// license:BSD-3-Clause // copyright-holders:Curt Coder /* Osborne 4 Vixen Main PCB Layout --------------- TODO Notes: Relevant IC's shown. CPU - Zilog Z8400APS Z80A CPU FDC - SMC FDC1797 8155 - Intel P8155H ROM0 - ROM1,2 - AMD AM2732-1DC 4Kx8 EPROM CN1 - keyboard connector CN2 - CN3 - CN4 - floppy connector CN5 - power connector CN6 - composite video connector SW1 - reset switch SW2 - I/O PCB Layout -------------- TODO Notes: Relevant IC's shown. 8155 - Intel P8155H 8251 - AMD P8251A CN1 - IEEE488 connector CN2 - RS232 connector CN3 - */ /* TODO: - video line buffer - floppy - keyboard - RS232 RI interrupt - PCB layouts */ #include "includes/vixen.h" //************************************************************************** // INTERRUPTS //************************************************************************** //------------------------------------------------- // update_interrupt - //------------------------------------------------- void vixen_state::update_interrupt() { int state = (m_cmd_d1 && m_fdint) || m_vsync;// || (!m_enb_srq_int && !m_srq) || (!m_enb_atn_int && !m_atn) || (!m_enb_xmt_int && m_txrdy) || (!m_enb_rcv_int && m_rxrdy); m_maincpu->set_input_line(INPUT_LINE_IRQ0, state ? ASSERT_LINE : CLEAR_LINE); } //------------------------------------------------- // ctl_w - command write //------------------------------------------------- WRITE8_MEMBER( vixen_state::ctl_w ) { logerror("CTL %u\n", data); membank("bank3")->set_entry(BIT(data, 0)); } //------------------------------------------------- // status_r - status read //------------------------------------------------- READ8_MEMBER( vixen_state::status_r ) { /* bit description 0 VSYNC enable 1 FDINT enable 2 VSYNC 3 1 4 1 5 1 6 1 7 1 */ UINT8 data = 0xf8; // vertical sync interrupt enable data |= m_cmd_d0; // floppy interrupt enable data |= m_cmd_d1 << 1; // vertical sync data |= m_vsync << 2; return data; } //------------------------------------------------- // cmd_w - command write //------------------------------------------------- WRITE8_MEMBER( vixen_state::cmd_w ) { /* bit description 0 VSYNC enable 1 FDINT enable 2 3 4 5 6 7 */ // logerror("CMD %u\n", data); // vertical sync interrupt enable m_cmd_d0 = BIT(data, 0); if (!m_cmd_d0) { // clear vertical sync m_vsync = 0; } // floppy interrupt enable m_cmd_d1 = BIT(data, 1); update_interrupt(); } //------------------------------------------------- // ieee488_r - IEEE488 bus read //------------------------------------------------- READ8_MEMBER( vixen_state::ieee488_r ) { /* bit description 0 ATN 1 DAV 2 NDAC 3 NRFD 4 EOI 5 SRQ 6 IFC 7 REN */ UINT8 data = 0; /* attention */ data |= m_ieee488->atn_r(); /* data valid */ data |= m_ieee488->dav_r() << 1; /* data not accepted */ data |= m_ieee488->ndac_r() << 2; /* not ready for data */ data |= m_ieee488->nrfd_r() << 3; /* end or identify */ data |= m_ieee488->eoi_r() << 4; /* service request */ data |= m_ieee488->srq_r() << 5; /* interface clear */ data |= m_ieee488->ifc_r() << 6; /* remote enable */ data |= m_ieee488->ren_r() << 7; return data; } //------------------------------------------------- // port3_r - serial status read //------------------------------------------------- READ8_MEMBER( vixen_state::port3_r ) { /* bit description 0 RI 1 DCD 2 1 3 1 4 1 5 1 6 1 7 1 */ UINT8 data = 0xfc; // ring indicator data |= m_rs232->ri_r(); // data carrier detect data |= m_rs232->dcd_r() << 1; return data; } //************************************************************************** // ADDRESS MAPS //************************************************************************** //------------------------------------------------- // ADDRESS_MAP( vixen_mem ) //------------------------------------------------- static ADDRESS_MAP_START( vixen_mem, AS_PROGRAM, 8, vixen_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xefff) AM_READ_BANK("bank1") AM_WRITE_BANK("bank2") AM_RANGE(0xf000, 0xffff) AM_READ_BANK("bank3") AM_WRITE_BANK("bank4") AM_SHARE("video_ram") ADDRESS_MAP_END //------------------------------------------------- // ADDRESS_MAP( vixen_io ) //------------------------------------------------- static ADDRESS_MAP_START( vixen_io, AS_IO, 8, vixen_state ) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x03) AM_DEVREADWRITE(FDC1797_TAG, fd1797_t, read, write) AM_RANGE(0x04, 0x04) AM_MIRROR(0x03) AM_READWRITE(status_r, cmd_w) AM_RANGE(0x08, 0x08) AM_MIRROR(0x01) AM_DEVREADWRITE(P8155H_TAG, i8155_device, read, write) AM_RANGE(0x0c, 0x0d) AM_DEVWRITE(P8155H_TAG, i8155_device, ale_w) AM_RANGE(0x10, 0x10) AM_MIRROR(0x07) AM_DEVREAD(IEEE488_TAG, ieee488_device, dio_r) AM_RANGE(0x18, 0x18) AM_MIRROR(0x07) AM_READ(ieee488_r) AM_RANGE(0x20, 0x21) AM_MIRROR(0x04) AM_DEVWRITE(P8155H_IO_TAG, i8155_device, ale_w) AM_RANGE(0x28, 0x28) AM_MIRROR(0x05) AM_DEVREADWRITE(P8155H_IO_TAG, i8155_device, read, write) AM_RANGE(0x30, 0x30) AM_MIRROR(0x06) AM_DEVREADWRITE(P8251A_TAG, i8251_device, data_r, data_w) AM_RANGE(0x31, 0x31) AM_MIRROR(0x06) AM_DEVREADWRITE(P8251A_TAG, i8251_device, status_r, control_w) AM_RANGE(0x38, 0x38) AM_MIRROR(0x07) AM_READ(port3_r) // AM_RANGE(0xf0, 0xff) Hard Disk? ADDRESS_MAP_END //************************************************************************** // INPUT PORTS //************************************************************************** //------------------------------------------------- // INPUT_PORTS( vixen ) //------------------------------------------------- INPUT_PORTS_START( vixen ) PORT_START("Y0") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y3") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y4") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y5") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y6") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_START("Y7") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) INPUT_PORTS_END //************************************************************************** // VIDEO //************************************************************************** //------------------------------------------------- // TIMER_DEVICE_CALLBACK_MEMBER( vsync_tick ) //------------------------------------------------- TIMER_DEVICE_CALLBACK_MEMBER(vixen_state::vsync_tick) { if (m_cmd_d0) { m_vsync = 1; update_interrupt(); } } void vixen_state::video_start() { // register for state saving save_item(NAME(m_alt)); save_item(NAME(m_256)); save_item(NAME(m_vsync)); } //------------------------------------------------- // SCREEN_UPDATE( vixen ) //------------------------------------------------- UINT32 vixen_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { const pen_t *pen = m_palette->pens(); for (int txadr = 0; txadr < 26; txadr++) { for (int scan = 0; scan < 10; scan++) { for (int chadr = 0; chadr < 128; chadr++) { UINT16 sync_addr = (txadr << 7) | chadr; UINT8 sync_data = m_sync_rom->base()[sync_addr]; int blank = BIT(sync_data, 4); /* int clrchadr = BIT(sync_data, 7); int hsync = BIT(sync_data, 6); int clrtxadr = BIT(sync_data, 5); int vsync = BIT(sync_data, 3); int comp_sync = BIT(sync_data, 2); logerror("SYNC %03x:%02x TXADR %u SCAN %u