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-rw-r--r--src/mame/drivers/sg1000.cpp916
1 files changed, 916 insertions, 0 deletions
diff --git a/src/mame/drivers/sg1000.cpp b/src/mame/drivers/sg1000.cpp
new file mode 100644
index 00000000000..607c56cf4b1
--- /dev/null
+++ b/src/mame/drivers/sg1000.cpp
@@ -0,0 +1,916 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/*
+
+Sega SG-1000
+
+PCB Layout
+----------
+
+171-5078 (C) SEGA 1983
+171-5046 REV. A (C) SEGA 1983
+
+|---------------------------| |----------------------------|
+| SW1 CN2 | |------|---------------| | SW2 CN4 |
+| |---| CN3 |---| |
+| CN1 CN5 |
+| |
+| 10.738635MHz |------------------------------| 7805 |
+| |---| |------------------------------| |
+| | | CN6 |
+| | 9 | |
+| | 9 | LS32 |
+| | 1 | |---------| |
+| | 8 | | TMM2009 | LS139 |
+| | A | |---------| |------------------| |
+| | | | Z80 | |
+| |---| |------------------| |
+| |
+| |
+| MB8118 MB8118 MB8118 MB8118 SN76489A SW3 |
+| MB8118 MB8118 MB8118 MB8118 LS257 LS257 |
+|---------------------------------------------------------------------------------------|
+
+Notes:
+ All IC's shown.
+
+ Z80 - NEC D780C-1 / Zilog Z8400A (REV.A) Z80A CPU @ 3.579545
+ TMS9918A- Texas Instruments TMS9918ANL Video Display Processor @ 10.738635MHz
+ MB8118 - Fujitsu MB8118-12 16K x 1 Dynamic RAM
+ TMM2009 - Toshiba TMM2009P-A / TMM2009P-B (REV.A)
+ SN76489A- Texas Instruments SN76489AN Digital Complex Sound Generator @ 3.579545
+ CN1 - player 1 joystick connector
+ CN2 - RF video connector
+ CN3 - keyboard connector
+ CN4 - power connector (+9VDC)
+ CN5 - player 2 joystick connector
+ CN6 - cartridge connector
+ SW1 - TV channel select switch
+ SW2 - power switch
+ SW3 - hold switch
+
+*/
+
+/*
+
+ TODO:
+
+ - SC-3000 return instruction referenced by R when reading ports 60-7f,e0-ff
+ - connect PSG /READY signal to Z80 WAIT
+ - accurate video timing
+ - SP-400 serial printer
+ - SH-400 racing controller
+ - SF-7000 serial comms
+
+*/
+
+
+#include "includes/sg1000.h"
+#include "bus/rs232/rs232.h"
+#include "softlist.h"
+
+
+/***************************************************************************
+ READ/WRITE HANDLERS
+***************************************************************************/
+
+// TODO: not sure if the OMV bios actually detects the presence of a cart,
+// or if the cart data simply overwrites the internal bios...
+// for the moment let assume the latter!
+READ8_MEMBER( sg1000_state::omv_r )
+{
+ if (m_cart && m_cart->exists())
+ return m_cart->read_cart(space, offset);
+ else
+ return m_rom->base()[offset];
+}
+
+WRITE8_MEMBER( sg1000_state::omv_w )
+{
+ if (m_cart && m_cart->exists())
+ m_cart->write_cart(space, offset, data);
+}
+
+/*-------------------------------------------------
+ joysel_r -
+-------------------------------------------------*/
+
+READ8_MEMBER( sg1000_state::joysel_r )
+{
+ return 0x80;
+}
+
+/*-------------------------------------------------
+ ADDRESS_MAP( sg1000_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( sg1000_map, AS_PROGRAM, 8, sg1000_state )
+ AM_RANGE(0x0000, 0xbfff) AM_DEVREADWRITE(CARTSLOT_TAG, sega8_cart_slot_device, read_cart, write_cart)
+ AM_RANGE(0xc000, 0xc3ff) AM_MIRROR(0x3c00) AM_RAM
+ADDRESS_MAP_END
+
+/*-------------------------------------------------
+ ADDRESS_MAP( sg1000_io_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( sg1000_io_map, AS_IO, 8, sg1000_state )
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x40, 0x40) AM_MIRROR(0x3f) AM_DEVWRITE(SN76489AN_TAG, sn76489a_device, write)
