diff options
Diffstat (limited to 'src/mess/drivers/abc80.c')
-rw-r--r-- | src/mess/drivers/abc80.c | 864 |
1 files changed, 864 insertions, 0 deletions
diff --git a/src/mess/drivers/abc80.c b/src/mess/drivers/abc80.c new file mode 100644 index 00000000000..f33d962e58a --- /dev/null +++ b/src/mess/drivers/abc80.c @@ -0,0 +1,864 @@ +/* + +Luxor ABC 80 + +PCB Layout +---------- + +55 10470-02 + + CN1 CN2 CN5 + SW1 |-----| |------------------------| |-----| +|-------| |--| |----------------------------------| |---| +| CN3 CN4 | +| 7912 | +| MC1488 | +| MC1489 7812 | +| LS245 LS138 | +| |-------| | +| |-----CN6-----| LS241 LS241 LS138 LS32 |SN76477| LS04 LM339 | +| |-------| | +| |--------------| |------------| PROM0 LS132 LS273 7406 LS08 | +| | Z80A PIO | | Z80A | | +| |--------------| |------------| LS04 LS74A LS86 LS161 LS166 74393 | +| | +| ROM3 LS107 4116 4116 LS10 LS257 LS74A LS08 LS107 PROM2 | +| | +| ROM2 LS257 4116 4116 LS139 74393 LS107 LS32 LS175 74393 | +| | +| ROM1 LS257 4116 4116 LS08 LS283 LS10 LS32 PROM1 74393 | +| | +| ROM0 LS257 4116 4116 LS257 74393 LS375 74S263 LS145 PROM4 | +| | +| DIPSW1 DIPSW2 4045 4045 LS257 LS245 LS375 LS273 LS166 PROM3 | +|--------------------------------------------------------------------------------------| + +Notes: + All IC's shown. + + ROM0-3 - Texas Instruments TMS4732 4Kx8 General Purpose Mask Programmable ROM + PROM0-2 - Philips Semiconductors N82S129 256x4 TTL Bipolar PROM + PROM3-4 - Philips Semiconductors N82S131 512x4 TTL Bipolar PROM + 4116 - Texas Instruments TMS4116-25 16Kx1 Dynamic RAM + 4045 - Texas Instruments TMS4045-15 1Kx4 General Purpose Static RAM with Multiplexed I/O + Z80A - Sharp LH0080A Z80A CPU + Z80APIO - SGS-Thomson Z8420AB1 Z80A PIO + SN76477 - Texas Instruments SN76477N Complex Sound Generator + 74S263 - Texas Instruments SN74S263N Row Output Character Generator + MC1488 - Texas Instruments MC1488 Quadruple Line Driver + MC1489 - Texas Instruments MC1489 Quadruple Line Receiver + CN1 - RS-232 connector + CN2 - ABC bus connector (DIN 41612) + CN3 - video connector + CN4 - cassette motor connector + CN5 - cassette connector + CN6 - keyboard connector + SW1 - reset switch + DIPSW1 - + DIPSW2 - + +*/ + +/* + + TODO: + + - cassette interrupt routine samples the latch too soon + - proper keyboard controller emulation + - MyAB 80-column card + - GeJo 80-column card + - Mikrodatorn 64K expansion + - floppy + - printer + - IEC + - Metric ABC CAD 1000 + +*/ + +#include "includes/abc80.h" + + + +//************************************************************************** +// MACROS / CONSTANTS +//************************************************************************** + +#define MMU_XM 0x01 +#define MMU_ROM 0x02 +#define MMU_VRAMS 0x04 +#define MMU_RAM 0x08 + + + +//************************************************************************** +// KEYBOARD HACK +//************************************************************************** + +static INPUT_PORTS_START( fake_keyboard ) + PORT_START("ROW0") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("4 \xC2\xA4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR(0x00A4) + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('/') + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') + + PORT_START("ROW1") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('=') + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('+') PORT_CHAR('?') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(0x00E9) PORT_CHAR(0x00C9) + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('<') PORT_CHAR('>') + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') + + PORT_START("ROW2") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR(0x00E5) PORT_CHAR(0x00C5) + + PORT_START("ROW3") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(0x00FC) PORT_CHAR(0x00DC) + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('\r') + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') + + PORT_START("ROW4") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(0x00F6) PORT_CHAR(0x00D6) + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(0x00E4) PORT_CHAR(0x00C4) + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\'') PORT_CHAR('*') + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME(UTF8_LEFT) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') + + PORT_START("ROW5") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR(';') + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR(':') + + PORT_START("ROW6") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('-') PORT_CHAR('_') + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME(UTF8_RIGHT) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED ) + + PORT_START("ROW7") + PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LEFT SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("RIGHT SHIFT") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("UPPER CASE") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_TOGGLE + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL)) + PORT_BIT( 0x10, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_UNUSED ) + PORT_BIT( 0x80, IP_ACTIVE_HIGH, IPT_UNUSED ) +INPUT_PORTS_END + +static const UINT8 abc80_keycodes[7*4][8] = +{ + /* unshifted */ + { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38 }, + { 0x39, 0x30, 0x2B, 0x60, 0x3C, 0x71, 0x77, 0x65 }, + { 0x72, 0x74, 0x79, 0x75, 0x69, 0x6F, 0x70, 0x7D }, + { 0x7E, 0x0D, 0x61, 0x73, 0x64, 0x66, 0x67, 0x68 }, + { 0x6A, 0x6B, 0x6C, 0x7C, 0x7B, 0x27, 0x08, 0x7A }, + { 0x78, 0x63, 0x76, 0x62, 0x6E, 0x6D, 0x2C, 0x2E }, + { 0x2D, 0x09, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00 }, + + /* shift */ + { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x2f, 0x28 }, + { 0x29, 0x3d, 0x3f, 0x40, 0x3e, 0x51, 0x57, 0x45 }, + { 0x52, 0x54, 0x59, 0x55, 0x49, 0x4f, 0x50, 0x5d }, + { 0x5e, 0x0d, 0x41, 0x53, 0x44, 0x46, 0x47, 0x48 }, + { 0x4a, 0x4b, 0x4c, 0x5c, 0x5b, 0x2a, 0x08, 0x5a }, + { 0x58, 0x43, 0x56, 0x42, 0x4e, 0x4d, 0x3b, 0x3a }, + { 0x5f, 0x09, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00 }, + + /* control */ + { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38 }, + { 0x39, 0x30, 0x2b, 0x00, 0x7f, 0x11, 0x17, 0x05 }, + { 0x12, 0x14, 0x19, 0x15, 0x09, 0x0f, 0x10, 0x1d }, + { 0x1e, 0x0d, 0x01, 0x13, 0x04, 0x06, 0x07, 0x08 }, + { 0x0a, 0x0b, 0x0c, 0x1c, 0x1b, 0x27, 0x08, 0x1a }, + { 0x18, 0x03, 0x16, 0x02, 0x0e, 0x0d, 0x2c, 0x2e }, + { 0x2d, 0x09, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00 }, + + /* control-shift */ + { 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x2f, 0x28 }, + { 0x29, 0x3d, 0x3f, 0x00, 0x7f, 0x11, 0x17, 0x05 }, + { 0x12, 0x14, 0x19, 0x15, 0x09, 0x1f, 0x00, 0x1d }, + { 0x1e, 0x0d, 0x01, 0x13, 0x04, 0x06, 0x07, 0x08 }, + { 0x0a, 0x1b, 0x1c, 0x1c, 0x1b, 0x2a, 0x08, 0x1a }, + { 0x18, 0x03, 0x16, 0x02, 0x1e, 0x1d, 0x3b, 0x3a }, + { 0x5f, 