// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic, Robbbert /*************************************************************************** Robotron K8915 2010-08-30 When it says DIAGNOSTIC RAZ P, press enter. ****************************************************************************/ #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 k8915_state : public driver_device { public: k8915_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_p_videoram(*this, "videoram") , m_p_chargen(*this, "chargen") { } DECLARE_WRITE8_MEMBER(k8915_a8_w); void init_k8915(); uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); void k8915(machine_config &config); void io_map(address_map &map); void mem_map(address_map &map); private: uint8_t m_framecnt; virtual void machine_reset() override; required_device m_maincpu; required_shared_ptr m_p_videoram; required_region_ptr m_p_chargen; }; WRITE8_MEMBER( k8915_state::k8915_a8_w ) { // seems to switch ram and rom around. if (data == 0x87) membank("boot")->set_entry(0); // ram at 0000 else membank("boot")->set_entry(1); // rom at 0000 } void k8915_state::mem_map(address_map &map) { map.unmap_value_high(); map(0x0000, 0x0fff).bankrw("boot"); map(0x1000, 0x17ff).ram().share("videoram"); map(0x1800, 0xffff).ram(); } void k8915_state::io_map(address_map &map) { map.global_mask(0xff); map(0x50, 0x53).rw("sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); map(0x58, 0x5b).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); map(0xa8, 0xa8).w(this, FUNC(k8915_state::k8915_a8_w)); } /* Input ports */ static INPUT_PORTS_START( k8915 ) INPUT_PORTS_END void k8915_state::machine_reset() { membank("boot")->set_entry(1); } void k8915_state::init_k8915() { uint8_t *RAM = memregion("maincpu")->base(); membank("boot")->configure_entries(0, 2, &RAM[0x0000], 0x10000); } uint32_t k8915_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { uint8_t y,ra,chr,gfx; uint16_t sy=0,ma=0,x; m_framecnt++; for (y = 0; y < 25; y++) { for (ra = 0; ra < 10; ra++) { uint16_t *p = &bitmap.pix16(sy++); for (x = ma; x < ma + 80; x++) { gfx = 0; if (ra < 9) { chr = m_p_videoram[x]; /* Take care of flashing characters */ if ((chr & 0x80) && (m_framecnt & 0x08)) chr = 0x20; chr &= 0x7f; 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; } MACHINE_CONFIG_START(k8915_state::k8915) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu", Z80, XTAL(4'915'200) / 2) MCFG_DEVICE_PROGRAM_MAP(mem_map) MCFG_DEVICE_IO_MAP(io_map) /* video hardware */ MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green()) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_UPDATE_DRIVER(k8915_state, screen_update) MCFG_SCREEN_SIZE(640, 250) MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 249) MCFG_SCREEN_PALETTE("palette") MCFG_PALETTE_ADD_MONOCHROME("palette") MCFG_DEVICE_ADD("ctc_clock", CLOCK, XTAL(4'915'200) / 2) MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE("ctc", z80ctc_device, trg2)) MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL(4'915'200) / 2) MCFG_Z80CTC_ZC2_CB(WRITELINE("sio", z80sio_device, rxtxcb_w)) MCFG_DEVICE_ADD("sio", Z80SIO, XTAL(4'915'200) / 2) MCFG_Z80SIO_OUT_TXDB_CB(WRITELINE("rs232", rs232_port_device, write_txd)) MCFG_Z80SIO_OUT_DTRB_CB(WRITELINE("rs232", rs232_port_device, write_dtr)) MCFG_Z80SIO_OUT_RTSB_CB(WRITELINE("rs232", rs232_port_device, write_rts)) MCFG_DEVICE_ADD("rs232", RS232_PORT, default_rs232_devices, "keyboard") MCFG_RS232_RXD_HANDLER(WRITELINE("sio", z80sio_device, rxb_w)) MCFG_RS232_DCD_HANDLER(WRITELINE("sio", z80sio_device, dcdb_w)) MCFG_RS232_CTS_HANDLER(WRITELINE("sio", z80sio_device, ctsb_w)) MACHINE_CONFIG_END /* ROM definition */ ROM_START( k8915 ) ROM_REGION( 0x11000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "k8915.bin", 0x10000, 0x1000, CRC(ca70385f) SHA1(a34c14adae9be821678aed7f9e33932ee1f3e61c)) /* character generator not dumped, using the one from 'c10' for now */ ROM_REGION( 0x2000, "chargen", 0 ) ROM_LOAD( "c10_char.bin", 0x0000, 0x2000, BAD_DUMP CRC(cb530b6f) SHA1(95590bbb433db9c4317f535723b29516b9b9fcbf)) ROM_END /* Driver */ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1982, k8915, 0, 0, k8915, k8915, k8915_state, init_k8915, "Robotron", "K8915", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)