+ AM_RANGE(0x80, 0x80) AM_MIRROR(0x3e) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, vram_read, vram_write)
+ AM_RANGE(0x81, 0x81) AM_MIRROR(0x3e) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, register_read, register_write)
+ AM_RANGE(0xdc, 0xdc) AM_READ_PORT("PA7")
+ AM_RANGE(0xdd, 0xdd) AM_READ_PORT("PB7")
+ AM_RANGE(0xde, 0xde) AM_READ(joysel_r) AM_WRITENOP
+ AM_RANGE(0xdf, 0xdf) AM_NOP
+ADDRESS_MAP_END
+
+/*-------------------------------------------------
+ ADDRESS_MAP( omv_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( omv_map, AS_PROGRAM, 8, sg1000_state )
+ AM_RANGE(0x0000, 0xbfff) AM_READWRITE(omv_r, omv_w)
+ AM_RANGE(0xc000, 0xc7ff) AM_MIRROR(0x3800) AM_RAM
+ADDRESS_MAP_END
+
+/*-------------------------------------------------
+ ADDRESS_MAP( omv_io_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( omv_io_map, AS_IO, 8, sg1000_state )
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x40, 0x40) AM_MIRROR(0x3f) AM_DEVWRITE(SN76489AN_TAG, sn76489a_device, write)
+ AM_RANGE(0x80, 0x80) AM_MIRROR(0x3e) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, vram_read, vram_write)
+ AM_RANGE(0x81, 0x81) AM_MIRROR(0x3e) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, register_read, register_write)
+ AM_RANGE(0xc0, 0xc0) AM_MIRROR(0x38) AM_READ_PORT("C0")
+ AM_RANGE(0xc1, 0xc1) AM_MIRROR(0x38) AM_READ_PORT("C1")
+ AM_RANGE(0xc2, 0xc2) AM_MIRROR(0x38) AM_READ_PORT("C2")
+ AM_RANGE(0xc3, 0xc3) AM_MIRROR(0x38) AM_READ_PORT("C3")
+ AM_RANGE(0xc4, 0xc4) AM_MIRROR(0x3a) AM_READ_PORT("C4")
+ AM_RANGE(0xc5, 0xc5) AM_MIRROR(0x3a) AM_READ_PORT("C5")
+ADDRESS_MAP_END
+
+/*-------------------------------------------------
+ ADDRESS_MAP( sc3000_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( sc3000_map, AS_PROGRAM, 8, sg1000_state )
+ AM_RANGE(0x0000, 0xbfff) AM_DEVREADWRITE(CARTSLOT_TAG, sega8_cart_slot_device, read_cart, write_cart)
+ AM_RANGE(0xc000, 0xc7ff) AM_MIRROR(0x3800) AM_RAM
+ADDRESS_MAP_END
+
+/*-------------------------------------------------
+ ADDRESS_MAP( sc3000_io_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( sc3000_io_map, AS_IO, 8, sg1000_state )
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x7f, 0x7f) AM_DEVWRITE(SN76489AN_TAG, sn76489a_device, write)
+ AM_RANGE(0xbe, 0xbe) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, vram_read, vram_write)
+ AM_RANGE(0xbf, 0xbf) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, register_read, register_write)
+ AM_RANGE(0xdc, 0xdf) AM_DEVREADWRITE(UPD9255_TAG, i8255_device, read, write)
+ADDRESS_MAP_END
+
+/* This is how the I/O ports are really mapped, but MAME does not support overlapping ranges
+static ADDRESS_MAP_START( sc3000_io_map, AS_IO, 8, sg1000_state )
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x00, 0x00) AM_MIRROR(0xdf) AM_DEVREADWRITE(UPD9255_TAG, i8255_device, read, write)
+ AM_RANGE(0x00, 0x00) AM_MIRROR(0x7f) AM_DEVWRITE(SN76489AN_TAG, sn76489a_device, write)
+ AM_RANGE(0x00, 0x00) AM_MIRROR(0xae) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, vram_read, vram_write)
+ AM_RANGE(0x01, 0x01) AM_MIRROR(0xae) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, register_read, register_write)
+ AM_RANGE(0x60, 0x60) AM_MIRROR(0x9f) AM_READ(sc3000_r_r)
+ADDRESS_MAP_END
+*/
+
+/*-------------------------------------------------
+ ADDRESS_MAP( sf7000_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( sf7000_map, AS_PROGRAM, 8, sf7000_state )
+ AM_RANGE(0x0000, 0x3fff) AM_READ_BANK("bank1") AM_WRITE_BANK("bank2")
