diff options
Diffstat (limited to 'src/mess/drivers/ace.c')
-rw-r--r-- | src/mess/drivers/ace.c | 698 |
1 files changed, 698 insertions, 0 deletions
diff --git a/src/mess/drivers/ace.c b/src/mess/drivers/ace.c new file mode 100644 index 00000000000..e32dead7a8b --- /dev/null +++ b/src/mess/drivers/ace.c @@ -0,0 +1,698 @@ +/*************************************************************************** +Jupiter Ace memory map + + CPU: Z80 + 0000-1fff ROM + 2000-23ff Mirror of 2400-27FF + 2400-27ff RAM (1K RAM used for screen and edit/cassette buffer) + 2800-2bff Mirror of 2C00-2FFF + 2c00-2fff RAM (1K RAM for char set, write only) + 3000-3bff Mirror of 3C00-3FFF + 3c00-3fff RAM (1K RAM standard) + 4000-7fff RAM (16K Expansion) + 8000-ffff RAM (48K Expansion) + +Interrupts: + + IRQ: + 50Hz vertical sync + +Ports: + + Out 0xfe: + Tape and buzzer + + In 0xfe: + Keyboard input, tape, and buzzer + + http://www.jupiter-ace.co.uk/ + +***************************************************************************/ + +/* + + TODO: + + - Ace Colour Board + - 96K ram expansion + - Deep Thought disc interface (6850, 6821) + +*/ + + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "formats/ace_ace.h" +#include "formats/ace_tap.h" +#include "imagedev/cassette.h" +#include "imagedev/snapquik.h" +#include "machine/ctronics.h" +#include "machine/i8255.h" +#include "machine/ram.h" +#include "machine/z80pio.h" +#include "sound/ay8910.h" +#include "sound/sp0256.h" +#include "sound/speaker.h" +#include "sound/wave.h" +#include "includes/ace.h" + + + +//************************************************************************** +// READ/WRITE HANDLERS +//************************************************************************** + +//------------------------------------------------- +// io_r - +//------------------------------------------------- + +READ8_MEMBER( ace_state::io_r ) +{ + UINT8 data = 0xff; + + if (!BIT(offset, 8)) data &= ioport("A8")->read(); + if (!BIT(offset, 9)) data &= ioport("A9")->read(); + if (!BIT(offset, 10)) data &= ioport("A10")->read(); + if (!BIT(offset, 11)) data &= ioport("A11")->read(); + if (!BIT(offset, 12)) data &= ioport("A12")->read(); + if (!BIT(offset, 13)) data &= ioport("A13")->read(); + if (!BIT(offset, 14)) data &= ioport("A14")->read(); + + if (!BIT(offset, 15)) + { + data &= ioport("A15")->read(); + + m_cassette->output(-1); + speaker_level_w(m_speaker, 0); + } + + if (m_cassette->input() > 0) + { + data &= ~0x20; + } + + return data; +} + + +//------------------------------------------------- +// io_w - +//------------------------------------------------- + +WRITE8_MEMBER( ace_state::io_w ) +{ + m_cassette->output(1); + speaker_level_w(m_speaker, 1); +} + + +//------------------------------------------------- +// ppi_r - +//------------------------------------------------- + +READ8_MEMBER( ace_state::ppi_pa_r ) +{ + return m_ppi->read(space, 0); +} + +READ8_MEMBER( ace_state::ppi_pb_r ) +{ + return m_ppi->read(space, 1); +} + +READ8_MEMBER( ace_state::ppi_pc_r ) +{ + return m_ppi->read(space, 2); +} + +READ8_MEMBER( ace_state::ppi_control_r ) +{ + return m_ppi->read(space, 3); +} + + +//------------------------------------------------- +// ppi_w - +//------------------------------------------------- + +WRITE8_MEMBER( ace_state::ppi_pa_w ) +{ + m_ppi->write(space, 0, data); +} + +WRITE8_MEMBER( ace_state::ppi_pb_w ) +{ + m_ppi->write(space, 1, data); +} + +WRITE8_MEMBER( ace_state::ppi_pc_w ) +{ + m_ppi->write(space, 2, data); +} + +WRITE8_MEMBER( ace_state::ppi_control_w ) +{ + m_ppi->write(space, 3, data); +} + + +//------------------------------------------------- +// pio_r - +//------------------------------------------------- + +static