diff options
Diffstat (limited to 'src/mame/drivers/xerox820.cpp')
-rw-r--r-- | src/mame/drivers/xerox820.cpp | 833 |
1 files changed, 833 insertions, 0 deletions
diff --git a/src/mame/drivers/xerox820.cpp b/src/mame/drivers/xerox820.cpp new file mode 100644 index 00000000000..172d1d2cd3a --- /dev/null +++ b/src/mame/drivers/xerox820.cpp @@ -0,0 +1,833 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/*************************************************************************** + + Xerox 820 + + 12/05/2009 Skeleton driver. + +****************************************************************************/ + +/* + + TODO: + + - Xerox 820 + - floppy format has 3xcd at the end of track data + :u109: write track 0 + :u109: track description 16xff ... 109xff 3xcd + - Xerox 820-II + - floppy (read/write to FDC triggers Z80 WAIT) + - Winchester + - Shugart SA1004 (chs=256,4,40 ss=256) + - Shugart SA606 (chs=160,6, ss=256) + - Shugart SA1403D controller + - Xerox 16/8 + - Emerald Microware X120 board + - type in Monitor v1.0 from manual + - ASCII keyboard + - low-profile keyboard + + http://users.telenet.be/lust/Xerox820/index.htm + http://www.classiccmp.org/dunfield/img41867/system.htm + http://www.microcodeconsulting.com/z80/plus2.htm + + Note: + - MK-82 have same roms as original Big Board + - MK-83 have 256K of RAM + + 8-inch formats + 77 tracks, 1 head, 26 sectors, 128 bytes sector length, first sector id 1 + 77 tracks, 1 head, 26 sectors, 256 bytes sector length, first sector id 1 + + 5.25-inch formats + 40 tracks, 1 head, 18 sectors, 128 bytes sector length, first sector id 1 + 40 tracks, 2 heads, 18 sectors, 128 bytes sector length, first sector id 1 + +*/ + + +#include "includes/xerox820.h" +#include "softlist.h" +/* Read/Write Handlers */ + +void xerox820_state::bankswitch(int bank) +{ + address_space &program = m_maincpu->space(AS_PROGRAM); + UINT8 *ram = m_ram->pointer(); + + if (bank) + { + /* ROM */ + program.install_rom(0x0000, 0x0fff, m_rom->base()); + program.unmap_readwrite(0x1000, 0x1fff); + program.install_ram(0x3000, 0x3fff, m_video_ram); + } + else + { + /* RAM */ + program.install_ram(0x0000, 0x3fff, ram); + } +} + +void xerox820ii_state::bankswitch(int bank) +{ + address_space &program = m_maincpu->space(AS_PROGRAM); + UINT8 *ram = m_ram->pointer(); + + if (bank) + { + /* ROM */ + program.install_rom(0x0000, 0x1fff, m_rom->base()); + program.unmap_readwrite(0x2000, 0x2fff); + program.install_ram(0x3000, 0x3fff, m_video_ram); + program.unmap_readwrite(0x4000, 0xbfff); + } + else + { + /* RAM */ + program.install_ram(0x0000, 0xbfff, ram); + } +} + +READ8_MEMBER( xerox820_state::fdc_r ) +{ + return m_fdc->gen_r(offset) ^ 0xff; +} + +WRITE8_MEMBER( xerox820_state::fdc_w ) +{ + m_fdc->gen_w(offset, data ^ 0xff); +} + +WRITE8_MEMBER( xerox820_state::scroll_w ) +{ + m_scroll = (offset >> 8) & 0x1f; +} + +#ifdef UNUSED_CODE +WRITE8_MEMBER( xerox820_state::x120_system_w ) +{ + /* + + bit signal description + + 0 DSEL0 drive select bit 0 (01=A, 10=B, 00=C, 11=D) + 1 DSEL1 drive select bit 1 + 2 SIDE side select + 3 VATT video attribute (0=inverse, 1=blinking) + 4 BELL bell trigger + 5 DENSITY density (0=double, 1=single) + 6 _MOTOR disk motor (0=on, 1=off) + 7 BANK memory bank switch (0=RAM, 1=ROM/video) + + */ +} +#endif + +WRITE8_MEMBER( xerox820ii_state::bell_w ) +{ + m_speaker->level_w(offset); +} + +WRITE8_MEMBER( xerox820ii_state::slden_w ) +{ + m_fdc->dden_w(offset); +} + +WRITE8_MEMBER( xerox820ii_state::chrom_w ) +{ + m_chrom = offset; +} + +WRITE8_MEMBER( xerox820ii_state::lowlite_w ) +{ + m_lowlite = data; +} + +WRITE8_MEMBER( xerox820ii_state::sync_w ) +{ + if (offset) + { + /* set external clocks for synchronous sio A */ + } + else + { + /* set internal clocks for asynchronous sio A */ + } +} + +/* Memory Maps */ + +static ADDRESS_MAP_START( xerox820_mem, AS_PROGRAM, 8, xerox820_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x3000, 0x3fff) AM_RAM AM_SHARE("video_ram") + AM_RANGE(0x4000, 0xffff) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START( xerox820_io, AS_IO, 8, xerox820_state ) + AM_RANGE(0x00, 0x00) AM_MIRROR(0xff03) AM_DEVWRITE(COM8116_TAG, com8116_device, str_w) + AM_RANGE(0x04, 0x07) AM_MIRROR(0xff00) AM_DEVREADWRITE(Z80SIO_TAG, z80sio0_device, ba_cd_r, ba_cd_w) + AM_RANGE(0x08, 0x0b) AM_MIRROR(0xff00) AM_DEVREADWRITE(Z80PIO_GP_TAG, z80pio_device, read_alt, write_alt) + AM_RANGE(0x0c, 0x0c) AM_MIRROR(0xff03) AM_DEVWRITE(COM8116_TAG, com8116_device, stt_w) + AM_RANGE(0x10, 0x13) AM_MIRROR(0xff00) AM_READWRITE(fdc_r, fdc_w) + AM_RANGE(0x14, 0x14) AM_MIRROR(0xff03) AM_MASK(0xff00) AM_WRITE(scroll_w) + AM_RANGE(0x18, 0x1b) AM_MIRROR(0xff00) AM_DEVREADWRITE(Z80CTC_TAG, z80ctc_device, read, write) + AM_RANGE(0x1c, 0x1f) AM_MIRROR(0xff00) AM_DEVREADWRITE(Z80PIO_KB_TAG, z80pio_device, read_alt, write_alt) +ADDRESS_MAP_END + +static ADDRESS_MAP_START( xerox820ii_mem, AS_PROGRAM, 8, xerox820ii_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x3000, 0x3fff) AM_RAM AM_SHARE("video_ram") + AM_RANGE(0xc000, 0xffff) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START( xerox820ii_io, AS_IO, 8, xerox820ii_state ) + AM_IMPORT_FROM(xerox820_io) + AM_RANGE(0x28, 0x29) AM_MIRROR(0xff00) AM_WRITE(bell_w) + AM_RANGE(0x30, 0x31) AM_MIRROR(0xff00) AM_WRITE(slden_w) + AM_RANGE(0x34, 0x35) AM_MIRROR(0xff00) AM_WRITE(chrom_w) + AM_RANGE(0x36, 0x36) AM_MIRROR(0xff00) AM_WRITE(lowlite_w) + AM_RANGE(0x68, 0x69) AM_MIRROR(0xff00) AM_WRITE(sync_w) +ADDRESS_MAP_END + +static ADDRESS_MAP_START( xerox168_mem, AS_PROGRAM, 16, xerox820ii_state ) + AM_RANGE(0x00000, 0x3ffff) AM_RAM + AM_RANGE(0xff000, 0xfffff) AM_ROM AM_REGION(I8086_TAG, 0) +ADDRESS_MAP_END + +static ADDRESS_MAP_START( mk83_mem, AS_PROGRAM, 8, xerox820_state ) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x3000, 0x6fff) AM_RAM + AM_RANGE(0x7000, 0x7fff) AM_RAM AM_SHARE("video_ram") + AM_RANGE(0x8000, 0xffff) AM_RAM +ADDRESS_MAP_END + + +/* Input Ports */ + +static INPUT_PORTS_START( xerox820 ) + // inputs defined in machine/keyboard.c +INPUT_PORTS_END + +TIMER_CALLBACK_MEMBER( bigboard_state::bigboard_beepoff ) +{ + m_beeper->set_state(0); +} + +/* Z80 PIO */ + +READ8_MEMBER( xerox820_state::kbpio_pa_r ) +{ + /* + + bit signal description + + 0 + 1 + 2 + 3 PBRDY keyboard data available + 4 8/N5 8"/5.25" disk select (0=5.25", 1=8") + 5 400/460 double sided disk detect (only on Etch 2 PCB) (0=SS, 1=DS) + 6 + 7 + + */ + + UINT8 data = 0; + + // keyboard + data |= m_kbpio->rdy_b() << 3; + + // floppy + data |= m_8n5 << 4; + data |= m_400_460 << 5; + + return data; +} + +WRITE8_MEMBER( xerox820_state::kbpio_pa_w ) +{ + /* + + bit signal description + + 0 _DVSEL1 drive select 1 + 1 _DVSEL2 drive select 2 + 2 SIDE side select + 3 + 4 + 5 + 6 NCSET2 display character set (inverted and connected to chargen A10) + 7 BANK bank switching (0=RAM, 1=ROM/videoram) + + */ + + /* 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) + { + int _8n5 = (floppy->get_form_factor() == floppy_image::FF_8); + + if (m_8n5 != _8n5) + { + m_8n5 = _8n5; + + m_fdc->set_unscaled_clock(m_8n5 ? XTAL_20MHz/10 : XTAL_20MHz/20); + } + + m_400_460 = !floppy->twosid_r(); + + floppy->mon_w(0); + + floppy->ss_w(BIT(data, 2)); + } + + /* display character set */ + m_ncset2 = !BIT(data, 6); + + /* bank switching */ + bankswitch(BIT(data, 7)); +} + +WRITE8_MEMBER( bigboard_state::kbpio_pa_w ) +{ + xerox820_state::kbpio_pa_w(space, offset, data); + + /* beeper on bigboard */ + if (BIT(data, 5) & (!m_bit5)) + { + machine().scheduler().timer_set(attotime::from_msec(40), timer_expired_delegate(FUNC(bigboard_state::bigboard_beepoff),this)); + m_beeper->set_state(1); + } + m_bit5 = BIT(data, 5); +} + +READ8_MEMBER( xerox820_state::kbpio_pb_r ) +{ + /* + + bit description + + 0 KB0 + 1 KB1 + 2 KB2 + 3 KB3 + 4 KB4 + 5 KB5 + 6 KB6 + 7 KB7 + + */ + + return m_kb->read() ^ 0xff; +} + +WRITE8_MEMBER( xerox820ii_state::rdpio_pb_w ) +{ + /* + + bit description + + 0 NBSY + 1 NMSG + 2 NC/D + 3 NREQ + 4 NI/O + 5 NSEL + 6 LS74 Q + 7 NRST + */ + + m_sasibus->write_sel(!BIT(data, 5)); + m_sasibus->write_rst(!BIT(data, 7)); + // TODO: LS74 Q +} + +WRITE_LINE_MEMBER( xerox820ii_state::rdpio_pardy_w ) +{ + // TODO +} + +/* Z80 CTC */ + +TIMER_DEVICE_CALLBACK_MEMBER( xerox820_state::ctc_tick ) +{ + m_ctc->trg0(1); + m_ctc->trg0(0); +} + +/* Z80 Daisy Chain */ + +static const z80_daisy_config xerox820_daisy_chain[] = +{ + { Z80SIO_TAG }, + { Z80PIO_KB_TAG }, + { Z80PIO_GP_TAG }, + { Z80CTC_TAG }, + { NULL } +}; + +/* WD1771 Interface */ + +static SLOT_INTERFACE_START( xerox820_floppies ) + SLOT_INTERFACE( "sa400", FLOPPY_525_SSSD_35T ) // Shugart SA-400 + SLOT_INTERFACE( "sa450", FLOPPY_525_DD ) // Shugart SA-450 + SLOT_INTERFACE( "sa800", FLOPPY_8_SSDD ) // Shugart SA-800 + SLOT_INTERFACE( "sa850", FLOPPY_8_DSDD ) // Shugart SA-850 +SLOT_INTERFACE_END + +void xerox820_state::update_nmi() +{ + int halt = m_maincpu->state_int(Z80_HALT); + int state = (halt && (m_fdc_irq || m_fdc_drq)) ? ASSERT_LINE : CLEAR_LINE; + + m_maincpu->set_input_line(INPUT_LINE_NMI, state); +} + +WRITE_LINE_MEMBER( xerox820_state::fdc_intrq_w ) +{ + m_fdc_irq = state; + + update_nmi(); +} + +WRITE_LINE_MEMBER( xerox820_state::fdc_drq_w ) +{ + m_fdc_drq = state; + + update_nmi(); +} + +/* COM8116 Interface */ + +WRITE_LINE_MEMBER( xerox820_state::fr_w ) +{ + m_sio->rxca_w(state); + m_sio->txca_w(state); +} + +/* Video */ + +UINT32 xerox820_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) +{ + UINT8 y,ra,chr,gfx; + UINT16 sy=0,ma=(m_scroll + 1) * 0x80,x; + const pen_t *pen=m_palette->pens(); + + m_framecnt++; + + for (y = 0; y < 24; y++) + { + if (ma > 0xb80) ma = 0; + + for (ra = 0; ra < 10; ra++) + { + UINT32 *p = &bitmap.pix32(sy++); + + for (x = ma; x < ma + 80; x++) + { + if (ra < 8) + { + chr = m_video_ram[x & XEROX820_VIDEORAM_MASK] ^ 0x80; + + /* Take care of flashing characters */ + if ((chr < 0x80) && (m_framecnt & 0x08)) + chr |= 0x80; + + /* get pattern of pixels for that character scanline */ + gfx = m_char_rom->base()[(m_ncset2 << 10) | (chr<<3) | ra ]; + } + else + gfx = 0xff; + + /* Display a scanline of a character (7 pixels) */ + *p++ = pen[0]; + *p++ = pen[BIT(gfx, 4) ^ 1]; + *p++ = pen[BIT(gfx, 3) ^ 1]; + *p++ = pen[BIT(gfx, 2) ^ 1]; + *p++ = pen[BIT(gfx, 1) ^ 1]; + *p++ = pen[BIT(gfx, 0) ^ 1]; + *p++ = pen[0]; + } + } + ma+=128; + } + return 0; +} + +/* Machine Initialization */ + +void xerox820_state::machine_start() +{ + // state saving + save_item(NAME(m_scroll)); + save_item(NAME(m_ncset2)); + save_item(NAME(m_vatt)); + save_item(NAME(m_fdc_irq)); + save_item(NAME(m_fdc_drq)); + save_item(NAME(m_8n5)); + save_item(NAME(m_400_460)); +} + +void xerox820_state::machine_reset() +{ + bankswitch(1); + + m_fdc->reset(); +} + +void bigboard_state::machine_reset() +{ + bankswitch(1); + + /* bigboard has a one-pulse output to drive a user-supplied beeper */ + m_beeper->set_state(0); + m_beeper->set_frequency(950); + + m_fdc->reset(); +} + +void xerox820ii_state::machine_reset() +{ + bankswitch(1); + + m_fdc->reset(); +} + + +/* F4 Character Displayer */ +static const gfx_layout xerox820_charlayout = +{ + 8, 8, /* 8 x 8 characters */ + 256, /* 256 characters */ + 1, /* 1 bits per pixel */ + { 0 }, /* no bitplanes */ + /* x offsets */ + { 0, 1, 2, 3, 4, 5, 6, 7 }, + /* y offsets */ + { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, + 8*8 /* every char takes 8 bytes */ +}; + +static const gfx_layout xerox820_gfxlayout = +{ + 8, 8, /* 8 x 8 characters */ + 256, /* 256 characters */ + 1, /* 1 bits per pixel */ + { 0 }, /* no bitplanes */ + /* x offsets */ + { 0, 1, 2, 3, 4, 5, 6, 7 }, + /* y offsets */ + { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8 }, + 8*8 /* every char takes 8 bytes */ +}; + +static GFXDECODE_START( xerox820 ) + GFXDECODE_ENTRY( "chargen", 0x0000, xerox820_charlayout, 0, 1 ) +GFXDECODE_END + +static GFXDECODE_START( xerox820ii ) + GFXDECODE_ENTRY( "chargen", 0x0000, xerox820_charlayout, 0, 1 ) + GFXDECODE_ENTRY( "chargen", 0x0800, xerox820_gfxlayout, 0, 1 ) +GFXDECODE_END + +/* Machine Drivers */ + +static MACHINE_CONFIG_START( xerox820, xerox820_state ) + /* basic machine hardware */ + MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_20MHz/8) + MCFG_CPU_PROGRAM_MAP(xerox820_mem) + MCFG_CPU_IO_MAP(xerox820_io) + MCFG_CPU_CONFIG(xerox820_daisy_chain) + + /* video hardware */ + MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) + MCFG_SCREEN_UPDATE_DRIVER(xerox820_state, screen_update) + MCFG_SCREEN_RAW_PARAMS(XTAL_10_69425MHz, 700, 0, 560, 260, 0, 240) + + MCFG_GFXDECODE_ADD("gfxdecode", "palette", xerox820) + MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette") + + /* devices */ + MCFG_DEVICE_ADD(Z80PIO_KB_TAG, Z80PIO, XTAL_20MHz/8) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_Z80PIO_IN_PA_CB(READ8(xerox820_state, kbpio_pa_r)) + MCFG_Z80PIO_OUT_PA_CB(WRITE8(xerox820_state, kbpio_pa_w)) + MCFG_Z80PIO_IN_PB_CB(READ8(xerox820_state, kbpio_pb_r)) + + MCFG_DEVICE_ADD(Z80PIO_GP_TAG, Z80PIO, XTAL_20MHz/8) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + + MCFG_DEVICE_ADD(Z80CTC_TAG, Z80CTC, XTAL_20MHz/8) + MCFG_Z80CTC_INTR_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_Z80CTC_ZC0_CB(DEVWRITELINE(Z80CTC_TAG, z80ctc_device, trg1)) + MCFG_Z80CTC_ZC2_CB(DEVWRITELINE(Z80CTC_TAG, z80ctc_device, trg3)) + //MCFG_TIMER_DRIVER_ADD_PERIODIC("ctc", xerox820_state, ctc_tick, attotime::from_hz(XTAL_20MHz/8)) + + MCFG_FD1771_ADD(FD1771_TAG, XTAL_20MHz/20) + MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(xerox820_state, fdc_intrq_w)) + MCFG_WD_FDC_DRQ_CALLBACK(WRITELINE(xerox820_state, fdc_drq_w)) + MCFG_FLOPPY_DRIVE_ADD(FD1771_TAG":0", xerox820_floppies, "sa400", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_ADD(FD1771_TAG":1", xerox820_floppies, "sa400", floppy_image_device::default_floppy_formats) + + MCFG_Z80SIO0_ADD(Z80SIO_TAG, XTAL_20MHz/8, 0, 0, 0, 0) + MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_txd)) + MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_dtr)) + MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_rts)) + MCFG_Z80DART_OUT_TXDB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_txd)) + MCFG_Z80DART_OUT_DTRB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_dtr)) + MCFG_Z80DART_OUT_RTSB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_rts)) + MCFG_Z80DART_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + + MCFG_RS232_PORT_ADD(RS232_A_TAG, default_rs232_devices, NULL) + MCFG_RS232_RXD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio0_device, rxa_w)) + + MCFG_RS232_PORT_ADD(RS232_B_TAG, default_rs232_devices, NULL) + MCFG_RS232_RXD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio0_device, rxb_w)) + + MCFG_DEVICE_ADD(COM8116_TAG, COM8116, XTAL_5_0688MHz) + MCFG_COM8116_FR_HANDLER(WRITELINE(xerox820_state, fr_w)) + MCFG_COM8116_FT_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80dart_device, rxtxcb_w)) + + MCFG_DEVICE_ADD(KEYBOARD_TAG, XEROX_820_KEYBOARD, 0) + MCFG_XEROX_820_KEYBOARD_KBSTB_CALLBACK(DEVWRITELINE(Z80PIO_KB_TAG, z80pio_device, strobe_b)) + + /* internal ram */ + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("64K") + + // software lists + MCFG_SOFTWARE_LIST_ADD("flop_list", "xerox820") +MACHINE_CONFIG_END + +static MACHINE_CONFIG_DERIVED_CLASS( bigboard, xerox820, bigboard_state ) + /* sound hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD("beeper", BEEP, 0) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00) /* bigboard only */ +MACHINE_CONFIG_END + +static MACHINE_CONFIG_START( xerox820ii, xerox820ii_state ) + /* basic machine hardware */ + MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_16MHz/4) + MCFG_CPU_PROGRAM_MAP(xerox820ii_mem) + MCFG_CPU_IO_MAP(xerox820ii_io) + MCFG_CPU_CONFIG(xerox820_daisy_chain) + + /* video hardware */ + MCFG_SCREEN_ADD(SCREEN_TAG, RASTER) + MCFG_SCREEN_UPDATE_DRIVER(xerox820ii_state, screen_update) + MCFG_SCREEN_RAW_PARAMS(XTAL_10_69425MHz, 700, 0, 560, 260, 0, 240) + + MCFG_GFXDECODE_ADD("gfxdecode", "palette", xerox820ii) + MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette") + + /* sound hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) + + /* devices */ + MCFG_DEVICE_ADD(Z80PIO_KB_TAG, Z80PIO, XTAL_16MHz/4) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_Z80PIO_IN_PA_CB(READ8(xerox820_state, kbpio_pa_r)) + MCFG_Z80PIO_OUT_PA_CB(WRITE8(xerox820_state, kbpio_pa_w)) + MCFG_Z80PIO_IN_PB_CB(READ8(xerox820_state, kbpio_pb_r)) + + MCFG_DEVICE_ADD(Z80PIO_GP_TAG, Z80PIO, XTAL_16MHz/4) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + + MCFG_DEVICE_ADD(Z80PIO_RD_TAG, Z80PIO, XTAL_20MHz/8) + MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_Z80PIO_IN_PA_CB(DEVREAD8("sasi_data_in", input_buffer_device, read)) + MCFG_Z80PIO_OUT_PA_CB(DEVWRITE8("sasi_data_out", output_latch_device, write)) + MCFG_Z80PIO_OUT_ARDY_CB(WRITELINE(xerox820ii_state, rdpio_pardy_w)) + MCFG_Z80PIO_IN_PB_CB(DEVREAD8("sasi_ctrl_in", input_buffer_device, read)) + MCFG_Z80PIO_OUT_PB_CB(WRITE8(xerox820ii_state, rdpio_pb_w)) + + MCFG_DEVICE_ADD(Z80CTC_TAG, Z80CTC, XTAL_16MHz/4) + MCFG_Z80CTC_INTR_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + MCFG_Z80CTC_ZC0_CB(DEVWRITELINE(Z80CTC_TAG, z80ctc_device, trg1)) + MCFG_Z80CTC_ZC2_CB(DEVWRITELINE(Z80CTC_TAG, z80ctc_device, trg3)) + //MCFG_TIMER_DRIVER_ADD_PERIODIC("ctc", xerox820_state, ctc_tick, attotime::from_hz(XTAL_16MHz/4)) + + MCFG_FD1797_ADD(FD1797_TAG, XTAL_16MHz/8) + MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(xerox820_state, fdc_intrq_w)) + MCFG_WD_FDC_DRQ_CALLBACK(WRITELINE(xerox820_state, fdc_drq_w)) + MCFG_FLOPPY_DRIVE_ADD(FD1797_TAG":0", xerox820_floppies, "sa450", floppy_image_device::default_floppy_formats) + MCFG_FLOPPY_DRIVE_ADD(FD1797_TAG":1", xerox820_floppies, "sa450", floppy_image_device::default_floppy_formats) + + MCFG_Z80SIO0_ADD(Z80SIO_TAG, XTAL_16MHz/4, 0, 0, 0, 0) + MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_txd)) + MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_dtr)) + MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE(RS232_A_TAG, rs232_port_device, write_rts)) + MCFG_Z80DART_OUT_TXDB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_txd)) + MCFG_Z80DART_OUT_DTRB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_dtr)) + MCFG_Z80DART_OUT_RTSB_CB(DEVWRITELINE(RS232_B_TAG, rs232_port_device, write_rts)) + MCFG_Z80DART_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0)) + + MCFG_RS232_PORT_ADD(RS232_A_TAG, default_rs232_devices, NULL) + MCFG_RS232_RXD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio0_device, rxa_w)) + + MCFG_RS232_PORT_ADD(RS232_B_TAG, default_rs232_devices, NULL) + MCFG_RS232_RXD_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80sio0_device, rxb_w)) + + MCFG_DEVICE_ADD(COM8116_TAG, COM8116, XTAL_5_0688MHz) + MCFG_COM8116_FR_HANDLER(WRITELINE(xerox820_state, fr_w)) + MCFG_COM8116_FT_HANDLER(DEVWRITELINE(Z80SIO_TAG, z80dart_device, rxtxcb_w)) + + MCFG_DEVICE_ADD(KEYBOARD_TAG, XEROX_820_KEYBOARD, 0) + MCFG_XEROX_820_KEYBOARD_KBSTB_CALLBACK(DEVWRITELINE(Z80PIO_KB_TAG, z80pio_device, strobe_b)) + + // SASI bus + MCFG_DEVICE_ADD(SASIBUS_TAG, SCSI_PORT, 0) + MCFG_SCSI_DATA_INPUT_BUFFER("sasi_data_in") + MCFG_SCSI_BSY_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit0)) MCFG_DEVCB_XOR(1) + MCFG_SCSI_MSG_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit1)) MCFG_DEVCB_XOR(1) + MCFG_SCSI_CD_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit2)) MCFG_DEVCB_XOR(1) + MCFG_SCSI_REQ_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit3)) MCFG_DEVCB_XOR(1) + MCFG_SCSI_IO_HANDLER(DEVWRITELINE("sasi_ctrl_in", input_buffer_device, write_bit4)) MCFG_DEVCB_XOR(1) + + MCFG_SCSIDEV_ADD(SASIBUS_TAG ":" SCSI_PORT_DEVICE1, "harddisk", SA1403D, SCSI_ID_0) + + MCFG_SCSI_OUTPUT_LATCH_ADD("sasi_data_out", SASIBUS_TAG) + MCFG_DEVICE_ADD("sasi_data_in", INPUT_BUFFER, 0) + MCFG_DEVICE_ADD("sasi_ctrl_in", INPUT_BUFFER, 0) + + /* internal ram */ + MCFG_RAM_ADD(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("64K") + + // software lists + MCFG_SOFTWARE_LIST_ADD("flop_list", "xerox820ii") +MACHINE_CONFIG_END + +static MACHINE_CONFIG_DERIVED( xerox168, xerox820ii ) + MCFG_CPU_ADD(I8086_TAG, I8086, 4770000) + MCFG_CPU_PROGRAM_MAP(xerox168_mem) + + /* internal ram */ + MCFG_RAM_MODIFY(RAM_TAG) + MCFG_RAM_DEFAULT_SIZE("192K") + MCFG_RAM_EXTRA_OPTIONS("320K") +MACHINE_CONFIG_END + +static MACHINE_CONFIG_DERIVED( mk83, xerox820 ) + MCFG_CPU_MODIFY(Z80_TAG) + MCFG_CPU_PROGRAM_MAP(mk83_mem) +MACHINE_CONFIG_END + +/* ROMs */ + +ROM_START( bigboard ) + ROM_REGION( 0x1000, Z80_TAG, 0 ) + ROM_LOAD( "bigboard.u67", 0x0000, 0x0800, CRC(5a85a228) SHA1(d51a2cbd0aae80315bda9530275aabfe8305364e) ) + + ROM_REGION( 0x800, "chargen", 0 ) + ROM_LOAD( "bigboard.u73", 0x0000, 0x0800, CRC(10bf0d81) SHA1(7ec73670a4d9d6421a5d6a4c4edc8b7c87923f6c) ) +ROM_END + +#define rom_mk82 rom_bigboard + +ROM_START( x820 ) + ROM_REGION( 0x1000, Z80_TAG, 0 ) + ROM_DEFAULT_BIOS( "v20" ) + ROM_SYSTEM_BIOS( 0, "v10", "Xerox Monitor v1.0" ) + ROMX_LOAD( "x820v10.u64", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(1) ) + ROMX_LOAD( "x820v10.u63", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(1) ) + ROM_SYSTEM_BIOS( 1, "v20", "Xerox Monitor v2.0" ) + ROMX_LOAD( "x820v20.u64", 0x0000, 0x0800, CRC(2fc227e2) SHA1(b4ea0ae23d281a687956e8a514cb364a1372678e), ROM_BIOS(2) ) + ROMX_LOAD( "x820v20.u63", 0x0800, 0x0800, CRC(bc11f834) SHA1(4fd2b209a6e6ff9b0c41800eb5228c34a0d7f7ef), ROM_BIOS(2) ) + ROM_SYSTEM_BIOS( 2, "smart23", "MICROCode SmartROM v2.3" ) + ROMX_LOAD( "mxkx25a.u64", 0x0000, 0x0800, CRC(7ec5f100) SHA1(5d0ff35a51aa18afc0d9c20ef99ff5d9d3f2075b), ROM_BIOS(3) ) + ROMX_LOAD( "mxkx25b.u63", 0x0800, 0x0800, CRC(a7543798) SHA1(886e617e1003d13f86f33085cbd49391b77291a3), ROM_BIOS(3) ) + ROM_SYSTEM_BIOS( 3, "plus2", "MICROCode Plus2 v0.2a" ) + ROMX_LOAD( "p2x25a.u64", 0x0000, 0x0800, CRC(3ccd7a8f) SHA1(6e46c88f03fc7289595dd6bec95e23bb13969525), ROM_BIOS(4) ) + ROMX_LOAD( "p2x25b.u63", 0x0800, 0x0800, CRC(1e580391) SHA1(e91f8ce82586df33c0d6d02eb005e8079f4de67d), ROM_BIOS(4) ) + + ROM_REGION( 0x800, "chargen", 0 ) + ROM_LOAD( "x820.u92", 0x0000, 0x0800, CRC(b823fa98) SHA1(ad0ea346aa257a53ad5701f4201896a2b3a0f928) ) +ROM_END + +ROM_START( x820ii ) + ROM_REGION( 0x2000, Z80_TAG, 0 ) + ROM_DEFAULT_BIOS( "v404" ) + ROM_SYSTEM_BIOS( 0, "v400", "Balcones Operating System v4.00" ) // Initial U.S. 3-ROM set: support for double density disks + ROMX_LOAD( "v400.u33", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(1) ) + ROMX_LOAD( "v400.u34", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(1) ) + ROMX_LOAD( "v400.u35", 0x1000, 0x0800, NO_DUMP, ROM_BIOS(1) ) + ROM_SYSTEM_BIOS( 1, "v401", "Balcones Operating System v4.01" ) // Corrected overflow problem with large data files + ROMX_LOAD( "v401.u33", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(2) ) + ROMX_LOAD( "v401.u34", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(2) ) + ROMX_LOAD( "v401.u35", 0x1000, 0x0800, NO_DUMP, ROM_BIOS(2) ) + ROM_SYSTEM_BIOS( 2, "v402", "Balcones Operating System v4.02" ) // Rank Xerox (European) boot ROM version of US 4.01 + ROMX_LOAD( "v402.u33", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(3) ) + ROMX_LOAD( "v402.u34", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(3) ) + ROMX_LOAD( "v402.u35", 0x1000, 0x0800, NO_DUMP, ROM_BIOS(3) ) + ROM_SYSTEM_BIOS( 3, "v403", "Balcones Operating System v4.03" ) // Incorporate programmable communications option and support for the low-profile keyboard (4-ROM set and type-ahead input buffer) + ROMX_LOAD( "v403.u33", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(4) ) + ROMX_LOAD( "v403.u34", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(4) ) + ROMX_LOAD( "v403.u35", 0x1000, 0x0800, NO_DUMP, ROM_BIOS(4) ) + ROMX_LOAD( "v403.u36", 0x1800, 0x0800, NO_DUMP, ROM_BIOS(4) ) + ROM_SYSTEM_BIOS( 4, "v404", "Balcones Operating System v4.04" ) // Changes sign-on message from Xerox 820-II to Xerox + ROMX_LOAD( "537p3652.u33", 0x0000, 0x0800, CRC(7807cfbb) SHA1(bd3cc5cc5c59c84a50747aae5c17eb4617b0dbc3), ROM_BIOS(5) ) + ROMX_LOAD( "537p3653.u34", 0x0800, 0x0800, CRC(a9c6c0c3) SHA1(c2da9d1bf0da96e6b8bfa722783e411d2fe6deb9), ROM_BIOS(5) ) + ROMX_LOAD( "537p3654.u35", 0x1000, 0x0800, CRC(a8a07223) SHA1(e8ae1ebf2d7caf76771205f577b88ae493836ac9), ROM_BIOS(5) ) + ROMX_LOAD( "v404.u36", 