+ AM_RANGE(0x4000, 0xffff) AM_RAM
+ADDRESS_MAP_END
+
+/*-------------------------------------------------
+ ADDRESS_MAP( sf7000_io_map )
+-------------------------------------------------*/
+
+static ADDRESS_MAP_START( sf7000_io_map, AS_IO, 8, sf7000_state )
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x7f, 0x7f) AM_DEVWRITE(SN76489AN_TAG, sn76489a_device, write)
+ AM_RANGE(0xbe, 0xbe) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, vram_read, vram_write)
+ AM_RANGE(0xbf, 0xbf) AM_DEVREADWRITE(TMS9918A_TAG, tms9918a_device, register_read, register_write)
+ AM_RANGE(0xdc, 0xdf) AM_DEVREADWRITE(UPD9255_0_TAG, i8255_device, read, write)
+ AM_RANGE(0xe0, 0xe1) AM_DEVICE(UPD765_TAG, upd765a_device, map)
+ AM_RANGE(0xe4, 0xe7) AM_DEVREADWRITE(UPD9255_1_TAG, i8255_device, read, write)
+ AM_RANGE(0xe8, 0xe8) AM_DEVREADWRITE(UPD8251_TAG, i8251_device, data_r, data_w)
+ AM_RANGE(0xe9, 0xe9) AM_DEVREADWRITE(UPD8251_TAG, i8251_device, status_r, control_w)
+ADDRESS_MAP_END
+
+/***************************************************************************
+ INPUT PORTS
+***************************************************************************/
+
+/*-------------------------------------------------
+ INPUT_CHANGED_MEMBER( trigger_nmi )
+-------------------------------------------------*/
+
+INPUT_CHANGED_MEMBER( sg1000_state::trigger_nmi )
+{
+ m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
+/*-------------------------------------------------
+ INPUT_PORTS( sg1000 )
+-------------------------------------------------*/
+
+static INPUT_PORTS_START( sg1000 )
+ PORT_START("PA7")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
+
+ PORT_START("PB7")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
+ PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("NMI")
+ PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_START ) PORT_NAME("PAUSE") PORT_CODE(KEYCODE_P) PORT_CHANGED_MEMBER(DEVICE_SELF, sg1000_state, trigger_nmi, 0)
+INPUT_PORTS_END
+
+/*-------------------------------------------------
+ INPUT_PORTS( omv )
+-------------------------------------------------*/
+
+static INPUT_PORTS_START( omv )
+ PORT_START("C0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
+ PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("C1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("9 #") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("0 *") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+ PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("C2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
+ PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("C3")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_G) PORT_CHAR('G')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_CODE(KEYCODE_H) PORT_CHAR('H')
+ PORT_BIT( 0xfc, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("C4")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_NAME("S-1")
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_NAME("S-2")
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
+
+ PORT_START("C5")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
+ PORT_BIT( 0xf0, IP_ACTIVE_LOW, IPT_UNUSED )
+INPUT_PORTS_END
+
+/*-------------------------------------------------
+ INPUT_PORTS( sk1100 )
+-------------------------------------------------*/
+
+INPUT_PORTS_START( sk1100 )
+ PORT_START("PA0")
+ 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_Q) PORT_CHAR('Q') PORT_CHAR('q')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ENG DIER'S") PORT_CODE(KEYCODE_RALT) PORT_CHAR(UCHAR_MAMEKEY(RALT))
