diff options
Diffstat (limited to 'src/mame/drivers/zrt80.c')
-rw-r--r-- | src/mame/drivers/zrt80.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/src/mame/drivers/zrt80.c b/src/mame/drivers/zrt80.c new file mode 100644 index 00000000000..fa192a2050a --- /dev/null +++ b/src/mame/drivers/zrt80.c @@ -0,0 +1,323 @@ +// 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<UINT8> 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<cpu_device> m_maincpu; + required_device<mc6845_device> m_crtc; + required_device<ins8250_device> m_8250; + required_device<beep_device> m_beep; +public: + required_device<palette_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) |