0x09, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00 } +}; + +void abc80_state::scan_keyboard() +{ + static const char *const keynames[] = { "ROW0", "ROW1", "ROW2", "ROW3", "ROW4", "ROW5", "ROW6" }; + int table = 0, row, col; + + if (ioport("ROW7")->read() & 0x07) + { + /* shift, upper case */ + table |= 0x01; + } + + if (ioport("ROW7")->read() & 0x08) + { + /* ctrl */ + table |= 0x02; + } + + /* clear key strobe */ + m_key_strobe = 0; + + /* scan keyboard */ + for (row = 0; row < 7; row++) + { + UINT8 data = ioport(keynames[row])->read(); + + for (col = 0; col < 8; col++) + { + if (BIT(data, col)) + { + UINT8 keydata = abc80_keycodes[row + (table * 7)][col]; + + /* set key strobe */ + m_key_strobe = 1; + + if (m_key_data != keydata) + { + UINT8 pio_data = 0x80 | keydata; + + /* latch key data */ + m_key_data = keydata; + + m_pio->port_a_write(pio_data); + return; + } + } + } + } + + if (!m_key_strobe && m_key_data) + { + m_pio->port_a_write(m_key_data); + + timer_set(attotime::from_msec(50), TIMER_ID_FAKE_KEYBOARD_CLEAR); + } +} + + + +//************************************************************************** +// MEMORY MANAGEMENT +//************************************************************************** + +//------------------------------------------------- +// read - +//------------------------------------------------- + +READ8_MEMBER( abc80_state::read ) +{ + UINT8 data = 0xff; + UINT8 mmu = m_mmu_rom[0x40 | (offset >> 10)]; + + if (!(mmu & MMU_XM)) + { + data = m_bus->xmemfl_r(space, offset); + } + else if (!(mmu & MMU_ROM)) + { + data = memregion(Z80_TAG)->base()[offset & 0x3fff]; + } + else if (mmu & MMU_VRAMS) + { + data = m_video_ram[offset & 0x3ff]; + } + else if (!(mmu & MMU_RAM)) + { + data = m_ram->pointer()[offset & 0x3fff]; + } + + return data; +} + + +//------------------------------------------------- +// write - +//------------------------------------------------- + +WRITE8_MEMBER( abc80_state::write ) +{ + UINT8 mmu = m_mmu_rom[0x40 | (offset >> 10)]; + + if (!(mmu & MMU_XM)) + { + m_bus->xmemw_w(space, offset, data); + } + else if (mmu & MMU_VRAMS) + { + m_video_ram[offset & 0x3ff] = data; + } + else if (!(mmu & MMU_RAM)) + { + m_ram->pointer()[offset & 0x3fff] = data; + } +} + + + +//************************************************************************** +// SOUND +//************************************************************************** + +//------------------------------------------------- +// vco_voltage_w - CSG VCO voltage select +//------------------------------------------------- + +WRITE_LINE_MEMBER( abc80_state::vco_voltage_w ) +{ + sn76477_vco_voltage_w(m_psg, state ? 2.5 : 0); +} + + + +//************************************************************************** +// ADDRESS MAPS +//************************************************************************** + +//------------------------------------------------- +// ADDRESS_MAP( abc80_mem ) +//------------------------------------------------- + +static ADDRESS_MAP_START( abc80_mem, AS_PROGRAM, 8, abc80_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x0000, 0xffff) AM_READWRITE(read, write) +ADDRESS_MAP_END + + +//------------------------------------------------- +// ADDRESS_MAP( abc80_io ) +//------------------------------------------------- + +static ADDRESS_MAP_START( abc80_io, AS_IO, 8, abc80_state ) + ADDRESS_MAP_UNMAP_HIGH + ADDRESS_MAP_GLOBAL_MASK(0x17) + AM_RANGE(0x00, 