUTPUT_NAME("digit0") + MCFG_DEVICE_ADD(DM9368_L_TAG, DM9368, 0) + MCFG_OUTPUT_NAME("digit1") + + MCFG_CASSETTE_ADD("cassette") + MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_MUTED) + + MCFG_QUICKLOAD_ADD("quickload", elf2_state, elf, "bin", 0) + + /* internal ram */ + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("256") +MACHINE_CONFIG_END + +/* ROMs */ + +ROM_START( elf2 ) + ROM_REGION( 0x10000, CDP1802_TAG, ROMREGION_ERASE00 ) +ROM_END + +/* System Drivers */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +COMP( 1978, elf2, 0, 0, elf2, elf2, driver_device, 0, "Netronics", "Elf II", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND) |