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-rw-r--r--src/mame/drivers/univac.c214
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diff --git a/src/mame/drivers/univac.c b/src/mame/drivers/univac.c
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+++ b/src/mame/drivers/univac.c
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+// 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)