// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic /*************************************************************************** Mera-Elzab 79152pc This is terminal 29/12/2011 Skeleton driver. ****************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" class m79152pc_state : public driver_device { public: m79152pc_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_p_videoram(*this, "p_videoram"), m_p_attributes(*this, "p_attributes"), m_maincpu(*this, "maincpu") { } UINT8 *m_p_chargen; required_shared_ptr m_p_videoram; required_shared_ptr m_p_attributes; virtual void machine_reset() override; virtual void video_start() override; UINT32 screen_update_m79152pc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); required_device m_maincpu; }; static ADDRESS_MAP_START(m79152pc_mem, AS_PROGRAM, 8, m79152pc_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x3fff) AM_ROM AM_RANGE(0x4000, 0x47ff) AM_RAM AM_RANGE(0x8000, 0x8fff) AM_RAM AM_SHARE("p_videoram") AM_RANGE(0x9000, 0x9fff) AM_RAM AM_SHARE("p_attributes") ADDRESS_MAP_END static ADDRESS_MAP_START( m79152pc_io, AS_IO, 8, m79152pc_state) //ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0xff) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( m79152pc ) INPUT_PORTS_END void m79152pc_state::machine_reset() { } void m79152pc_state::video_start() { m_p_chargen = memregion("chargen")->base()+4; } UINT32 m79152pc_state::screen_update_m79152pc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // Attributes are unknown so are not implemented UINT8 y,ra,chr,gfx; //,attr; UINT16 sy=0,ma=0,x; for (y = 0; y < 25; y++) { for (ra = 0; ra < 12; ra++) { UINT16 *p = &bitmap.pix16(sy++); for (x = ma; x < ma + 80; x++) { chr = m_p_videoram[x]; //attr = m_p_attributes[x]; gfx = m_p_chargen[(chr<<4) | ra ]; /* Display a scanline of a character */ *p++ = BIT(gfx, 7); *p++ = BIT(gfx, 6); *p++ = BIT(gfx, 5); *p++ = BIT(gfx, 4); *p++ = BIT(gfx, 3); *p++ = BIT(gfx, 2); *p++ = BIT(gfx, 1); *p++ = BIT(gfx, 0); } } ma+=80; } return 0; } /* F4 Character Displayer */ static const gfx_layout m79152pc_charlayout = { 8, 12, /* 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 */ { 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( m79152pc ) GFXDECODE_ENTRY( "chargen", 0x0000, m79152pc_charlayout, 0, 1 ) GFXDECODE_END static MACHINE_CONFIG_START( m79152pc, m79152pc_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz) MCFG_CPU_PROGRAM_MAP(m79152pc_mem) MCFG_CPU_IO_MAP(m79152pc_io) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(50) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_SIZE(640, 300) MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 300-1) MCFG_SCREEN_UPDATE_DRIVER(m79152pc_state, screen_update_m79152pc) MCFG_SCREEN_PALETTE("palette") MCFG_GFXDECODE_ADD("gfxdecode", "palette", m79152pc) MCFG_PALETTE_ADD_MONOCHROME("palette") MACHINE_CONFIG_END /* ROM definition */ ROM_START( m79152pc ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "left.bin", 0x0000, 0x4000, CRC(8cd677fc) SHA1(7ad28f3ba984383f24a36639ca27fc1eb5a5d002)) ROM_REGION( 0x1800, "chargen", ROMREGION_INVERT ) ROM_LOAD( "right.bin", 0x0000, 0x1000, CRC(93f83fdc) SHA1(e8121b3d175c46c02828f43ec071a7d9c62e7c26)) // chargen ROM_LOAD( "char.bin", 0x1000, 0x0800, CRC(da3792a5) SHA1(b4a4f0d61d8082b7909a346a5b01494c53cf8d05)) // unknown ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( ????, m79152pc, 0, 0, m79152pc, m79152pc, driver_device, 0, "Mera-Elzab", "MERA 79152 PC", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)