0x00) AM_DEVREADWRITE(ABCBUS_TAG, abcbus_slot_device, inp_r, utp_w) + AM_RANGE(0x01, 0x01) AM_DEVREADWRITE(ABCBUS_TAG, abcbus_slot_device, stat_r, cs_w) + AM_RANGE(0x02, 0x02) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c1_w) + AM_RANGE(0x03, 0x03) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c2_w) + AM_RANGE(0x04, 0x04) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c3_w) + AM_RANGE(0x05, 0x05) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c4_w) + AM_RANGE(0x06, 0x06) AM_WRITE_PORT("SN76477") + AM_RANGE(0x07, 0x07) AM_DEVREAD(ABCBUS_TAG, abcbus_slot_device, rst_r) + AM_RANGE(0x10, 0x13) AM_MIRROR(0x04) AM_DEVREADWRITE(Z80PIO_TAG, z80pio_device, read_alt, write_alt) +ADDRESS_MAP_END + + + +//************************************************************************** +// INPUT PORTS +//************************************************************************** + +//------------------------------------------------- +// INPUT_PORTS( abc80 ) +//------------------------------------------------- + +static INPUT_PORTS_START( abc80 ) + PORT_INCLUDE(fake_keyboard) + + PORT_START("SW1") + PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x01, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x04, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x20, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x80, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + + PORT_START("SW2") + PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x01, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x02, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x04, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x08, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x10, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x20, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x40, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) ) + PORT_DIPSETTING( 0x80, DEF_STR( Off ) ) + PORT_DIPSETTING( 0x00, DEF_STR( On ) ) + + PORT_START("SN76477") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_enable_w) + PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, abc80_state, vco_voltage_w) + PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_vco_w) + PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_mixer_b_w) + PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_mixer_a_w) + PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_mixer_c_w) + PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_envelope_2_w) + PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE(SN76477_TAG, sn76477_envelope_1_w) +INPUT_PORTS_END + + + +//************************************************************************** +// DEVICE CONFIGURATION +//************************************************************************** + +//------------------------------------------------- +// sn76477_interface csg_intf +//------------------------------------------------- + +static const sn76477_interface csg_intf = +{ + RES_K(47), // 4 noise_res R26 47k + RES_K(330), // 5 filter_res R24 330k + CAP_P(390), // 6 filter_cap C52 390p + RES_K(47), // 7 decay_res R23 47k + CAP_U(10), // 8 attack_decay_cap C50 10u/35V + RES_K(2.2), // 10 attack_res R21 2.2k + RES_K(33), // 11 amplitude_res R19 33k + RES_K(10), // 12 feedback_res R18 10k + 0, // 16 vco_voltage 0V or 2.5V + CAP_N(10) , // 17 vco_cap C48 10n + RES_K(100), // 18 vco_res R20 100k + 0, // 19 pitch_voltage N/C + RES_K(220), // 20 slf_res