READ8_DEVICE_HANDLER( pio_ad_r ) +{ + return dynamic_cast<z80pio_device*>(device)->data_read(0); +} + +static READ8_DEVICE_HANDLER( pio_bd_r ) +{ + return dynamic_cast<z80pio_device*>(device)->data_read(1); +} + +static READ8_DEVICE_HANDLER( pio_ac_r ) +{ + return dynamic_cast<z80pio_device*>(device)->control_read(); +} + +static READ8_DEVICE_HANDLER( pio_bc_r ) +{ + return dynamic_cast<z80pio_device*>(device)->control_read(); +} + + +//------------------------------------------------- +// pio_w - +//------------------------------------------------- + +static WRITE8_DEVICE_HANDLER( pio_ad_w ) +{ + dynamic_cast<z80pio_device*>(device)->data_write(0, data); +} + +static WRITE8_DEVICE_HANDLER( pio_bd_w ) +{ + dynamic_cast<z80pio_device*>(device)->data_write(1, data); +} + +static WRITE8_DEVICE_HANDLER( pio_ac_w ) +{ + dynamic_cast<z80pio_device*>(device)->control_write(0, data); +} + +static WRITE8_DEVICE_HANDLER( pio_bc_w ) +{ + dynamic_cast<z80pio_device*>(device)->control_write(1, data); +} + + + +//************************************************************************** +// ADDRESS MAPS +//************************************************************************** + +//------------------------------------------------- +// ADDRESS_MAP( ace_mem ) +//------------------------------------------------- + +static ADDRESS_MAP_START( ace_mem, AS_PROGRAM, 8, ace_state ) + AM_RANGE(0x0000, 0x1fff) AM_ROM + AM_RANGE(0x2000, 0x23ff) AM_MIRROR(0x0400) AM_RAM AM_SHARE("video_ram") + AM_RANGE(0x2800, 0x2bff) AM_MIRROR(0x0400) AM_RAM AM_SHARE("char_ram") AM_REGION(Z80_TAG, 0xfc00) + AM_RANGE(0x3000, 0x33ff) AM_MIRROR(0x0c00) AM_RAM + AM_RANGE(0x4000, 0xffff) AM_RAM +ADDRESS_MAP_END + + +//------------------------------------------------- +// ADDRESS_MAP( ace_io ) +//------------------------------------------------- + +static ADDRESS_MAP_START( ace_io, AS_IO, 8, ace_state ) + AM_RANGE(0x00, 0x00) AM_MIRROR(0xfffe) AM_MASK(0xff00) AM_READWRITE(io_r, io_w) + AM_RANGE(0x01, 0x01) AM_MIRROR(0xff00) AM_READ_PORT("JOY") + AM_RANGE(0x41, 0x41) AM_MIRROR(0xff80) AM_READWRITE(ppi_pa_r, ppi_pa_w) + AM_RANGE(0x43, 0x43) AM_MIRROR(0xff80) AM_READWRITE(ppi_pb_r, ppi_pb_w) + AM_RANGE(0x45, 0x45) AM_MIRROR(0xff80) AM_READWRITE(ppi_pc_r, ppi_pc_w) + AM_RANGE(0x47, 0x47) AM_MIRROR(0xff80) AM_READWRITE(ppi_control_r, ppi_control_w) + AM_RANGE(0x81, 0x81) AM_MIRROR(0xff38) AM_DEVREADWRITE_LEGACY(Z80PIO_TAG, pio_ad_r, pio_ad_w) + AM_RANGE(0x83, 0x83) AM_MIRROR(0xff38) AM_DEVREADWRITE_LEGACY(Z80PIO_TAG, pio_bd_r, pio_bd_w) + AM_RANGE(0x85, 0x85) AM_MIRROR(0xff38) AM_DEVREADWRITE_LEGACY(Z80PIO_TAG, pio_ac_r, pio_ac_w) + AM_RANGE(0x87, 0x87) AM_MIRROR(0xff38) AM_DEVREADWRITE_LEGACY(Z80PIO_TAG, pio_bc_r, pio_bc_w) + AM_RANGE(0xfd, 0xfd) AM_MIRROR(0xff00) AM_DEVWRITE_LEGACY(AY8910_TAG, ay8910_address_w) + AM_RANGE(0xff, 0xff) AM_MIRROR(0xff00) AM_DEVREADWRITE_LEGACY(AY8910_TAG, ay8910_r, ay8910_data_w) +ADDRESS_MAP_END + + + +//************************************************************************** +// INPUT PORTS +//************************************************************************** + +//------------------------------------------------- +// INPUT_PORTS( ace ) +//------------------------------------------------- + +static INPUT_PORTS_START( ace ) + PORT_START("A8") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Symbol Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_2) + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_CHAR(':') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_CHAR('\xA3') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_CHAR('?') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A9") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_CHAR('~') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_CHAR('|') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_CHAR('\\') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_CHAR('{') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') PORT_CHAR('}') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A10") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_CHAR('<') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_CHAR('>') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A11") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CODE(KEYCODE_LEFT) PORT_CHAR('5') PORT_CHAR('%') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A12") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('_') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR('8') PORT_CHAR('(') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CODE(KEYCODE_DOWN) PORT_CHAR('7') PORT_CHAR('\'') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CODE(KEYCODE_UP) PORT_CHAR('6') PORT_CHAR('&') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A13") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_CHAR('"') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') PORT_CHAR(';') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') PORT_CHAR(0x00A9) + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') PORT_CHAR(']') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_CHAR('[') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A14") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') PORT_CHAR('=') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_CHAR('+') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_CHAR('-') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("h H \xE2\x86\x91") PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("A15") + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') PORT_CHAR('.') + PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') PORT_CHAR(',') + PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR('*') + PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_CHAR('/') + PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) + + PORT_START("JOY") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_JOYSTICK_UP ) + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICK_DOWN ) + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_JOYSTICK_RIGHT ) + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_JOYSTICK_LEFT ) + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_BUTTON1 ) + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED ) +INPUT_PORTS_END + + + +//************************************************************************** +// VIDEO +//************************************************************************** + +//------------------------------------------------- +// gfx_layout ace_charlayout +//------------------------------------------------- + +static const gfx_layout ace_charlayout = +{ + 8,8, + 128, + 1, + { RGN_FRAC(0,1) }, + { STEP8(0,1) }, + { STEP8(0,8) }, + 8*8 +}; + + +//------------------------------------------------- +// GFXDECODE( ace ) +//------------------------------------------------- + +static GFXDECODE_START( ace ) + GFXDECODE_ENTRY( Z80_TAG, 0xfc00, ace_charlayout, 0, 1 ) +GFXDECODE_END + + +//------------------------------------------------- +// TIMER_DEVICE_CALLBACK( set_irq ) +//------------------------------------------------- + +static TIMER_DEVICE_CALLBACK( set_irq ) +{ + cputag_set_input_line(timer.machine(), Z80_TAG, INPUT_LINE_IRQ0, ASSERT_LINE); +} + + +//------------------------------------------------- +// TIMER_DEVICE_CALLBACK( clear_irq ) +//------------------------------------------------- + +static