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Diffstat (limited to 'src/mess/drivers/abc80.c')
-rw-r--r--src/mess/drivers/abc80.c864
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 )