// license:BSD-3-Clause // copyright-holders:Robbbert /***************************************************************************************************** Cromemco C-10 Personal Computer 2010-08-30 Skeleton driver Photos show: Intersil 74954-1, Mostek MK3880N-4 (Z80A), CROMEMCO 011-0082-01, CROMEMCO 011-0095, Intel P8275-2, AM92128BPC (16K ROM), NEC D8257C-5, CROMEMCO 011-0083, WDC FD1793B-02, 2x 8251. Crystals: 8MHz, 13.028MHz Driver currently gets to a loop where it waits for an interrupt. The interrupt routine presumably writes to FE69 which the loop is constantly looking at. *****************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "screen.h" class c10_state : public driver_device { public: enum { TIMER_RESET }; c10_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") { } uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); void init_c10(); void c10(machine_config &config); void c10_io(address_map &map); void c10_mem(address_map &map); private: required_device m_maincpu; required_shared_ptr m_p_videoram; required_region_ptr m_p_chargen; virtual void machine_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; }; void c10_state::c10_mem(address_map &map) { map.unmap_value_high(); map(0x0000, 0x0fff).bankrw("boot"); map(0x1000, 0x7fff).ram(); map(0x8000, 0xbfff).rom(); map(0xc000, 0xf0a1).ram(); map(0xf0a2, 0xffff).ram().share("videoram"); } void c10_state::c10_io(address_map &map) { map.global_mask(0xff); } /* Input ports */ static INPUT_PORTS_START( c10 ) INPUT_PORTS_END void c10_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_RESET: /* after the first 4 bytes have been read from ROM, switch the ram back in */ membank("boot")->set_entry(0); break; default: assert_always(false, "Unknown id in c10_state::device_timer"); } } void c10_state::machine_reset() { membank("boot")->set_entry(1); timer_set(attotime::from_usec(4), TIMER_RESET); } /* This system appears to have inline attribute bytes of unknown meaning. Currently they are ignored. The word at FAB5 looks like it might be cursor location. */ uint32_t c10_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { //static uint8_t framecnt=0; uint8_t y,ra,chr,gfx; uint16_t sy=0,ma=0,x,xx; //framecnt++; for (y = 0; y < 25; y++) { for (ra = 0; ra < 10; ra++) { uint16_t *p = &bitmap.pix16(sy++); xx = ma; for (x = ma; x < ma + 80; x++) { gfx = 0; if (ra < 9) { chr = m_p_videoram[xx++]; // /* Take care of flashing characters */ // if ((chr < 0x80) && (framecnt & 0x08)) // chr |= 0x80; if (BIT(chr, 7)) // ignore attribute bytes x--; else 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+=96; } return 0; } /* F4 Character Displayer */ static const gfx_layout c10_charlayout = { 8, 9, /* 8 x 9 characters */ 512, /* 512 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 0, 1, 2, 3, 4, 5, 6, 7 }, /* y offsets */ { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8 }, 8*16 /* every char takes 16 bytes */ }; static GFXDECODE_START( gfx_c10 ) GFXDECODE_ENTRY( "chargen", 0x0000, c10_charlayout, 0, 1 ) GFXDECODE_END MACHINE_CONFIG_START(c10_state::c10) /* basic machine hardware */ MCFG_DEVICE_ADD("maincpu", Z80, XTAL(8'000'000) / 2) MCFG_DEVICE_PROGRAM_MAP(c10_mem) MCFG_DEVICE_IO_MAP(c10_io) /* video hardware */ MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_REFRESH_RATE(60) MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ MCFG_SCREEN_UPDATE_DRIVER(c10_state, screen_update) MCFG_SCREEN_SIZE(640, 250) MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 249) MCFG_SCREEN_PALETTE("palette") MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfx_c10) MCFG_PALETTE_ADD_MONOCHROME("palette") MACHINE_CONFIG_END void c10_state::init_c10() { uint8_t *RAM = memregion("maincpu")->base(); membank("boot")->configure_entries(0, 2, &RAM[0x0000], 0x8000); } /* ROM definition */ ROM_START( c10 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "502-0055.ic16", 0x8000, 0x4000, CRC(2ccf5983) SHA1(52f7c497f5284bf5df9eb0d6e9142bb1869d8c24)) ROM_REGION( 0x2000, "chargen", 0 ) ROM_LOAD( "c10_char.ic9", 0x0000, 0x2000, CRC(cb530b6f) SHA1(95590bbb433db9c4317f535723b29516b9b9fcbf)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1982, c10, 0, 0, c10, c10, c10_state, init_c10, "Cromemco", "C-10", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)