// 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" #include "machine/z80ctc.h" #include "machine/z80sio.h" #include "machine/clock.h" #include "bus/rs232/rs232.h" #include "screen.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, "videoram") , m_p_attributes(*this, "attributes") , m_maincpu(*this, "maincpu") , m_p_chargen(*this, "chargen") , m_uart(*this, "uart") { } uint32_t screen_update_m79152pc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); void m79152pc(machine_config &config); void io_map(address_map &map); void mem_map(address_map &map); private: virtual void machine_reset() override; required_shared_ptr m_p_videoram; required_shared_ptr m_p_attributes; required_device m_maincpu; required_region_ptr m_p_chargen; required_device m_uart; }; void m79152pc_state::mem_map(address_map &map) { map.unmap_value_high(); map(0x0000, 0x3fff).rom(); map(0x4000, 0x47ff).ram(); map(0x8000, 0x8fff).ram().share("videoram"); map(0x9000, 0x9fff).ram().share("attributes"); } void m79152pc_state::io_map(address_map &map) { //ADDRESS_MAP_UNMAP_HIGH map.global_mask(0xff); map(0x40, 0x43).rw(m_uart, FUNC(z80sio_device::cd_ba_r), FUNC(z80sio_device::cd_ba_w)); map(0x44, 0x47).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); } /* Input ports */ static INPUT_PORTS_START( m79152pc ) INPUT_PORTS_END void m79152pc_state::machine_reset() { m_uart->ctsb_w(1); // this is checked before writing to port 47. } uint32_t m79152pc_state::screen_update_m79152pc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { // Attributes are unknown so are not implemented uint8_t y,ra,chr,gfx; //,attr; uint16_t sy=0,ma=0,x; for (y = 0; y < 25; y++) { for (ra = 0; ra < 12; ra++) { uint16_t *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) + 4 ]; /* 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( gfx_m79152pc ) GFXDECODE_ENTRY( "chargen", 0x0000, m79152pc_charlayout, 0, 1 ) GFXDECODE_END MACHINE_CONFIG_START(m79152pc_state::m79152pc) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu",Z80, XTAL(4'000'000)) MCFG_DEVICE_PROGRAM_MAP(mem_map) MCFG_DEVICE_IO_MAP(io_map) /* 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_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_m79152pc) MCFG_PALETTE_ADD_MONOCHROME("palette") MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600) MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE("uart", z80sio_device, txca_w)) MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("uart", z80sio_device, rxca_w)) MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL(4'000'000)) //MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_DEVICE_ADD("uart", Z80SIO, XTAL(4'000'000)) //MCFG_Z80SIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80SIO_OUT_TXDA_CB(WRITELINE("rs232", rs232_port_device, write_txd)) MCFG_Z80SIO_OUT_DTRA_CB(WRITELINE("rs232", rs232_port_device, write_dtr)) MCFG_Z80SIO_OUT_RTSA_CB(WRITELINE("rs232", rs232_port_device, write_rts)) //MCFG_Z80SIO_OUT_TXDB_CB(WRITELINE("rs232a", rs232_port_device, write_txd)) //MCFG_Z80SIO_OUT_DTRB_CB(WRITELINE("rs232a", rs232_port_device, write_dtr)) //MCFG_Z80SIO_OUT_RTSB_CB(WRITELINE("rs232a", rs232_port_device, write_rts)) MCFG_DEVICE_ADD("rs232", RS232_PORT, default_rs232_devices, "keyboard") MCFG_RS232_RXD_HANDLER(WRITELINE("uart", z80sio_device, rxa_w)) MCFG_RS232_CTS_HANDLER(WRITELINE("uart", z80sio_device, ctsa_w)) //MCFG_DEVICE_ADD("rs232a", RS232_PORT, default_rs232_devices, "terminal") //MCFG_RS232_RXD_HANDLER(WRITELINE("uart", z80sio_device, rxb_w)) //MCFG_RS232_CTS_HANDLER(WRITELINE("uart", z80sio_device, ctsb_w)) 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 CLASS INIT COMPANY FULLNAME FLAGS COMP( ????, m79152pc, 0, 0, m79152pc, m79152pc, m79152pc_state, empty_init, "Mera-Elzab", "MERA 79152 PC", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)