CHADR %u : COMPSYNC %u VSYNC %u BLANK %u CLRTXADR %u HSYNC %u CLRCHADR %u\n", sync_addr,sync_data,txadr,scan,chadr,comp_sync,vsync,blank,clrtxadr,hsync,clrchadr); */ int reverse = 0; UINT16 video_addr = (txadr << 7) | chadr; UINT8 video_data = m_video_ram[video_addr]; UINT16 char_addr = 0; if (m_256) { char_addr = (BIT(video_data, 7) << 11) | (scan << 7) | (video_data & 0x7f); reverse = m_alt; } else { char_addr = (scan << 7) | (video_data & 0x7f); reverse = BIT(video_data, 7); } UINT8 char_data = m_char_rom->base()[char_addr]; for (int x = 0; x < 8; x++) { int color = (BIT(char_data, 7 - x) ^ reverse) & !blank; bitmap.pix32((txadr * 10) + scan, (chadr * 8) + x) = pen[color]; } } } } return 0; } //************************************************************************** // SOUND //************************************************************************** //------------------------------------------------- // DISCRETE_SOUND( vixen ) //------------------------------------------------- static DISCRETE_SOUND_START( vixen ) DISCRETE_INPUT_LOGIC(NODE_01) DISCRETE_SQUAREWAVE(NODE_02, NODE_01, XTAL_23_9616MHz/15360, 100, 50, 0, 90) DISCRETE_OUTPUT(NODE_02, 2000) DISCRETE_SOUND_END //************************************************************************** // DEVICE CONFIGURATION //************************************************************************** //------------------------------------------------- // I8155 interface //------------------------------------------------- READ8_MEMBER( vixen_state::i8155_pa_r ) { UINT8 data = 0xff; if (!BIT(m_col, 0)) data &= m_y0->read(); if (!BIT(m_col, 1)) data &= m_y1->read(); if (!BIT(m_col, 2)) data &= m_y2->read(); if (!BIT(m_col, 3)) data &= m_y3->read(); if (!BIT(m_col, 4)) data &= m_y4->read(); if (!BIT(m_col, 5)) data &= m_y5->read(); if (!BIT(m_col, 6)) data &= m_y6->read(); if (!BIT(m_col, 7)) data &= m_y7->read(); return data; } WRITE8_MEMBER( vixen_state::i8155_pb_w ) { m_col = data; } WRITE8_MEMBER( vixen_state::i8155_pc_w ) { /* bit description 0 DSEL1/ 1 DSEL2/ 2 DDEN/ 3 ALT CHARSET/ 4 256 CHARS 5 BEEP ENB 6 7 */ // drive select floppy_image_device *floppy = NULL; if (!BIT(data, 0)) floppy = m_floppy0->get_device(); if (!BIT(data, 1)) floppy = m_floppy1->get_device(); m_fdc->set_floppy(floppy); if (floppy) floppy->mon_w(0); // density select m_fdc->dden_w(BIT(data, 2)); // charset m_alt = BIT(data, 3); m_256 = BIT(data, 4); // beep enable m_discrete->write(space, NODE_01, BIT(data, 5)); } //------------------------------------------------- // I8155 IO interface //------------------------------------------------- WRITE8_MEMBER( vixen_state::io_i8155_pb_w ) { /* bit description PB0 ATN PB1 DAV PB2 NDAC PB3 NRFD PB4 EOI PB5 SRQ PB6 IFC PB7 REN */ /* data valid */ m_ieee488->atn_w(BIT(data, 0)); /* end or identify */ m_ieee488->dav_w(BIT(data, 1)); /* remote enable */ m_ieee488->ndac_w(BIT(data, 2)); /* attention */ m_ieee488->nrfd_w(BIT(data, 3)); /* interface clear */ m_ieee488->eoi_w(BIT(data, 4)); /* service request */ m_ieee488->srq_w(BIT(data, 5)); /* not ready for data */ m_ieee488->ifc_w(BIT(data, 6)); /* data not accepted */ m_ieee488->ren_w(BIT(data, 7)); } WRITE8_MEMBER( vixen_state::io_i8155_pc_w ) { /* bit description PC0 select internal clock PC1 ENB RING INT PC2 ENB RCV INT PC3 ENB XMT INT PC4 ENB ATN INT PC5 ENB SRQ INT PC6 PC7 */ m_int_clk = BIT(data, 0); m_enb_ring_int = BIT(data, 1); m_enb_rcv_int = BIT(data, 2); m_enb_xmt_int = BIT(data, 3); m_enb_atn_int = BIT(data, 4); m_enb_srq_int = BIT(data, 5); } WRITE_LINE_MEMBER( vixen_state::io_i8155_to_w ) { if (m_int_clk) { m_usart->write_txc(state); m_usart->write_rxc(state); } } //------------------------------------------------- // i8251_interface usart_intf //------------------------------------------------- WRITE_LINE_MEMBER( vixen_state::rxrdy_w ) { m_rxrdy = state; update_interrupt(); } WRITE_LINE_MEMBER( vixen_state::txrdy_w ) { m_txrdy = state; update_interrupt(); } //------------------------------------------------- // IEEE488_INTERFACE( ieee488_intf ) //------------------------------------------------- WRITE_LINE_MEMBER( vixen_state::srq_w ) { m_srq = state; update_interrupt(); } WRITE_LINE_MEMBER( vixen_state::atn_w ) { m_atn = state; update_interrupt(); } static SLOT_INTERFACE_START( vixen_floppies ) SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) SLOT_INTERFACE_END WRITE_LINE_MEMBER( vixen_state::fdc_intrq_w ) { m_fdint = state; update_interrupt(); } //************************************************************************** // MACHINE INITIALIZATION //************************************************************************** //------------------------------------------------- // IRQ_CALLBACK_MEMBER( vixen_int_ack ) //------------------------------------------------- IRQ_CALLBACK_MEMBER(vixen_state::vixen_int_ack) { // D0 is pulled low return 0xfe; } //------------------------------------------------- // MACHINE_START( vixen ) //------------------------------------------------- void vixen_state::machine_start() { // configure memory banking UINT8 *ram = m_ram->pointer(); membank("bank1")->configure_entry(0, ram); membank("bank1")->configure_entry(1, m_rom->base()); membank("bank2")->configure_entry(0, ram); membank("bank2")->configure_entry(1, m_video_ram); membank("bank3")->configure_entry(0, m_video_ram); membank("bank3")->configure_entry(1, m_rom->base()); membank("bank4")->configure_entry(0, m_video_ram); // register for state saving save_item(NAME(m_reset)); save_item(NAME(m_col)); save_item(NAME(m_cmd_d0)); save_item(NAME(m_cmd_d1)); save_item(NAME(m_fdint)); } void vixen_state::machine_reset() { address_space &program = m_maincpu->space(AS_PROGRAM); program.install_read_bank(0x0000, 0xefff, 0xfff, 0, "bank1"); program.install_write_bank(0x0000, 0xefff, 0xfff, 0, "bank2"); membank("bank1")->set_entry(1); membank("bank2")->set_entry(1); membank("bank3")->set_entry(1); m_reset = 1; m_vsync = 0; m_cmd_d0 = 0; m_cmd_d1 = 0; update_interrupt(); m_fdc->reset(); m_io_i8155->reset(); m_usart->reset(); } //************************************************************************** // MACHINE CONFIGURATION //************************************************************************** //------------------------------------------------- // MACHINE_CONFIG( vixen ) //------------------------------------------------- static MACHINE_CONFIG_START( vixen, vixen_state ) // basic machine hardware MCFG_CPU_ADD(Z8400A_TAG, Z80, XTAL_23_9616MHz/6) MCFG_CPU_PROGRAM_MAP(vixen_mem) MCFG_CPU_IO_MAP(vixen_io) MCFG_CPU_IRQ_ACKNOWLEDGE_DRIVER(vixen_state,vixen_int_ack) // video hardware MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) MCFG_SCREEN_UPDATE_DRIVER(vixen_state, screen_update) MCFG_SCREEN_RAW_PARAMS(XTAL_23_9616MHz/2, 96*8, 0*8, 81*8, 27*10, 0*10, 26*10) MCFG_TIMER_DRIVER_ADD_SCANLINE("vsync", vixen_state, vsync_tick, SCREEN_TAG, 26*10, 27*10) MCFG_PALETTE_ADD_MONOCHROME_AMBER("palette") // sound hardware MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD(DISCRETE_TAG, DISCRETE, 0) MCFG_SOUND_CONFIG_DISCRETE(vixen) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.20) // devices