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i')
+
+ PORT_START("PA1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
+ 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_S) PORT_CHAR('S') PORT_CHAR('s')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SPC") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o')
+
+ PORT_START("PA2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("HOME CLR") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME))
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p')
+
+ PORT_START("PA3")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("INS DEL") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_SMALL_PI) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(0x03c0)
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@') PORT_CHAR('`')
+
+ PORT_START("PA4")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_DOWN) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(']') PORT_CHAR('}')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('[') PORT_CHAR('{')
+
+ PORT_START("PA5")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_LEFT) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CR") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PA6")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_RIGHT) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PA7")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
+
+ PORT_START("PB0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
+ PORT_BIT( 0x06, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PB1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
+ PORT_BIT( 0x06, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PB2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+ PORT_BIT( 0x06, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PB3")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
+ PORT_BIT( 0x06, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PB4")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('^')
+ PORT_BIT( 0x06, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("PB5")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\xc2\xa5") PORT_CODE(KEYCODE_TILDE) PORT_CHAR(0x00a5)
+ PORT_BIT( 0x06, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FUNC") PORT_CODE(KEYCODE_TAB)
+
+ PORT_START("PB6")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BREAK") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GRAPH") PORT_CODE(KEYCODE_LALT) PORT_CHAR(UCHAR_MAMEKEY(LALT))
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
+
+ PORT_START("PB7")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
+
+ PORT_START("NMI")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RESET") PORT_CODE(KEYCODE_F10) PORT_CHANGED_MEMBER(DEVICE_SELF, sg1000_state, trigger_nmi, 0)
+INPUT_PORTS_END
+
+/*-------------------------------------------------
+ INPUT_PORTS( sc3000 )
+-------------------------------------------------*/
+
+static INPUT_PORTS_START( sc3000 )
+ PORT_INCLUDE( sk1100 )
+INPUT_PORTS_END
+
+/*-------------------------------------------------
+ INPUT_PORTS( sf7000 )
+-------------------------------------------------*/
+
+static INPUT_PORTS_START( sf7000 )
+ PORT_INCLUDE( sk1100 )
+
+ PORT_START("BAUD")
+ PORT_CONFNAME( 0x07, 0x05, "Baud rate")
+ PORT_CONFSETTING( 0x00, "9600 baud" )
+ PORT_CONFSETTING( 0x01, "4800 baud" )
+ PORT_CONFSETTING( 0x02, "2400 baud" )
+ PORT_CONFSETTING( 0x03, "1200 baud" )
+ PORT_CONFSETTING( 0x04, "600 baud" )
+ PORT_CONFSETTING( 0x05, "300 baud" )
+INPUT_PORTS_END
