// license:BSD-3-Clause // copyright-holders:AJR /*********************************************************************************************************************************** 2017-11-03 Skeleton Altos II terminal. Green screen. Chips: Z80A, 2x Z80DART, Z80CTC, X2210D, 2x CRT9006, CRT9007, CRT9021A, 8x 6116 Other: Beeper. Crystals: 4.9152, 8.000, 40.000 Keyboard: P8035L CPU, undumped 2716 labelled "358_2758", XTAL marked "4608-300-107 KSS4C" ************************************************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/z80daisy.h" #include "machine/z80ctc.h" #include "machine/z80dart.h" #include "machine/clock.h" #include "machine/x2212.h" //#include "video/crt9007.h" //#include "video/crt9021.h" #include "screen.h" class altos2_state : public driver_device { public: altos2_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_novram(*this, "novram") , m_p_chargen(*this, "chargen") , m_p_videoram(*this, "videoram") { } void altos2(machine_config &config); protected: DECLARE_WRITE8_MEMBER(video_mode_w); u32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); virtual void machine_reset() override; void io_map(address_map &map); void mem_map(address_map &map); private: required_device m_maincpu; required_device m_novram; required_region_ptr m_p_chargen; required_shared_ptr m_p_videoram; }; void altos2_state::machine_reset() { m_novram->recall(ASSERT_LINE); m_novram->recall(CLEAR_LINE); } WRITE8_MEMBER(altos2_state::video_mode_w) { // D5 = 1 for 132-column mode (6-pixel char width) // D5 = 0 for 80-column mode (10-pixel char width) logerror("Writing %02X to mode register at %s\n", data, machine().describe_context()); } u32 altos2_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { return 0; } void altos2_state::mem_map(address_map &map) { map(0x0000, 0x3fff).rom().region("roms", 0); map(0xc000, 0xffff).ram().share("videoram"); } void altos2_state::io_map(address_map &map) { map.global_mask(0xff); map.unmap_value_high(); map(0x00, 0x03).rw("dart1", FUNC(z80dart_device::ba_cd_r), FUNC(z80dart_device::ba_cd_w)); map(0x04, 0x07).rw("dart2", FUNC(z80dart_device::ba_cd_r), FUNC(z80dart_device::ba_cd_w)); map(0x08, 0x0b).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); map(0x0c, 0x0c).w(this, FUNC(altos2_state::video_mode_w)); map(0x40, 0x7f).rw(m_novram, FUNC(x2210_device::read), FUNC(x2210_device::write)); //AM_RANGE(0x80, 0xff) AM_DEVREADWRITE_MOD("vpac", crt9007_device, read, write, rshift<1>) } static INPUT_PORTS_START( altos2 ) INPUT_PORTS_END static const z80_daisy_config daisy_chain[] = { { "dart1" }, { "dart2" }, { "ctc" }, { nullptr } }; MACHINE_CONFIG_START(altos2_state::altos2) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu",Z80, XTAL(4'000'000)) // unknown clock MCFG_DEVICE_PROGRAM_MAP(mem_map) MCFG_DEVICE_IO_MAP(io_map) MCFG_Z80_DAISY_CHAIN(daisy_chain) MCFG_DEVICE_ADD("ctc_clock", CLOCK, 4915200) // ctc & dart connections are guesswork MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE("ctc", z80ctc_device, trg0)) MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("ctc", z80ctc_device, trg1)) MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("ctc", z80ctc_device, trg2)) MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL(4'000'000)) MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80CTC_ZC0_CB(WRITELINE("dart1", z80dart_device, txca_w)) MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("dart1", z80dart_device, rxca_w)) MCFG_Z80CTC_ZC1_CB(WRITELINE("dart1", z80dart_device, rxtxcb_w)) MCFG_Z80CTC_ZC2_CB(WRITELINE("dart2", z80dart_device, rxca_w)) MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("dart2", z80dart_device, txca_w)) MCFG_DEVICE_ADD("dart1", Z80DART, XTAL(4'000'000)) MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_DEVICE_ADD("dart2", Z80DART, XTAL(4'000'000)) // channel B not used for communications MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) MCFG_Z80DART_OUT_DTRB_CB(WRITELINE("novram", x2210_device, store)) MCFG_DEVCB_INVERT // FIXME: no inverter should be needed MCFG_DEVICE_ADD("novram", X2210, 0) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_RAW_PARAMS(XTAL(40'000'000) / 2, 960, 0, 800, 347, 0, 325) MCFG_SCREEN_UPDATE_DRIVER(altos2_state, screen_update) //MCFG_DEVICE_ADD("vpac", CRT9007, VPAC_CLOCK) //MCFG_CRT9007_INT_CALLBACK(WRITELINE("ctc", z80ctc_device, trg3)) //MCFG_VIDEO_SET_SCREEN("screen") MACHINE_CONFIG_END ROM_START( altos2 ) ROM_REGION( 0x4000, "roms", 0 ) ROM_LOAD( "us_v1.2_15732.u32", 0x0000, 0x2000, CRC(a85f7be0) SHA1(3cfa954c916258d86f7f745d10ec2ff5e33261b3) ) ROM_LOAD( "us_v1.2_15733.u19", 0x2000, 0x2000, CRC(45ebe88a) SHA1(33f16b382a2b365122ebf5e5f7312f8afa45ad15) ) ROM_REGION( 0x2000, "chargen", 0 ) ROM_LOAD( "us_v1.1_14410.u34", 0x0000, 0x2000, CRC(0ebb78bf) SHA1(96a1f7d34ff35037cbbc93049c0e2b9c9f11f1db) ) ROM_END COMP( 1983, altos2, 0, 0, altos2, altos2, altos2_state, empty_init, "Altos", "Altos II Terminal", MACHINE_IS_SKELETON )