MCFG_DEVICE_ADD(P8155H_TAG, I8155, XTAL_23_9616MHz/6) MCFG_I8155_IN_PORTA_CB(READ8(vixen_state, i8155_pa_r)) MCFG_I8155_OUT_PORTB_CB(WRITE8(vixen_state, i8155_pb_w)) MCFG_I8155_OUT_PORTC_CB(WRITE8(vixen_state, i8155_pc_w)) MCFG_DEVICE_ADD(P8155H_IO_TAG, I8155, XTAL_23_9616MHz/6) MCFG_I8155_OUT_PORTA_CB(DEVWRITE8(IEEE488_TAG, ieee488_device, dio_w)) MCFG_I8155_OUT_PORTB_CB(WRITE8(vixen_state, io_i8155_pb_w)) MCFG_I8155_OUT_PORTC_CB(WRITE8(vixen_state, io_i8155_pc_w)) MCFG_I8155_OUT_TIMEROUT_CB(WRITELINE(vixen_state, io_i8155_to_w)) MCFG_DEVICE_ADD(P8251A_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_I8251_RXRDY_HANDLER(WRITELINE(vixen_state, rxrdy_w)) MCFG_I8251_TXRDY_HANDLER(WRITELINE(vixen_state, txrdy_w)) MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE(P8251A_TAG, i8251_device, write_rxd)) MCFG_RS232_DSR_HANDLER(DEVWRITELINE(P8251A_TAG, i8251_device, write_dsr)) MCFG_FD1797x_ADD(FDC1797_TAG, XTAL_23_9616MHz/24) MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(vixen_state, fdc_intrq_w)) MCFG_FLOPPY_DRIVE_ADD(FDC1797_TAG":0", vixen_floppies, "525dd", floppy_image_device::default_floppy_formats) MCFG_FLOPPY_DRIVE_ADD(FDC1797_TAG":1", vixen_floppies, "525dd", floppy_image_device::default_floppy_formats) MCFG_IEEE488_BUS_ADD() MCFG_IEEE488_SRQ_CALLBACK(WRITELINE(vixen_state, srq_w)) MCFG_IEEE488_ATN_CALLBACK(WRITELINE(vixen_state, atn_w)) /* software lists */ MCFG_SOFTWARE_LIST_ADD("disk_list", "vixen") // internal ram MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("64K") MACHINE_CONFIG_END //************************************************************************** // ROMS //************************************************************************** //------------------------------------------------- // ROM( vixen ) //------------------------------------------------- ROM_START( vixen ) ROM_REGION( 0x1000, Z8400A_TAG, 0 ) ROM_LOAD( "osborne 4 mon rom v1.04 3p40082-03 a0a9.4c", 0x0000, 0x1000, CRC(5f1038ce) SHA1(e6809fac23650bbb4689e58edc768d917d80a2df) ) // OSBORNE 4 MON ROM / V1.04 3P40082-03 / A0A9 (c) OCC 1985 ROM_REGION( 0x1000, "video", 0 ) ROM_LOAD( "v1.10.3j", 0x0000, 0x1000, CRC(1f93e2d7) SHA1(0c479bfd3ac8d9959c285c020d0096930a9c6867) ) ROM_REGION( 0x1000, "chargen", 0 ) ROM_LOAD( "v1.00 l.1j", 0x0000, 0x1000, CRC(f97c50d9) SHA1(39f73afad68508c4b8a4d241c064f9978098d8f2) ) ROM_END //************************************************************************** // DRIVER INITIALIZATION //************************************************************************** //------------------------------------------------- // DRIVER_INIT( vixen ) //------------------------------------------------- DIRECT_UPDATE_MEMBER(vixen_state::vixen_direct_update_handler) { if (address >= 0xf000) { if (m_reset) { address_space &program = m_maincpu->space(AS_PROGRAM); program.install_read_bank(0x0000, 0xefff, "bank1"); program.install_write_bank(0x0000, 0xefff, "bank2"); membank("bank1")->set_entry(0); membank("bank2")->set_entry(0); m_reset = 0; } direct.explicit_configure(0xf000, 0xffff, 0xfff, m_rom->base()); return ~0; } return address; } DRIVER_INIT_MEMBER(vixen_state,vixen) { m_maincpu->space(AS_PROGRAM).set_direct_update_handler(direct_update_delegate(FUNC(vixen_state::vixen_direct_update_handler), this)); } //************************************************************************** // SYSTEM DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS COMP( 1984, vixen, 0, 0, vixen, vixen, vixen_state, vixen, "Osborne", "Vixen", GAME_NOT_WORKING )