+
+/***************************************************************************
+ DEVICE CONFIGURATION
+***************************************************************************/
+
+/*-------------------------------------------------
+ TMS9928a_interface tms9928a_interface
+-------------------------------------------------*/
+
+WRITE_LINE_MEMBER(sg1000_state::sg1000_vdp_interrupt)
+{
+ m_maincpu->set_input_line(INPUT_LINE_IRQ0, state);
+}
+
+/*-------------------------------------------------
+ I8255 INTERFACE
+-------------------------------------------------*/
+
+READ8_MEMBER( sc3000_state::ppi_pa_r )
+{
+ /*
+ Signal Description
+
+ PA0 Keyboard input
+ PA1 Keyboard input
+ PA2 Keyboard input
+ PA3 Keyboard input
+ PA4 Keyboard input
+ PA5 Keyboard input
+ PA6 Keyboard input
+ PA7 Keyboard input
+ */
+
+ return m_key_row[m_keylatch]->read();
+}
+
+READ8_MEMBER( sc3000_state::ppi_pb_r )
+{
+ /*
+ Signal Description
+
+ PB0 Keyboard input
+ PB1 Keyboard input
+ PB2 Keyboard input
+ PB3 Keyboard input
+ PB4 /CONT input from cartridge terminal B-11
+ PB5 FAULT input from printer
+ PB6 BUSY input from printer
+ PB7 Cassette tape input
+ */
+
+ /* keyboard */
+ UINT8 data = m_key_row[m_keylatch + 8]->read();
+
+ /* cartridge contact */
+ data |= 0x10;
+
+ /* printer */
+ data |= 0x60;
+
+ /* tape input */
+ if (m_cassette->input() > +0.0) data |= 0x80;
+
+ return data;
+}
+
+WRITE8_MEMBER( sc3000_state::ppi_pc_w )
+{
+ /*
+ Signal Description
+
+ PC0 Keyboard raster output
+ PC1 Keyboard raster output
+ PC2 Keyboard raster output
+ PC3 not connected
+ PC4 Cassette tape output
+ PC5 DATA to printer
+ PC6 /RESET to printer
+ PC7 /FEED to printer
+ */
+
+ /* keyboard */
+ m_keylatch = data & 0x07;
+
+ /* cassette */
+ m_cassette->output( BIT(data, 4) ? +1.0 : -1.0);
+
+ /* TODO printer */
+}
+
+/*-------------------------------------------------
+ I8255 INTERFACE
+-------------------------------------------------*/
+
+WRITE_LINE_MEMBER( sf7000_state::write_centronics_busy )
+{
+ m_centronics_busy = state;
+}
+
+READ8_MEMBER( sf7000_state::ppi_pa_r )
+{
+ /*
+ Signal Description
+
+ PA0 INT from FDC
+ PA1 BUSY from Centronics printer
+ PA2 INDEX from FDD
+ PA3
+ PA4
+ PA5
+ PA6
+ PA7
+ */
+
+ UINT8 data = 0;
+
+ data |= m_fdc->get_irq() ? 0x01 : 0x00;
+ data |= m_centronics_busy << 1;
+ data |= m_floppy0->idx_r() << 2;
+
+ return data;
+}
+
+WRITE8_MEMBER( sf7000_state::ppi_pc_w )
+{
+ /*
+ Signal Description
+
+ PC0 /INUSE signal to FDD
+ PC1 /MOTOR ON signal to FDD
+ PC2 TC signal to FDC
+ PC3 RESET signal to FDC
+ PC4 not connected
+ PC5 not connected
+ PC6 /ROM SEL (switch between IPL ROM and RAM)
+ PC7 /STROBE to Centronics printer
+ */
+
+ if (!BIT(data, 0))
+ m_fdc->set_floppy(m_floppy0);
+ else
+ m_fdc->set_floppy(NULL);
+
+ /* floppy motor */
+ m_floppy0->mon_w(BIT(data, 1));
+
+ /* FDC terminal count */
+ m_fdc->tc_w(BIT(data, 2));
+
+ /* FDC reset */
+ if (BIT(data, 3))
+ {
+ m_fdc->reset();
+ }
+
+ /* ROM selection */
+ membank("bank1")->set_entry(BIT(data, 6));
+
+ /* printer strobe */
+ m_centronics->write_strobe(BIT(data, 7));
+}
+
+/*-------------------------------------------------
+ upd765_interface sf7000_upd765_interface
+-------------------------------------------------*/
+
+FLOPPY_FORMATS_MEMBER( sf7000_state::floppy_formats )
+ FLOPPY_SF7000_FORMAT
+FLOPPY_FORMATS_END
+
+/*-------------------------------------------------
+ floppy_interface sf7000_floppy_interface
+-------------------------------------------------*/
+
+static SLOT_INTERFACE_START( sf7000_floppies )