0x1800, 0x0800, NO_DUMP, ROM_BIOS(5) ) // fitted for low-profile keyboard only + ROM_SYSTEM_BIOS( 5, "v50", "Balcones Operating System v5.0" ) // Operating system modifications for DEM and new 5.25" disk controller (4 new boot ROMs) + ROMX_LOAD( "v50.u33", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(6) ) + ROMX_LOAD( "v50.u34", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(6) ) + ROMX_LOAD( "v50.u35", 0x1000, 0x0800, NO_DUMP, ROM_BIOS(6) ) + ROMX_LOAD( "v50.u36", 0x1800, 0x0800, NO_DUMP, ROM_BIOS(6) ) // fitted for low-profile keyboard only + + ROM_REGION( 0x1000, "chargen", 0 ) + ROM_LOAD( "x820ii.u57", 0x0000, 0x0800, CRC(1a50f600) SHA1(df4470c80611c14fa7ea8591f741fbbecdfe4fd9) ) + ROM_LOAD( "x820ii.u58", 0x0800, 0x0800, CRC(aca4b9b3) SHA1(77f41470b0151945b8d3c3a935fc66409e9157b3) ) +ROM_END + +ROM_START( x168 ) + ROM_REGION( 0x2000, Z80_TAG, 0 ) + ROM_DEFAULT_BIOS( "v404" ) + ROM_SYSTEM_BIOS( 0, "v404", "Balcones Operating System v4.04" ) // Changes sign-on message from Xerox 820-II to Xerox + ROMX_LOAD( "537p3652.u33", 0x0000, 0x0800, CRC(7807cfbb) SHA1(bd3cc5cc5c59c84a50747aae5c17eb4617b0dbc3), ROM_BIOS(1) ) + ROMX_LOAD( "537p3653.u34", 0x0800, 0x0800, CRC(a9c6c0c3) SHA1(c2da9d1bf0da96e6b8bfa722783e411d2fe6deb9), ROM_BIOS(1) ) + ROMX_LOAD( "537p3654.u35", 0x1000, 0x0800, CRC(a8a07223) SHA1(e8ae1ebf2d7caf76771205f577b88ae493836ac9), ROM_BIOS(1) ) + ROMX_LOAD( "v404.u36", 0x1800, 0x0800, NO_DUMP, ROM_BIOS(1) ) // fitted for low-profile keyboard only + ROM_SYSTEM_BIOS( 1, "v50", "Balcones Operating System v5.0" ) // Operating system modifications for DEM and new 5.25" disk controller (4 new boot ROMs) + ROMX_LOAD( "v50.u33", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(2) ) + ROMX_LOAD( "v50.u34", 0x0800, 0x0800, NO_DUMP, ROM_BIOS(2) ) + ROMX_LOAD( "v50.u35", 0x1000, 0x0800, NO_DUMP, ROM_BIOS(2) ) + ROMX_LOAD( "v50.u36", 0x1800, 0x0800, NO_DUMP, ROM_BIOS(2) ) // fitted for low-profile keyboard only + + ROM_REGION( 0x1000, I8086_TAG, 0 ) + ROM_LOAD( "8086.u33", 0x0000, 0x1000, CRC(ee49e3dc) SHA1(a5f20c74fc53f9d695d8894534ab69a39e2c38d8) ) + + ROM_REGION( 0x1000, "chargen", 0 ) + ROM_LOAD( "x820ii.u57", 0x0000, 0x0800, CRC(1a50f600) SHA1(df4470c80611c14fa7ea8591f741fbbecdfe4fd9) ) + ROM_LOAD( "x820ii.u58", 0x0800, 0x0800, CRC(aca4b9b3) SHA1(77f41470b0151945b8d3c3a935fc66409e9157b3) ) +ROM_END + +ROM_START( mk83 ) + ROM_REGION( 0x1000, Z80_TAG, 0 ) + ROM_LOAD( "2732mk83.bin", 0x0000, 0x1000, CRC(a845c7e1) SHA1(3ccf629c5cd384953794ac4a1d2b45678bd40e92) ) + + ROM_REGION( 0x800, "chargen", 0 ) + ROM_LOAD( "2716mk83.bin", 0x0000, 0x0800, CRC(10bf0d81) SHA1(7ec73670a4d9d6421a5d6a4c4edc8b7c87923f6c) ) +ROM_END + +/* System Drivers */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ +COMP( 1980, bigboard, 0, 0, bigboard, xerox820, driver_device, 0, "Digital Research Computers", "Big Board", 0 ) +COMP( 1981, x820, bigboard, 0, xerox820, xerox820, driver_device, 0, "Xerox", "Xerox 820", MACHINE_NO_SOUND_HW ) +COMP( 1982, mk82, bigboard, 0, bigboard, xerox820, driver_device, 0, "Scomar", "MK-82", 0 ) +COMP( 1983, x820ii, 0, 0, xerox820ii, xerox820, driver_device, 0, "Xerox", "Xerox 820-II", MACHINE_NOT_WORKING ) +COMP( 1983, x168, x820ii, 0, xerox168, xerox820, driver_device, 0, "Xerox", "Xerox 16/8", MACHINE_NOT_WORKING ) +COMP( 1983, mk83, x820ii, 0, mk83, xerox820, driver_device, 0, "Scomar", "MK-83", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW ) |