// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** DEC ZRT-80 12/05/2009 Skeleton driver. 16/02/2011 Working. The beeper is external, frequency not known. I've made a reasonable assumption of frequency and lengths. Make sure 'mode' dipswitch is set to 'local' so you can see your typing. ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "video/mc6845.h" #include "machine/ins8250.h" #include "machine/keyboard.h" #include "sound/beep.h" #define KEYBOARD_TAG "keyboard" class zrt80_state : public driver_device { public: enum { TIMER_BEEP_OFF }; zrt80_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_p_videoram(*this, "videoram"), m_maincpu(*this, "maincpu"), m_crtc(*this, "crtc"), m_8250(*this, "ins8250"), m_beep(*this, "beeper"), m_palette(*this, "palette") { } DECLARE_READ8_MEMBER(zrt80_10_r); DECLARE_WRITE8_MEMBER(zrt80_30_w); DECLARE_WRITE8_MEMBER(zrt80_38_w); DECLARE_WRITE8_MEMBER(kbd_put); MC6845_UPDATE_ROW(crtc_update_row); const UINT8 *m_p_chargen; required_shared_ptr m_p_videoram; protected: virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); private: UINT8 m_term_data; virtual void machine_reset(); virtual void video_start(); required_device m_maincpu; required_device m_crtc; required_device m_8250; required_device m_beep; public: required_device m_palette; }; READ8_MEMBER( zrt80_state::zrt80_10_r ) { UINT8 ret = m_term_data; m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); return ret; } void zrt80_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_BEEP_OFF: m_beep->set_state(0); break; default: assert_always(FALSE, "Unknown id in zrt80_state::device_timer"); } } WRITE8_MEMBER(zrt80_state::zrt80_30_w) { timer_set(attotime::from_msec(100), TIMER_BEEP_OFF); m_beep->set_state(1); } WRITE8_MEMBER(zrt80_state::zrt80_38_w) { timer_set(attotime::from_msec(400), TIMER_BEEP_OFF); m_beep->set_state(1); } static ADDRESS_MAP_START(zrt80_mem, AS_PROGRAM, 8, zrt80_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x0fff) AM_ROM // Z25 - Main firmware AM_RANGE(0x1000, 0x1fff) AM_ROM // Z24 - Expansion AM_RANGE(0x4000, 0x43ff) AM_RAM // Board RAM // Normally video RAM is 0x800 but could be expanded up to 8K AM_RANGE(0xc000, 0xdfff) AM_RAM AM_SHARE("videoram") // Video RAM ADDRESS_MAP_END static ADDRESS_MAP_START( zrt80_io, AS_IO, 8, zrt80_state) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) AM_RANGE(0x00, 0x07) AM_DEVREADWRITE("ins8250", ins8250_device, ins8250_r, ins8250_w ) AM_RANGE(0x08, 0x08) AM_DEVWRITE("crtc", mc6845_device, address_w) AM_RANGE(0x09, 0x09) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) AM_RANGE(0x10, 0x17) AM_READ(zrt80_10_r) AM_RANGE(0x18, 0x1F) AM_READ_PORT("DIPSW2") AM_RANGE(0x20, 0x27) AM_READ_PORT("DIPSW3") AM_RANGE(0x30, 0x37) AM_WRITE(zrt80_30_w) AM_RANGE(0x38, 0x3F) AM_WRITE(zrt80_38_w) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( zrt80 ) PORT_START("DIPSW1") PORT_DIPNAME( 0x01, 0x01, "Composite Sync" ) PORT_DIPSETTING( 0x01, "Negative" ) PORT_DIPSETTING( 0x00, "Positive" ) PORT_DIPNAME( 0x02, 0x02, "Vertical Sync" ) PORT_DIPSETTING( 0x02, "Negative" ) PORT_DIPSETTING( 0x00, "Positive" ) PORT_DIPNAME( 0x04, 0x00, "Video" ) PORT_DIPSETTING( 0x04, "Negative" ) PORT_DIPSETTING( 0x00, "Positive" ) PORT_DIPNAME( 0x08, 0x08, "Keypad" ) PORT_DIPSETTING( 0x08, "Numeric" ) PORT_DIPSETTING( 0x00, "Alternate Keyboard" ) PORT_DIPNAME( 0x10, 0x10, "Horizontal Sync" ) PORT_DIPSETTING( 0x10, "Negative" ) PORT_DIPSETTING( 0x00, "Positive" ) PORT_DIPNAME( 0x20, 0x20, "CPU" ) PORT_DIPSETTING( 0x20, "Operating" ) PORT_DIPSETTING( 0x00, "Reset" ) PORT_DIPNAME( 0x40, 0x40, "Keyboard strobe" ) PORT_DIPSETTING( 0x40, "Negative" ) PORT_DIPSETTING( 0x00, "Positive" ) PORT_DIPNAME( 0x80, 0x00, "Beeper" ) PORT_DIPSETTING( 0x80, "Silent" ) PORT_DIPSETTING( 0x00, "Enable" ) PORT_START("DIPSW2") PORT_DIPNAME( 0x0f, 0x05, "Baud rate" ) PORT_DIPSETTING( 0x00, "50" ) PORT_DIPSETTING( 0x01, "75" ) PORT_DIPSETTING( 0x02, "110" ) PORT_DIPSETTING( 0x03, "134.5" ) PORT_DIPSETTING( 0x04, "150" ) PORT_DIPSETTING( 0x05, "300" ) PORT_DIPSETTING( 0x06, "600" ) PORT_DIPSETTING( 0x07, "1200" ) PORT_DIPSETTING( 0x08, "1800" ) PORT_DIPSETTING( 0x09, "2000" ) PORT_DIPSETTING( 0x0a, "2400" ) PORT_DIPSETTING( 0x0b, "3600" ) PORT_DIPSETTING( 0x0c, "4800" ) PORT_DIPSETTING( 0x0d, "7200" ) PORT_DIPSETTING( 0x0e, "9600" ) PORT_DIPSETTING( 0x0f, "19200" ) PORT_DIPNAME( 0x30, 0x20, "Parity" ) PORT_DIPSETTING( 0x00, "Odd" ) PORT_DIPSETTING( 0x10, "Even" ) PORT_DIPSETTING( 0x20, "Marking" ) PORT_DIPSETTING( 0x30, "Spacing" ) PORT_DIPNAME( 0x40, 0x40, "Handshake" ) PORT_DIPSETTING( 0x40, "CTS" ) PORT_DIPSETTING( 0x00, "XON/XOFF" ) PORT_DIPNAME( 0x80, 0x80, "Line Feed" ) PORT_DIPSETTING( 0x80, "No LF on CR" ) PORT_DIPSETTING( 0x00, "Auto" ) PORT_START("DIPSW3") PORT_DIPNAME( 0x07, 0x07, "Display" ) PORT_DIPSETTING( 0x00, "96 x 24 15750Hz, 50Hz" ) PORT_DIPSETTING( 0x01, "80 x 48 15750Hz, 50Hz" ) PORT_DIPSETTING( 0x02, "80 x 24 15750Hz, 50Hz" ) PORT_DIPSETTING( 0x03, "96 x 24 15750Hz, 60Hz" ) PORT_DIPSETTING( 0x04, "80 x 48 18700Hz, 50Hz" ) PORT_DIPSETTING( 0x05, "80 x 24 17540Hz, 60Hz" ) PORT_DIPSETTING( 0x06, "80 x 48 15750Hz, 60Hz" ) PORT_DIPSETTING( 0x07, "80 x 24 15750Hz, 60Hz" ) PORT_DIPNAME( 0x18, 0x18, "Emulation" ) PORT_DIPSETTING( 0x00, "Adds" ) PORT_DIPSETTING( 0x08, "Beehive" ) PORT_DIPSETTING( 0x10, "LSI ADM-3" ) PORT_DIPSETTING( 0x18, "Heath H-19" ) PORT_DIPNAME( 0x20, 0x00, "Mode" ) PORT_DIPSETTING( 0x20, "Line" ) PORT_DIPSETTING( 0x00, "Local" ) PORT_DIPNAME( 0x40, 0x40, "Duplex" ) PORT_DIPSETTING( 0x40, "Full" ) PORT_DIPSETTING( 0x00, "Half" ) PORT_DIPNAME( 0x80, 0x80, "Wraparound" ) PORT_DIPSETTING( 