+ SLOT_INTERFACE( "3ssdd", FLOPPY_3_SSDD )
+SLOT_INTERFACE_END
+
+/*-------------------------------------------------
+ MACHINE_START( sg1000 )
+-------------------------------------------------*/
+
+void sg1000_state::machine_start()
+{
+ if (m_cart->get_type() == SEGA8_DAHJEE_TYPEA || m_cart->get_type() == SEGA8_DAHJEE_TYPEB)
+ {
+ m_maincpu->space(AS_PROGRAM).install_read_handler(0xc000, 0xffff, 0, 0, read8_delegate(FUNC(sega8_cart_slot_device::read_ram),(sega8_cart_slot_device*)m_cart));
+ m_maincpu->space(AS_PROGRAM).install_write_handler(0xc000, 0xffff, 0, 0, write8_delegate(FUNC(sega8_cart_slot_device::write_ram),(sega8_cart_slot_device*)m_cart));
+ }
+
+ if (m_cart)
+ m_cart->save_ram();
+}
+
+/*-------------------------------------------------
+ MACHINE_START( sc3000 )
+-------------------------------------------------*/
+
+void sc3000_state::machine_start()
+{
+ /* toggle light gun crosshair */
+ timer_set(attotime::zero, TIMER_LIGHTGUN_TICK);
+
+ // find keyboard rows
+ m_key_row[0] = m_pa0;
+ m_key_row[1] = m_pa1;
+ m_key_row[2] = m_pa2;
+ m_key_row[3] = m_pa3;
+ m_key_row[4] = m_pa4;
+ m_key_row[5] = m_pa5;
+ m_key_row[6] = m_pa6;
+ m_key_row[7] = m_pa7;
+ m_key_row[8] = m_pb0;
+ m_key_row[9] = m_pb1;
+ m_key_row[10] = m_pb2;
+ m_key_row[11] = m_pb3;
+ m_key_row[12] = m_pb4;
+ m_key_row[13] = m_pb5;
+ m_key_row[14] = m_pb6;
+ m_key_row[15] = m_pb7;
+
+ /* register for state saving */
+ save_item(NAME(m_keylatch));
+
+ if (m_cart && m_cart->exists() && (m_cart->get_type() == SEGA8_BASIC_L3 || m_cart->get_type() == SEGA8_MUSIC_EDITOR
+ || m_cart->get_type() == SEGA8_DAHJEE_TYPEA || m_cart->get_type() == SEGA8_DAHJEE_TYPEB))
+ {
+ m_maincpu->space(AS_PROGRAM).install_read_handler(0xc000, 0xffff, 0, 0, read8_delegate(FUNC(sega8_cart_slot_device::read_ram),(sega8_cart_slot_device*)m_cart));
+ m_maincpu->space(AS_PROGRAM).install_write_handler(0xc000, 0xffff, 0, 0, write8_delegate(FUNC(sega8_cart_slot_device::write_ram),(sega8_cart_slot_device*)m_cart));
+ }
+
+ if (m_cart)
+ m_cart->save_ram();
+}
+
+
+/*-------------------------------------------------
+ MACHINE_START( sf7000 )
+-------------------------------------------------*/
+
+void sf7000_state::machine_start()
+{
+ sc3000_state::machine_start();
+
+ save_item(NAME(m_centronics_busy));
+
+ /* configure memory banking */
+ membank("bank1")->configure_entry(0, m_rom->base());
+ membank("bank1")->configure_entry(1, m_ram->pointer());
+ membank("bank2")->configure_entry(0, m_ram->pointer());
+}
+
+void sf7000_state::machine_reset()
+{
+ membank("bank1")->set_entry(0);
+ membank("bank2")->set_entry(0);
+}
+
+/***************************************************************************
+ MACHINE DRIVERS
+***************************************************************************/
+
+/*-------------------------------------------------
+ MACHINE_CONFIG_START( sg1000, sg1000_state )
+-------------------------------------------------*/
+
+static MACHINE_CONFIG_START( sg1000, sg1000_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_10_738635MHz/3)
+ MCFG_CPU_PROGRAM_MAP(sg1000_map)
+ MCFG_CPU_IO_MAP(sg1000_io_map)
+
+ /* video hardware */
+ MCFG_DEVICE_ADD( TMS9918A_TAG, TMS9918A, XTAL_10_738635MHz / 2 )
+ MCFG_TMS9928A_VRAM_SIZE(0x4000)
+ MCFG_TMS9928A_OUT_INT_LINE_CB(WRITELINE(sg1000_state, sg1000_vdp_interrupt))
+ MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG )
+ MCFG_SCREEN_UPDATE_DEVICE( TMS9918A_TAG, tms9918a_device, screen_update )
