diff options
| author | 2014-01-21 14:35:19 +0000 | |
|---|---|---|
| committer | 2014-01-21 14:35:19 +0000 | |
| commit | 50ab23c87e5e16cca7d079e059f5601a4ab72e92 (patch) | |
| tree | 8fe2b8ad9f97ebda66e4506fafffc03aea62fdd5 /src/mess/drivers/mx2178.c | |
| parent | a8ec93faec19b0c5eecdd57c61254b8bbda65a9f (diff) | |
(MESS) new not working system [Al Kossow, Robbbert]
---------------------------
Memorex 2178
Diffstat (limited to 'src/mess/drivers/mx2178.c')
| -rw-r--r-- | src/mess/drivers/mx2178.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/src/mess/drivers/mx2178.c b/src/mess/drivers/mx2178.c new file mode 100644 index 00000000000..b6391e6cc16 --- /dev/null +++ b/src/mess/drivers/mx2178.c @@ -0,0 +1,184 @@ +/*************************************************************************** + + Skeleton driver for Memorex 2178 + + Chips: Z80A, N8X305N, 2x B8452A, 4x D4016C-3, 2x HD468A50P, HD46505SP-1 + Crystal: 18.8696MHz + There is a large piezo-beeper. + + TODO: + - Everything - this is just a skeleton + + +****************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "video/mc6845.h" +#include "machine/keyboard.h" + + +class mx2178_state : public driver_device +{ +public: + mx2178_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") + { } + + DECLARE_READ8_MEMBER(keyin_r); + DECLARE_WRITE8_MEMBER(kbd_put); + const UINT8 *m_p_chargen; + required_shared_ptr<UINT8> m_p_videoram; +private: + UINT8 m_term_data; + virtual void machine_reset(); + required_device<z80_device> m_maincpu; +}; + +static ADDRESS_MAP_START(mx2178_mem, AS_PROGRAM, 8, mx2178_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE(0x0000, 0x1fff) AM_ROM AM_REGION("roms", 0) + AM_RANGE(0x2000, 0x27ff) AM_RAM AM_SHARE("videoram") + AM_RANGE(0x6000, 0x6fff) AM_RAM + AM_RANGE(0xe000, 0xe7ff) AM_RAM +ADDRESS_MAP_END + +static ADDRESS_MAP_START(mx2178_io, AS_IO, 8, mx2178_state) + ADDRESS_MAP_GLOBAL_MASK(0xff) + AM_RANGE(0x00, 0x00) AM_DEVWRITE("crtc", mc6845_device, address_w) + AM_RANGE(0x01, 0x01) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) + AM_RANGE(0xa0, 0xa1) AM_READ(keyin_r) +ADDRESS_MAP_END + + +/* Input ports */ +static INPUT_PORTS_START( mx2178 ) +INPUT_PORTS_END + +READ8_MEMBER( mx2178_state::keyin_r ) +{ + if (offset) + { + UINT8 ret = m_term_data; + m_term_data = 0; + return ret; + } + else + return (m_term_data) ? 1 : 0; +} + +WRITE8_MEMBER( mx2178_state::kbd_put ) +{ + m_term_data = data; +} + +static ASCII_KEYBOARD_INTERFACE( keyboard_intf ) +{ + DEVCB_DRIVER_MEMBER(mx2178_state, kbd_put) +}; + +static MC6845_UPDATE_ROW( update_row ) +{ + mx2178_state *state = device->machine().driver_data<mx2178_state>(); + const rgb_t *pens = palette_entry_list_raw(bitmap.palette()); + UINT8 chr,gfx,fg=1,inv; + UINT16 mem,x; + UINT32 *p = &bitmap.pix32(y); + + for (x = 0; x < x_count; x++) + { + inv = (x == cursor_x) ? 0xff : 0; + mem = (ma + x) & 0x7ff; + chr = state->m_p_videoram[mem]; + + /* get pattern of pixels for that character scanline */ + gfx = state->m_p_chargen[(chr<<4) | ra] ^ inv; + + /* Display a scanline of a character (8 pixels) */ + *p++ = pens[BIT(gfx, 7) ? fg : 0]; + *p++ = pens[BIT(gfx, 6) ? fg : 0]; + *p++ = pens[BIT(gfx, 5) ? fg : 0]; + *p++ = pens[BIT(gfx, 4) ? fg : 0]; + *p++ = pens[BIT(gfx, 3) ? fg : 0]; + *p++ = pens[BIT(gfx, 2) ? fg : 0]; + *p++ = pens[BIT(gfx, 1) ? fg : 0]; + *p++ = pens[BIT(gfx, 0) ? fg : 0]; + } +} + +static MC6845_INTERFACE( crtc_interface ) +{ + false, + 0,0,0,0, + 8, + NULL, + update_row, + NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + NULL +}; + +/* F4 Character Displayer */ +static const gfx_layout mx2178_charlayout = +{ + 8, 16, /* 8 x 16 characters */ + 256, /* 256 characters */ + 1, /* 1 bits per pixel */ + { 0 }, /* no bitplanes */ + /* x offsets */ + { 0, 1, 2, 3, 4, 5, 6, 7 }, + /* y offsets */ + { 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8 }, + 8*16 /* every char takes 8 bytes */ +}; + +static GFXDECODE_START( mx2178 ) + GFXDECODE_ENTRY( "chargen", 0x0000, mx2178_charlayout, 0, 1 ) +GFXDECODE_END + +void mx2178_state::machine_reset() +{ + m_p_chargen = memregion("chargen")->base(); +} + +static MACHINE_CONFIG_START( mx2178, mx2178_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu", Z80, 18869600/5) // guess + MCFG_CPU_PROGRAM_MAP(mx2178_mem) + MCFG_CPU_IO_MAP(mx2178_io) + //MCFG_CPU_VBLANK_INT_DRIVER("screen", mx2178_state, irq0_line_hold) + + /* video hardware */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_REFRESH_RATE(60) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) // not correct + MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update) + MCFG_SCREEN_SIZE(32*8, 32*8) + MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 2*8, 30*8-1) + MCFG_GFXDECODE(mx2178) + MCFG_PALETTE_LENGTH(2) + MCFG_PALETTE_INIT_OVERRIDE(driver_device, black_and_white) + + /* Devices */ + MCFG_MC6845_ADD("crtc", MC6845, "screen", 18869600 / 8, crtc_interface) // clk unknown + MCFG_ASCII_KEYBOARD_ADD(KEYBOARD_TAG, keyboard_intf) +MACHINE_CONFIG_END + +/* ROM definition */ +ROM_START( mx2178 ) + ROM_REGION(0x2000, "roms", 0) + ROM_LOAD( "96274139.bin", 0x000000, 0x002000, CRC(eb471a27) SHA1(433abefd1a72653d0bf35bcaaeccf9943b96260b) ) + + ROM_REGION(0x1000, "chargen", 0) + ROM_LOAD( "96273883.bin", 0x000000, 0x001000, CRC(8311fadd) SHA1(573bbad23e893ad9374edc929642dc1cba3452d2) ) +ROM_END + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS */ +COMP( 19??, mx2178, 0, 0, mx2178, mx2178, driver_device, 0, "Memorex", "Memorex 2178", GAME_IS_SKELETON ) |