R22 220k + CAP_U(1), // 21 slf_cap C51 1u/35V + CAP_U(0.1), // 23 oneshot_cap C53 0.1u + RES_K(330) // 24 oneshot_res R25 330k +}; + + +//------------------------------------------------- +// Z80PIO_INTERFACE( pio_intf ) +//------------------------------------------------- + +READ8_MEMBER( abc80_state::pio_pa_r ) +{ + /* + + PIO Port A + + bit description + + 0 keyboard data + 1 keyboard data + 2 keyboard data + 3 keyboard data + 4 keyboard data + 5 keyboard data + 6 keyboard data + 7 keyboard strobe + + */ + + UINT8 data = 0; + + //data |= m_kb->data_r(); + data |= m_key_data; + data |= (m_key_strobe << 7); + + return data; +}; + +READ8_MEMBER( abc80_state::pio_pb_r ) +{ + /* + + PIO Channel B + + 0 R RS-232C RxD + 1 R RS-232C _CTS + 2 R RS-232C _DCD + 3 W RS-232C TxD + 4 W RS-232C _RTS + 5 W Cassette Motor + 6 W Cassette Data + 7 R Cassette Data + + */ + + UINT8 data = 0; + + // receive data + data |= m_rs232->rx(); + + // clear to send + data |= m_rs232->cts_r() << 1; + + // data carrier detect + data |= m_rs232->dcd_r() << 2; + + // cassette data + data |= m_tape_in_latch << 7; + + //logerror("read tape latch %u\n", m_tape_in_latch); + + return data; +}; + +WRITE8_MEMBER( abc80_state::pio_pb_w ) +{ + /* + + PIO Channel B + + 0 R RS-232C RxD + 1 R RS-232C _CTS + 2 R RS-232C _DCD + 3 W RS-232C TxD + 4 W RS-232C _RTS + 5 W Cassette Motor + 6 W Cassette Data + 7 R Cassette Data + + */ + + // transmit data + m_rs232->tx(BIT(data, 3)); + + // request to send + m_rs232->rts_w(BIT(data, 4)); + + // cassette motor + if (BIT(data, 5)) + { + m_cassette->change_state(CASSETTE_MOTOR_ENABLED, CASSETTE_MASK_MOTOR); + m_cassette_timer->enable(true); + } + else + { + m_cassette->change_state(CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR); + m_cassette_timer->enable(false); + } + + // cassette data + m_cassette->output(BIT(data, 6) ? -1.0 : +1.0); + + // cassette input latch + if (BIT(data, 6)) + { + //logerror("clear tape in latch\n"); + + m_tape_in_latch = 1; + + m_pio->port_b_write(m_tape_in_latch << 7); + } +}; + +static Z80PIO_INTERFACE( pio_intf ) +{ + DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0), /* callback when change interrupt status */ + DEVCB_DRIVER_MEMBER(abc80_state, pio_pa_r), /* port A read callback */ + DEVCB_NULL, /* port A write callback */ + DEVCB_NULL, /* portA ready active callback */ + DEVCB_DRIVER_MEMBER(abc80_state, pio_pb_r), /* port B read callback */ + DEVCB_DRIVER_MEMBER(abc80_state, pio_pb_w), /* port B write callback */ + DEVCB_NULL /* portB ready active callback */ +}; + + +//------------------------------------------------- +// Z80PIO_INTERFACE( pio_intf ) +//------------------------------------------------- + +static const z80_daisy_config abc80_daisy_chain[] = +{ + { Z80PIO_TAG }, + { NULL } +}; + + +//------------------------------------------------- +// cassette_interface abc80_cassette_interface +//------------------------------------------------- + +static const cassette_interface abc80_cassette_interface = +{ + cassette_default_formats, + NULL, + (cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_MUTED), + NULL, + NULL +}; + + +//------------------------------------------------- +// ABC80_KEYBOARD_INTERFACE( kb_intf ) +//------------------------------------------------- + +WRITE_LINE_MEMBER( abc80_state::keydown_w ) +{ + m_key_strobe = state; + + m_pio->port_a_write(m_key_strobe << 7); +} + +static ABC80_KEYBOARD_INTERFACE( kb_intf ) +{ + DEVCB_DRIVER_LINE_MEMBER(abc80_state, keydown_w) +}; + + +//------------------------------------------------- +// ABCBUS_INTERFACE( abcbus_intf ) +//------------------------------------------------- + +static ABCBUS_INTERFACE( abcbus_intf ) +{ + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL +}; + + +//------------------------------------------------- +// rs232_port_interface rs232_intf +//------------------------------------------------- + +static SLOT_INTERFACE_START( rs232_devices ) +SLOT_INTERFACE_END + +static const rs232_port_interface rs232_intf = +{ + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL +}; + + + +//************************************************************************** +// MACHINE INITIALIZATION +//************************************************************************** + +//------------------------------------------------- +// device_timer - handler timer events +//------------------------------------------------- + +void abc80_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) +{ + switch (id) + { + case TIMER_ID_PIO: + m_pio_astb = !m_pio_astb; + + m_pio->strobe_a(m_pio_astb); + break; + + case TIMER_ID_CASSETTE: + { + int tape_in = m_cassette->input() > 0; + //logerror("tape bit %u\n", tape_in); + + if (m_tape_in_latch && !m_tape_in && tape_in) + { + //logerror("-------- set tape in latch\n"); + m_tape_in_latch = 0; + + m_pio->port_b_write(m_tape_in_latch << 7); + } + + m_tape_in = tape_in; + } + break; + + case TIMER_ID_BLINK: + m_blink = !m_blink; + break; + + case TIMER_ID_VSYNC_ON: + m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); + break; + + case TIMER_ID_VSYNC_OFF: + m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); + break; + + case TIMER_ID_FAKE_KEYBOARD_SCAN: + scan_keyboard(); + break; + + case TIMER_ID_FAKE_KEYBOARD_CLEAR: + m_key_data = 0; + break; + } +} + + +//------------------------------------------------- +// MACHINE_START( abc80 ) +//------------------------------------------------- + +void abc80_state::machine_start() +{ + // start timers + m_cassette_timer = timer_alloc(TIMER_ID_CASSETTE); + m_cassette_timer->adjust(attotime::from_hz(44100), 0, attotime::from_hz(44100)); + m_cassette_timer->enable(false); + + m_kb_timer = timer_alloc(TIMER_ID_FAKE_KEYBOARD_SCAN); + m_kb_timer->adjust(attotime::from_usec(2500), 0, attotime::from_usec(2500)); + + // find memory regions + m_mmu_rom = memregion("mmu")->base(); + + // register for state saving + save_item(NAME(m_key_data)); + save_item(NAME(m_key_strobe)); + save_item(NAME(m_pio_astb)); + save_item(NAME(m_tape_in)); + save_item(NAME(m_tape_in_latch)); +} + + + +//************************************************************************** +// MACHINE DRIVERS +//************************************************************************** + +//------------------------------------------------- +// MACHINE_CONFIG( abc80 ) +//------------------------------------------------- + +static MACHINE_CONFIG_START( abc80, abc80_state ) + // basic machine hardware + MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_11_9808MHz/2/2) // 2.9952 MHz + MCFG_CPU_PROGRAM_MAP(abc80_mem) + MCFG_CPU_IO_MAP(abc80_io) + MCFG_CPU_CONFIG(abc80_daisy_chain) + + // video hardware + MCFG_FRAGMENT_ADD(abc80_video) + + // sound hardware + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD(SN76477_TAG, SN76477, 0) + MCFG_SOUND_CONFIG(csg_intf) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + + // devices + MCFG_Z80PIO_ADD(Z80PIO_TAG, XTAL_11_9808MHz/2/2, pio_intf) + MCFG_CASSETTE_ADD(CASSETTE_TAG, abc80_cassette_interface) + MCFG_ABC80_KEYBOARD_ADD(kb_intf) + MCFG_ABCBUS_SLOT_ADD(ABCBUS_TAG, abcbus_intf, abcbus_cards, NULL, NULL) // "slow", abc830_slow) + MCFG_RS232_PORT_ADD(RS232_TAG, rs232_intf, rs232_devices, NULL, NULL) + + // internal ram + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("16K") + + // software list + MCFG_SOFTWARE_LIST_ADD("flop_list", "abc80") +MACHINE_CONFIG_END + + + +//************************************************************************** +// ROMS +//************************************************************************** + +//------------------------------------------------- +// ROM( abc80 ) +//------------------------------------------------- + +ROM_START( abc80 ) + ROM_REGION( 0x4000, Z80_TAG, 0 ) + ROM_DEFAULT_BIOS("v2") + ROM_SYSTEM_BIOS( 0, "v1", "V1" ) + ROMX_LOAD( "3506_3.a5", 0x0000, 0x1000, CRC(7c004fb6) SHA1(9aee1d085122f4537c3e6ecdab9d799bd429ef52), ROM_BIOS(1) ) + ROMX_LOAD( "3507_3.a3", 0x1000, 0x1000, CRC(d1850a84) SHA1(f7719f3af9173601a2aa23ae38ae00de1a387ad8), ROM_BIOS(1) ) + ROMX_LOAD( "3508_3.a4", 0x2000, 0x1000, CRC(b55528e9) SHA1(3e5017e8cacad1f13215242f1bbd89d1d3eee131), ROM_BIOS(1) ) + ROMX_LOAD( "3509_3.a2", 0x3000, 0x1000, CRC(659cab1e) SHA1(181db748cef22cdcccd311a60aa6189c85343db7), ROM_BIOS(1) ) + ROM_SYSTEM_BIOS( 1, "v2", "V2" ) + ROMX_LOAD( "3506_3_v2.a5", 0x0000, 0x1000, CRC(e2afbf48) SHA1(9883396edd334835a844dcaa792d29599a8c67b9), ROM_BIOS(2) ) + ROMX_LOAD( "3507_3_v2.a3", 0x1000, 0x1000, CRC(d224412a) SHA1(30968054bba7c2aecb4d54864b75a446c1b8fdb1), ROM_BIOS(2) ) + ROMX_LOAD( "3508_3_v2.a4", 0x2000, 0x1000, CRC(1502ba5b) SHA1(5df45909c2c4296e5701c6c99dfaa9b10b3a729b), ROM_BIOS(2) ) + ROMX_LOAD( "3509_3_v2.a2", 0x3000, 0x1000, CRC(bc8860b7) SHA1(28b6cf7f5a4f81e017c2af091c3719657f981710), ROM_BIOS(2) ) + + ROM_REGION( 0xa00, "chargen", 0 ) + ROM_LOAD( "sn74s263.h2", 0x0000, 0x0a00, BAD_DUMP CRC(9e064e91) SHA1(354783c8f2865f73dc55918c9810c66f3aca751f) ) // created by hand + + ROM_REGION( 0x100, "hsync", 0 ) + ROM_LOAD( "abc80_11.k5", 0x0000, 0x0100, CRC(e4f7e018) SHA1(63e718a39537f37286ea183e6469808c271dbfa5) ) // "64 40029-01" 82S129 256x4 horizontal sync + + ROM_REGION( 0x200, "vsync", 0 ) + ROM_LOAD( "abc80_21.k2", 0x0000, 0x0200, CRC(445a45b9) SHA1(bcc1c4fafe68b3500b03de785ca32abd63cea252) ) // "64 40030-01" 82S131 512x4 vertical sync + + ROM_REGION( 0x100, "attr", 0 ) + ROM_LOAD( "abc80_12.j3", 0x0000, 0x0100, CRC(6c46811c) SHA1(2d3bdf2d3a2a88ddb1c0c637967e1b2b9541a928) ) // "64 40056-01" 82S129 256x4 attribute + + ROM_REGION( 0x200, "line", 0 ) + ROM_LOAD( "abc80_22.k1", 0x0000, 0x0200, CRC(74de7a0b) SHA1(96f37b0ca65aa8af4242bad38124f410b7f657fe) ) // "64 40058-01" 82S131 512x4 chargen 74S263 row address + + ROM_REGION( 0x100, "mmu", 0 ) + ROM_LOAD( "abc80_13.e7", 0x0000, 0x0100, CRC(f7738834) SHA1(b02df3e678fb50c9cb75b4a97615222d3b4577a3) ) // "64 40057-01" 82S129 256x4 address decoder +ROM_END + + + +//************************************************************************** +// SYSTEM DRIVERS +//************************************************************************** + +// YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS +COMP( 1978, abc80, 0, 0, abc80, abc80, driver_device, 0, "Luxor Datorer AB", "ABC 80", GAME_SUPPORTS_SAVE | GAME_IMPERFECT_KEYBOARD ) |