TIMER_DEVICE_CALLBACK( clear_irq ) +{ + cputag_set_input_line(timer.machine(), Z80_TAG, INPUT_LINE_IRQ0, CLEAR_LINE); +} + + +//------------------------------------------------- +// SCREEN_UPDATE_IND16( ace ) +//------------------------------------------------- + +UINT32 ace_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + UINT8 y,ra,chr,gfx; + UINT16 sy=56,ma=0,x; + + for (y = 0; y < 24; y++) + { + for (ra = 0; ra < 8; ra++) + { + UINT16 *p = &bitmap.pix16(sy++, 40); + + for (x = ma; x < ma+32; x++) + { + chr = m_video_ram[x]; + + /* get pattern of pixels for that character scanline */ + gfx = m_char_ram[((chr&0x7f)<<3) | ra] ^ (BIT(chr, 7) ? 0xff : 0); + + /* Display a scanline of a character (8 pixels) */ + *p++ = BIT(gfx, 7); + *p++ = BIT(gfx, 6); + *p++ = BIT(gfx, 5); + *p++ = BIT(gfx, 4); + *p++ = BIT(gfx, 3); + *p++ = BIT(gfx, 2); + *p++ = BIT(gfx, 1); + *p++ = BIT(gfx, 0); + } + } + ma+=32; + } + return 0; +} + + + +//************************************************************************** +// DEVICE CONFIGURATION +//************************************************************************** + +//------------------------------------------------- +// cassette_interface ace_cassette_interface +//------------------------------------------------- + +static const cassette_interface ace_cassette_interface = +{ + ace_cassette_formats, + NULL, + (cassette_state)(CASSETTE_STOPPED), + NULL, + NULL +}; + + +//------------------------------------------------- +// ay8910_interface psg_intf +//------------------------------------------------- + +static const ay8910_interface psg_intf = +{ + AY8910_LEGACY_OUTPUT, + AY8910_DEFAULT_LOADS, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL +}; + + +//------------------------------------------------- +// sp0256_interface sp0256_intf +//------------------------------------------------- + +static const sp0256_interface sp0256_intf = +{ + DEVCB_NULL, + DEVCB_NULL +}; + + +//------------------------------------------------- +// I8255A_INTERFACE( ppi_intf ) +//------------------------------------------------- + +static READ8_DEVICE_HANDLER( sby_r ) +{ + /* + + bit description + + PC0 SP0256 SBY + PC1 + PC2 + PC3 + PC4 + PC5 + PC6 + PC7 + + */ + + return sp0256_sby_r(device); +} + +static WRITE8_DEVICE_HANDLER( ald_w ) +{ + /* + + bit description + + PA0 SP0256 A1 + PA1 SP0256 A2 + PA2 SP0256 A3 + PA3 SP0256 A4 + PA4 SP0256 A5 + PA5 SP0256 A6 + PA6 SP0256 _ALD + PA7 + + */ + + if (!BIT(data, 6)) + { + sp0256_ALD_w(device, 0, data & 0x3f); + } +} + +static I8255A_INTERFACE( ppi_intf ) +{ + DEVCB_NULL, + DEVCB_NULL, + DEVCB_DEVICE_HANDLER(SP0256AL2_TAG, sby_r), + DEVCB_DEVICE_HANDLER(SP0256AL2_TAG, ald_w), + DEVCB_NULL, + DEVCB_NULL +}; + + +//------------------------------------------------- +// Z80PIO_INTERFACE( pio_intf ) +//------------------------------------------------- + +READ8_MEMBER( ace_state::pio_pa_r ) +{ + /* + + bit description + + PA0 + PA1 RxD + PA2 + PA3 + PA4 + PA5 + PA6 + PA7 + + */ + + return 0; +}; + +WRITE8_MEMBER( ace_state::pio_pa_w ) +{ + /* + + bit description + + PA0 RTS + PA1 + PA2 CTS + PA3 TxD + PA4 + PA5 + PA6 STB + PA7 + + */ + + // centronics strobe + m_centronics->strobe_w(!BIT(data, 6)); +}; + +static Z80PIO_INTERFACE( pio_intf ) +{ + DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0), + DEVCB_DRIVER_MEMBER(ace_state, pio_pa_r), + DEVCB_DRIVER_MEMBER(ace_state, pio_pa_w), + DEVCB_NULL, + DEVCB_NULL, + DEVCB_DEVICE_MEMBER(CENTRONICS_TAG, centronics_device, write), + DEVCB_NULL +}; + + + +//************************************************************************** +// MACHINE INITIALIZATION +//************************************************************************** + +//------------------------------------------------- +// MACHINE_START( ace ) +//------------------------------------------------- + +void ace_state::machine_start() +{ + address_space *program = m_maincpu->memory().space(AS_PROGRAM); + + /* configure RAM */ + switch (m_ram->size()) + { + case 1*1024: + program->unmap_readwrite(0x4000, 0xffff); + break; + + case 16*1024: + program->unmap_readwrite(0x8000, 0xffff); + break; + + case 32*1024: + program->unmap_readwrite(0xc000, 0xffff); + break; + } +} + + + +//************************************************************************** +// MACHINE CONFIGURATION +//************************************************************************** + +//------------------------------------------------- +// MACHINE_CONFIG( ace ) +//------------------------------------------------- + +static MACHINE_CONFIG_START( ace, ace_state ) + // basic machine hardware + MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_6_5MHz/2) + MCFG_CPU_PROGRAM_MAP(ace_mem) + MCFG_CPU_IO_MAP(ace_io) + MCFG_QUANTUM_TIME(attotime::from_hz(60)) + + // video hardware + MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) + MCFG_SCREEN_UPDATE_DRIVER(ace_state, screen_update) + MCFG_SCREEN_RAW_PARAMS(XTAL_6_5MHz, 416, 0, 336, 312, 0, 304) + MCFG_TIMER_ADD_SCANLINE("set_irq", set_irq, SCREEN_TAG, 31*8, 264) + MCFG_TIMER_ADD_SCANLINE("clear_irq", clear_irq, SCREEN_TAG, 32*8, 264) + + MCFG_PALETTE_LENGTH(2) + MCFG_PALETTE_INIT(black_and_white) + + MCFG_GFXDECODE(ace) + + // sound hardware + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_WAVE_ADD(WAVE_TAG, CASSETTE_TAG) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + MCFG_SOUND_ADD(SPEAKER_TAG, SPEAKER_SOUND, 0) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00) + + MCFG_SOUND_ADD(AY8910_TAG, AY8910, XTAL_6_5MHz/2) + MCFG_SOUND_CONFIG(psg_intf) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + + MCFG_SOUND_ADD(SP0256AL2_TAG, SP0256, XTAL_3MHz) + MCFG_SOUND_CONFIG(sp0256_intf) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + + // devices + MCFG_CASSETTE_ADD(CASSETTE_TAG, ace_cassette_interface) + MCFG_SNAPSHOT_ADD("snapshot", ace, "ace", 1) + MCFG_I8255A_ADD(I8255_TAG, ppi_intf) + MCFG_Z80PIO_ADD(Z80PIO_TAG, XTAL_6_5MHz/2, pio_intf) + MCFG_CENTRONICS_PRINTER_ADD(CENTRONICS_TAG, standard_centronics) + + // internal ram + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("1K") + MCFG_RAM_EXTRA_OPTIONS("16K,32K,48K") +MACHINE_CONFIG_END + + + +//************************************************************************** +// ROMS +//************************************************************************** + +//------------------------------------------------- +// ROM( ace ) +//------------------------------------------------- + +ROM_START( jupace ) + ROM_REGION( 0x10000, Z80_TAG, 0 ) + ROM_LOAD( "rom-a.z1", 0x0000, 0x1000, CRC(dc8438a5) SHA1(8fa97eb71e5dd17c7d190c6587ee3840f839347c) ) + ROM_LOAD( "rom-b.z2", 0x1000, 0x1000, CRC(4009f636) SHA1(98c5d4bcd74bcf014268cf4c00b2007ea5cc21f3) ) + + ROM_REGION( 0x1000, "fdc", 0 ) // Deep Thought disc interface + ROM_LOAD( "dos 4.bin", 0x0000, 0x1000, CRC(04c70448) SHA1(53ddcced6ae2feafd687a3b55864726656b71412) ) + + ROM_REGION( 0x10000, SP0256AL2_TAG, 0 ) + ROM_LOAD( "sp0256-al2.ic1", 0x000, 0x800, CRC(b504ac15) SHA1(e60fcb5fa16ff3f3b69d36c7a6e955744d3feafc) ) +ROM_END + + + +//************************************************************************** +// SYSTEM DRIVERS +//************************************************************************** + +// YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS +COMP( 1981, jupace, 0, 0, ace, ace, driver_device, 0, "Jupiter Cantab", "Jupiter Ace" , 0 ) |