0x80, "Disabled" ) PORT_DIPSETTING( 0x00, "Enabled" ) INPUT_PORTS_END void zrt80_state::machine_reset() { m_beep->set_frequency(800); m_term_data = 0; } void zrt80_state::video_start() { m_p_chargen = memregion("chargen")->base(); } MC6845_UPDATE_ROW( zrt80_state::crtc_update_row ) { const rgb_t *palette = m_palette->palette()->entry_list_raw(); UINT8 chr,gfx,inv; UINT16 mem,x; UINT32 *p = &bitmap.pix32(y); UINT8 polarity = ioport("DIPSW1")->read() & 4 ? 0xff : 0; for (x = 0; x < x_count; x++) { inv = polarity; if (x == cursor_x) inv ^= 0xff; mem = (ma + x) & 0x1fff; chr = m_p_videoram[mem]; if BIT(chr, 7) { inv ^= 0xff; chr &= 0x7f; } gfx = m_p_chargen[(chr<<4) | ra] ^ inv; /* Display a scanline of a character */ *p++ = palette[BIT(gfx, 7)]; *p++ = palette[BIT(gfx, 6)]; *p++ = palette[BIT(gfx, 5)]; *p++ = palette[BIT(gfx, 4)]; *p++ = palette[BIT(gfx, 3)]; *p++ = palette[BIT(gfx, 2)]; *p++ = palette[BIT(gfx, 1)]; *p++ = palette[BIT(gfx, 0)]; } } WRITE8_MEMBER( zrt80_state::kbd_put ) { m_term_data = data; m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); } /* F4 Character Displayer */ static const gfx_layout zrt80_charlayout = { 8, 16, /* 8 x 16 characters */ 128, /* 128 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*16 /* every char takes 16 bytes */ }; static GFXDECODE_START( zrt80 ) GFXDECODE_ENTRY( "chargen", 0x0000, zrt80_charlayout, 0, 1 ) GFXDECODE_END static MACHINE_CONFIG_START( zrt80, zrt80_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_2_4576MHz) MCFG_CPU_PROGRAM_MAP(zrt80_mem) MCFG_CPU_IO_MAP(zrt80_io) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update) MCFG_SCREEN_SIZE(640, 200) MCFG_SCREEN_VISIBLE_AREA(0, 640 - 1, 0, 200 - 1) MCFG_GFXDECODE_ADD("gfxdecode", "palette", zrt80) MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette") /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("beeper", BEEP, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) /* Devices */ MCFG_MC6845_ADD("crtc", MC6845, "screen", XTAL_20MHz / 8) MCFG_MC6845_SHOW_BORDER_AREA(false) MCFG_MC6845_CHAR_WIDTH(8) /*?*/ MCFG_MC6845_UPDATE_ROW_CB(zrt80_state, crtc_update_row) MCFG_DEVICE_ADD( "ins8250", INS8250, 2457600 ) MCFG_INS8250_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0) MCFG_GENERIC_KEYBOARD_CB(WRITE8(zrt80_state, kbd_put)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( zrt80 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD("zrt80mon.z25", 0x0000, 0x1000, CRC(e6ea96dc) SHA1(e3075e30bb2b85f9288d0b8b8cdf1d2b4f7586fd) ) //z24 is 2nd chip, used as expansion ROM_REGION( 0x0800, "chargen", 0 ) ROM_LOAD("zrt80chr.z30", 0x0000, 0x0800, CRC(4dbdc60f) SHA1(20e393f7207a8440029c8290cdf2f121d317a37e) ) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1982, zrt80, 0, 0, zrt80, zrt80, driver_device, 0, "Digital Research Computers", "ZRT-80", 0)