// license:BSD-3-Clause // copyright-holders: /*********************************************************************************************************************************** Skeleton driver for Relisys TR-175 II color terminal. ************************************************************************************************************************************/ #include "emu.h" #include "cpu/m68000/m68000.h" #include "machine/mc68681.h" #include "video/ramdac.h" #include "video/scn2674.h" #include "screen.h" class tr175_state : public driver_device { public: tr175_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") { } DECLARE_WRITE8_MEMBER(ffec01_w); DECLARE_WRITE8_MEMBER(fff000_w); DECLARE_READ8_MEMBER(fff400_r); SCN2674_DRAW_CHARACTER_MEMBER(draw_character); void tr175(machine_config &config); void mem_map(address_map &map); void ramdac_map(address_map &map); void vram_map(address_map &map); private: required_device m_maincpu; }; WRITE8_MEMBER(tr175_state::ffec01_w) { logerror("%s: Writing %02X to FFEC01\n", machine().describe_context(), data); } WRITE8_MEMBER(tr175_state::fff000_w) { logerror("%s: Writing %02X to FFF000\n", machine().describe_context(), data); } READ8_MEMBER(tr175_state::fff400_r) { return 0; } ADDRESS_MAP_START(tr175_state::mem_map) AM_RANGE(0x000000, 0x01ffff) AM_ROM AM_REGION("maincpu", 0) AM_RANGE(0xfe8000, 0xfebfff) AM_RAM // 8-bit? AM_RANGE(0xfefe00, 0xfefedd) AM_WRITENOP // 8-bit; cleared at startup AM_RANGE(0xff8000, 0xffbfff) AM_RAM // main RAM AM_RANGE(0xff0000, 0xff7fff) AM_RAM // video RAM? AM_RANGE(0xffe000, 0xffe01f) AM_DEVREADWRITE8("duart", scn2681_device, read, write, 0xff00) AM_RANGE(0xffe400, 0xffe40f) AM_DEVREADWRITE8("avdc", scn2674_device, read, write, 0xff00) AM_RANGE(0xffe800, 0xffe805) AM_UNMAP //AM_DEVREADWRITE8("pai", um82c11_device, read, write, 0xff00) AM_RANGE(0xffec00, 0xffec01) AM_WRITE8(ffec01_w, 0x00ff) AM_RANGE(0xfff000, 0xfff001) AM_WRITE8(fff000_w, 0xff00) AM_RANGE(0xfff400, 0xfff401) AM_READ8(fff400_r, 0xff00) AM_RANGE(0xfffc00, 0xfffc01) AM_DEVWRITE8("ramdac", ramdac_device, index_w, 0x00ff) AM_RANGE(0xfffc02, 0xfffc03) AM_DEVWRITE8("ramdac", ramdac_device, pal_w, 0x00ff) AM_RANGE(0xfffc04, 0xfffc05) AM_DEVWRITE8("ramdac", ramdac_device, mask_w, 0x00ff) ADDRESS_MAP_END SCN2674_DRAW_CHARACTER_MEMBER(tr175_state::draw_character) { } ADDRESS_MAP_START(tr175_state::vram_map) AM_RANGE(0x0000, 0x3fff) AM_READNOP ADDRESS_MAP_END ADDRESS_MAP_START(tr175_state::ramdac_map) AM_RANGE(0x000, 0x3ff) AM_DEVREADWRITE("ramdac", ramdac_device, ramdac_pal_r, ramdac_rgb666_w) ADDRESS_MAP_END static INPUT_PORTS_START( tr175 ) INPUT_PORTS_END MACHINE_CONFIG_START(tr175_state::tr175) MCFG_CPU_ADD("maincpu", M68000, 12'000'000) MCFG_CPU_PROGRAM_MAP(mem_map) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_RAW_PARAMS(XTAL(28'322'000), 900, 0, 720, 449, 0, 416) // guess MCFG_SCREEN_UPDATE_DEVICE("avdc", scn2674_device, screen_update) MCFG_DEVICE_ADD("avdc", SCN2674, XTAL(28'322'000) / 18) // guess MCFG_SCN2674_INTR_CALLBACK(INPUTLINE("maincpu", M68K_IRQ_2)) MCFG_SCN2674_CHARACTER_WIDTH(18) // guess MCFG_SCN2674_DRAW_CHARACTER_CALLBACK_OWNER(tr175_state, draw_character) MCFG_DEVICE_ADDRESS_MAP(0, vram_map) MCFG_VIDEO_SET_SCREEN("screen") MCFG_DEVICE_ADD("duart", SCN2681, XTAL(11'059'200) / 3) // is this the right clock? MCFG_MC68681_IRQ_CALLBACK(INPUTLINE("maincpu", M68K_IRQ_1)) MCFG_PALETTE_ADD("palette", 0x100) MCFG_RAMDAC_ADD("ramdac", ramdac_map, "palette") MACHINE_CONFIG_END /************************************************************************************************************** Relisys TR-175 II. Chips: MC68000P12, HM82C11C, SCN2681, 3x W24257-70L, KDA0476BCN-66 (RAMDAC), 4 undumped proms, Beeper, Button battery Crystals: 28.322, 46.448, 11.0592, unknown. Colour screen (VGA). ***************************************************************************************************************/ ROM_START( tr175 ) ROM_REGION(0x20000, "maincpu", 0) ROM_LOAD16_BYTE( "v6.05.u50", 0x00001, 0x10000, CRC(5a33b6b3) SHA1(d673f50dd88f8a154ddaabe34cfcc9ab91435a4c) ) ROM_LOAD16_BYTE( "v6.05.u45", 0x00000, 0x10000, CRC(e220befe) SHA1(8402280577e6de4b85843222bbd6b06a3f625b3b) ) ROM_END COMP( 1982, tr175, 0, 0, tr175, tr175, tr175_state, 0, "Relisys", "TR-175 II", MACHINE_IS_SKELETON )