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD(SN76489AN_TAG, SN76489A, XTAL_10_738635MHz/3)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
+
+ /* cartridge */
+ MCFG_SG1000_CARTRIDGE_ADD(CARTSLOT_TAG, sg1000_cart, NULL)
+
+ /* software lists */
+ MCFG_SOFTWARE_LIST_ADD("cart_list","sg1000")
+
+ /* internal ram */
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("1K")
+MACHINE_CONFIG_END
+
+/*-------------------------------------------------
+ MACHINE_CONFIG_DERIVED( omv, sg1000 )
+-------------------------------------------------*/
+
+static MACHINE_CONFIG_DERIVED( omv, sg1000 )
+ MCFG_CPU_MODIFY(Z80_TAG)
+ MCFG_CPU_PROGRAM_MAP(omv_map)
+ MCFG_CPU_IO_MAP(omv_io_map)
+
+ MCFG_DEVICE_REMOVE(CARTSLOT_TAG)
+ MCFG_OMV_CARTRIDGE_ADD(CARTSLOT_TAG, sg1000_cart, NULL)
+
+ MCFG_RAM_MODIFY(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("2K")
+MACHINE_CONFIG_END
+
+/*-------------------------------------------------
+ MACHINE_CONFIG_START( sc3000, sc3000_state )
+-------------------------------------------------*/
+
+static MACHINE_CONFIG_START( sc3000, sc3000_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_10_738635MHz/3) // LH0080A
+ MCFG_CPU_PROGRAM_MAP(sc3000_map)
+ MCFG_CPU_IO_MAP(sc3000_io_map)
+
+ /* video hardware */
+ MCFG_DEVICE_ADD( TMS9918A_TAG, TMS9918A, XTAL_10_738635MHz / 2 )
+ MCFG_TMS9928A_VRAM_SIZE(0x4000)
+ MCFG_TMS9928A_OUT_INT_LINE_CB(WRITELINE(sg1000_state, sg1000_vdp_interrupt))
+ MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG )
+ MCFG_SCREEN_UPDATE_DEVICE( TMS9918A_TAG, tms9918a_device, screen_update )
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD(SN76489AN_TAG, SN76489A, XTAL_10_738635MHz/3)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
+
+ /* devices */
+ MCFG_DEVICE_ADD(UPD9255_TAG, I8255, 0)
+ MCFG_I8255_IN_PORTA_CB(READ8(sc3000_state, ppi_pa_r))
+ MCFG_I8255_IN_PORTB_CB(READ8(sc3000_state, ppi_pb_r))
+ MCFG_I8255_OUT_PORTC_CB(WRITE8(sc3000_state, ppi_pc_w))
+
+// MCFG_PRINTER_ADD("sp400") /* serial printer */
+
+ MCFG_CASSETTE_ADD("cassette")
+ MCFG_CASSETTE_FORMATS(sc3000_cassette_formats)
+ MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED)
+ MCFG_CASSETTE_INTERFACE("sc3000_cass")
+
+ /* cartridge */
+ MCFG_SC3000_CARTRIDGE_ADD(CARTSLOT_TAG, sg1000_cart, NULL)
+
+ /* software lists */
+ MCFG_SOFTWARE_LIST_ADD("cart_list","sg1000")
+ MCFG_SOFTWARE_LIST_ADD("sc3k_cart_list","sc3000_cart")
+ MCFG_SOFTWARE_LIST_ADD("cass_list","sc3000_cass")
+
+ /* internal ram */
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("2K")
+MACHINE_CONFIG_END
+
+/*-------------------------------------------------
+ MACHINE_CONFIG_START( sf7000, sf7000_state )
+-------------------------------------------------*/
+
+static MACHINE_CONFIG_START( sf7000, sf7000_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_10_738635MHz/3)
+ MCFG_CPU_PROGRAM_MAP(sf7000_map)
+ MCFG_CPU_IO_MAP(sf7000_io_map)
+
+ /* video hardware */
+ MCFG_DEVICE_ADD( TMS9918A_TAG, TMS9918A, XTAL_10_738635MHz / 2 )
+ MCFG_TMS9928A_VRAM_SIZE(0x4000)
+ MCFG_TMS9928A_OUT_INT_LINE_CB(WRITELINE(sg1000_state, sg1000_vdp_interrupt))
+ MCFG_TMS9928A_SCREEN_ADD_NTSC( SCREEN_TAG )
+ MCFG_SCREEN_UPDATE_DEVICE( TMS9918A_TAG, tms9918a_device, screen_update )
+
+ /* sound hardware */
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+
+ MCFG_SOUND_ADD(SN76489AN_TAG, SN76489A, XTAL_10_738635MHz/3)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
+
+ /* devices */
+ MCFG_DEVICE_ADD(UPD9255_0_TAG, I8255, 0)
+ MCFG_I8255_IN_PORTA_CB(READ8(sc3000_state, ppi_pa_r))
+ MCFG_I8255_IN_PORTB_CB(READ8(sc3000_state, ppi_pb_r))
