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Diffstat (limited to 'src/mame/drivers/univac.c')
-rw-r--r-- | src/mame/drivers/univac.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/src/mame/drivers/univac.c b/src/mame/drivers/univac.c new file mode 100644 index 00000000000..d26216c3bc5 --- /dev/null +++ b/src/mame/drivers/univac.c @@ -0,0 +1,214 @@ +// license:BSD-3-Clause +// copyright-holders:Robbbert +/*************************************************************************** + + Univac Terminals + + The terminals are models UTS20, UTS30, UTS40, UTS50 and SVT1120, + however only the UTS20 is dumped (program roms only). + + 25/05/2009 Skeleton driver + + The terminal has 2 screens selectable by the operator with the Fn + 1-2 + buttons. Thus the user can have two sessions open at once, to different + mainframes or applications. + + Sound is a beeper. + + This driver is all guesswork; Unisys never released technical info + to customers. All parts on the PCBs have internal Unisys part numbers + instead of the manufacturer's numbers. + +****************************************************************************/ + +#include "emu.h" +#include "cpu/z80/z80.h" +#include "cpu/z80/z80daisy.h" +#include "machine/nvram.h" +#include "machine/z80ctc.h" +#include "machine/z80dart.h" + + +class univac_state : public driver_device +{ +public: + univac_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_nvram(*this, "nvram") + , m_ctc(*this, "ctc") + , m_dart(*this, "dart") + { } + + DECLARE_READ8_MEMBER(vram_r); + DECLARE_WRITE8_MEMBER(vram_w); + DECLARE_WRITE8_MEMBER(port43_w); + INTERRUPT_GEN_MEMBER(vblank_irq); + UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); +private: + const UINT8 *m_p_chargen; + bool m_screen_num; + UINT8 m_framecnt; + virtual void machine_start(); + virtual void machine_reset(); + required_device<cpu_device> m_maincpu; + required_shared_ptr<UINT8> m_p_videoram; + required_device<nvram_device> m_nvram; + required_device<z80ctc_device> m_ctc; + required_device<z80dart_device> m_dart; +}; + + + +WRITE8_MEMBER( univac_state::port43_w ) +{ + m_screen_num = BIT(data, 0); +} + +READ8_MEMBER( univac_state::vram_r ) +{ + offs_t offs = (offset & 0x1fff) ^ (BIT(offset, 13) ? 0x2000 : 0) ^ (m_screen_num ? 0x2000 : 0); + return m_p_videoram[offs]; +} + +WRITE8_MEMBER( univac_state::vram_w ) +{ + offs_t offs = (offset & 0x1fff) ^ (BIT(offset, 13) ? 0x2000 : 0) ^ (m_screen_num ? 0x2000 : 0); + m_p_videoram[offs] = data; +} + + +static ADDRESS_MAP_START(uts20_mem, AS_PROGRAM, 8, univac_state) + ADDRESS_MAP_UNMAP_HIGH + AM_RANGE( 0x0000, 0x4fff ) AM_ROM AM_REGION("roms", 0) + AM_RANGE( 0x8000, 0xbfff ) AM_READWRITE(vram_r,vram_w) + AM_RANGE( 0xc000, 0xffff ) AM_RAM AM_SHARE("videoram") +ADDRESS_MAP_END + +static ADDRESS_MAP_START( uts20_io, AS_IO, 8, univac_state) + ADDRESS_MAP_GLOBAL_MASK(0xff) + ADDRESS_MAP_UNMAP_HIGH + //AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("dart", z80dart_device, ba_cd_r, ba_cd_w) + AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("dart", z80dart_device, cd_ba_r, cd_ba_w) // ?? no idea + AM_RANGE(0x20, 0x23) AM_DEVREADWRITE("ctc", z80ctc_device, read, write) + AM_RANGE(0x43, 