// license:MAME
// 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", GAME_NOT_WORKING | GAME_NO_SOUND)