+ MCFG_I8255_OUT_PORTC_CB(WRITE8(sc3000_state, ppi_pc_w))
+
+ MCFG_DEVICE_ADD(UPD9255_1_TAG, I8255, 0)
+ MCFG_I8255_IN_PORTA_CB(READ8(sf7000_state, ppi_pa_r))
+ MCFG_I8255_OUT_PORTB_CB(DEVWRITE8("cent_data_out", output_latch_device, write))
+ MCFG_I8255_OUT_PORTC_CB(WRITE8(sf7000_state, ppi_pc_w))
+
+ MCFG_DEVICE_ADD(UPD8251_TAG, I8251, 0)
+ MCFG_I8251_TXD_HANDLER(DEVWRITELINE(RS232_TAG, rs232_port_device, write_txd))
+ MCFG_I8251_DTR_HANDLER(DEVWRITELINE(RS232_TAG, rs232_port_device, write_dtr))
+ MCFG_I8251_RTS_HANDLER(DEVWRITELINE(RS232_TAG, rs232_port_device, write_rts))
+
+ MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, NULL)
+ MCFG_RS232_RXD_HANDLER(DEVWRITELINE(UPD8251_TAG, i8251_device, write_rxd))
+ MCFG_RS232_DSR_HANDLER(DEVWRITELINE(UPD8251_TAG, i8251_device, write_dsr))
+
+ MCFG_UPD765A_ADD(UPD765_TAG, false, false)
+ MCFG_FLOPPY_DRIVE_ADD(UPD765_TAG ":0", sf7000_floppies, "3ssdd", sf7000_state::floppy_formats)
+
+ MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_devices, "printer")
+
+ MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics")
+
+ MCFG_CASSETTE_ADD("cassette")
+ MCFG_CASSETTE_FORMATS(sc3000_cassette_formats)
+ MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED)
+ MCFG_CASSETTE_INTERFACE("sc3000_cass")
+
+ /* software lists */
+ MCFG_SOFTWARE_LIST_ADD("flop_list","sf7000")
+
+ /* internal ram */
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("64K")
+MACHINE_CONFIG_END
+
+/***************************************************************************
+ ROMS
+***************************************************************************/
+
+ROM_START( sg1000 )
+ ROM_REGION( 0x10000, Z80_TAG, ROMREGION_ERASE00 )
+ROM_END
+
+#define rom_sg1000m2 rom_sg1000
+
+#define rom_sc3000 rom_sg1000
+
+#define rom_sc3000h rom_sg1000
+
+ROM_START( sf7000 )
+ ROM_REGION( 0x10000, Z80_TAG, ROMREGION_ERASE00 )
+ ROM_LOAD( "ipl.rom", 0x0000, 0x2000, CRC(d76810b8) SHA1(77339a6db2593aadc638bed77b8e9bed5d9d87e3) )
+ROM_END
+
+ROM_START( omv1000 )
+ ROM_REGION( 0x10000, Z80_TAG, ROMREGION_ERASE00 )
+ ROM_LOAD( "omvbios.bin", 0x0000, 0x4000, BAD_DUMP CRC(c5a67b95) SHA1(6d7c64dd60dee4a33061d3d3a7c2ed190d895cdb) ) // The BIOS comes from a Multivision FG-2000. It is still unknown if the FG-1000 BIOS differs
+ROM_END
+
+ROM_START( omv2000 )
+ ROM_REGION( 0x10000, Z80_TAG, ROMREGION_ERASE00 )
+ ROM_LOAD( "omvbios.bin", 0x0000, 0x4000, CRC(c5a67b95) SHA1(6d7c64dd60dee4a33061d3d3a7c2ed190d895cdb) )
+ROM_END
+
+/***************************************************************************
+ SYSTEM DRIVERS
+***************************************************************************/
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+CONS( 1983, sg1000, 0, 0, sg1000, sg1000, driver_device, 0, "Sega", "SG-1000", MACHINE_SUPPORTS_SAVE )
+CONS( 1984, sg1000m2, sg1000, 0, sc3000, sc3000, driver_device, 0, "Sega", "SG-1000 II", MACHINE_SUPPORTS_SAVE )
+COMP( 1983, sc3000, 0, sg1000, sc3000, sc3000, driver_device, 0, "Sega", "SC-3000", MACHINE_SUPPORTS_SAVE )
+COMP( 1983, sc3000h, sc3000, 0, sc3000, sc3000, driver_device, 0, "Sega", "SC-3000H", MACHINE_SUPPORTS_SAVE )
+COMP( 1983, sf7000, sc3000, 0, sf7000, sf7000, driver_device, 0, "Sega", "SC-3000/Super Control Station SF-7000", MACHINE_SUPPORTS_SAVE )
+CONS( 1984, omv1000, sg1000, 0, omv, omv, driver_device, 0, "Tsukuda Original", "Othello Multivision FG-1000", MACHINE_SUPPORTS_SAVE )
+CONS( 1984, omv2000, sg1000, 0, omv, omv, driver_device, 0, "Tsukuda Original", "Othello Multivision FG-2000", MACHINE_SUPPORTS_SAVE )