0x43) AM_WRITE(port43_w) + AM_RANGE(0x80, 0xbf) AM_RAM AM_SHARE("nvram") +ADDRESS_MAP_END + +/* Input ports */ +static INPUT_PORTS_START( uts20 ) +INPUT_PORTS_END + + +void univac_state::machine_start() +{ +// D7DC and D7DD are checked for valid RID and SID (usually 21 and 51) if not valid then NVRAM gets initialised. +} + +void univac_state::machine_reset() +{ + m_screen_num = 0; + m_p_chargen = memregion("chargen")->base(); +} + +UINT32 univac_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) +{ + // this is used to get the ctc to pass the test + bool state = BIT(m_framecnt,0); + m_ctc->trg0(state); + m_ctc->trg1(state); + m_ctc->trg2(state); + m_ctc->trg3(state); + + UINT8 y,ra,chr,gfx; + UINT16 sy=0,ma=0,x; + UINT8 *videoram = m_p_videoram;//+(m_screen_num ? 0x2000 : 0); + + m_framecnt++; + + for (y = 0; y < 25; y++) + { + for (ra = 0; ra < 10; ra++) + { + UINT16 *p = &bitmap.pix16(sy++); + + for (x = ma; x < ma + 80; x++) + { + chr = videoram[x]; + + /* Take care of 'corner' characters */ + if (((chr == 0x1c) || (chr == 0x1d)) && (m_framecnt & 16)) + chr = 0x20; + + gfx = (ra ? m_p_chargen[((chr & 0x7f)<<4) | (ra-1) ] : 0) ^ (BIT(chr, 7) ? 0xff : 0); + + /* 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; +} + +static const z80_daisy_config daisy_chain[] = +{ + { "dart" }, + { "ctc" }, + { NULL } +}; + +static MACHINE_CONFIG_START( uts20, univac_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz) // unknown clock + MCFG_CPU_PROGRAM_MAP(uts20_mem) + MCFG_CPU_IO_MAP(uts20_io) + MCFG_CPU_CONFIG(daisy_chain) + + /* video hardware */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_REFRESH_RATE(50) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ + MCFG_SCREEN_UPDATE_DRIVER(univac_state, screen_update) + MCFG_SCREEN_SIZE(640, 250) + MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 249) + MCFG_SCREEN_PALETTE("palette") + MCFG_PALETTE_ADD_MONOCHROME_GREEN("palette") + + MCFG_NVRAM_ADD_1FILL("nvram") + MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL_4MHz) + MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) + MCFG_Z80DART_ADD("dart", XTAL_4MHz, 0, 0, 0, 0 ) + MCFG_Z80DART_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0)) +MACHINE_CONFIG_END + + +/* ROM definition */ +ROM_START( uts20 ) + ROM_REGION( 0x5000, "roms", ROMREGION_ERASEFF ) + ROM_LOAD( "uts20a.rom", 0x0000, 0x1000, CRC(1a7b4b4e) SHA1(c3732e25b4b7c7a80172e3fe55c77b923cf511eb) ) + ROM_LOAD( "uts20b.rom", 0x1000, 0x1000, CRC(7f8de87b) SHA1(a85f404ad9d560df831cc3e651a4b45e4ed30130) ) + ROM_LOAD( "uts20c.rom", 0x2000, 0x1000, CRC(4e334705) SHA1(ff1a730551b42f29d20af8ecc4495fd30567d35b) ) + ROM_LOAD( "uts20d.rom", 0x3000, 0x1000, CRC(76757cf7) SHA1(b0509d9a35366b21955f83ec3685163844c4dbf1) ) + ROM_LOAD( "uts20e.rom", 0x4000, 0x1000, CRC(0dfc8062) SHA1(cd681020bfb4829d4cebaf1b5bf618e67b55bda3) ) + ROM_FILL(0x2bd,1,0xaf) // test 2 + ROM_FILL(0x3c1,2,0xaf) // test 5 + ROM_FILL(0x928,1,0) + + /* 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( 1980, uts20, 0, 0, uts20, uts20, driver_device, 0, "Sperry Univac", "UTS-20", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) |