124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/***************************************************************************
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DEC VT320
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30/06/2009 Skeleton driver.
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****************************************************************************/
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#include "emu.h"
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#include "cpu/mcs51/mcs51.h"
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#include "machine/ram.h"
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class vt320_state : public driver_device
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{
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public:
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vt320_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag) ,
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m_maincpu(*this, "maincpu"),
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m_ram(*this, RAM_TAG) { }
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virtual void machine_reset();
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virtual void video_start();
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UINT32 screen_update_vt320(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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required_device<cpu_device> m_maincpu;
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required_device<ram_device> m_ram;
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};
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/*
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Partlist :
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Siemens SAB8031A-16-P
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ROMless version of the 8051 microcontroller, running at 16 MHz.
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Motorola MC2681P
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Dual Universal Asynchronous Receiver/Transmitter (DUART), 40-pin package.
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Toshiba TC53512AP
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ROM, 512K bits = 64K bytes. 28-pin package.
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Toshiba TC5565APL-12, 2 off
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Static RAM, 64K bit = 8K byte.
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ST TDA1170N
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Vertical deflection system IC.
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UC 80343Q
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20 pins. Unknown.
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UC 80068Q
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20 pins. Unknown.
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Motorola SN74LS157NQST
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16 pins. Quad 2-to-1 multiplexer.
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Microchip ER5911
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8 pins. Serial EEPROM. 1K bits = 128 bytes.
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Texas Inst. 749X 75146
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8 pins. Unknown.
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Signetics? 74LS373N
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8-bit D-type latch. This has eight inputs and eight outputs.
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*/
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static ADDRESS_MAP_START(vt320_mem, AS_PROGRAM, 8, vt320_state)
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AM_RANGE(0x0000, 0xffff) AM_ROM
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(vt320_io, AS_IO, 8, vt320_state)
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ADDRESS_MAP_END
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/* Input ports */
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static INPUT_PORTS_START( vt320 )
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INPUT_PORTS_END
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void vt320_state::machine_reset()
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{
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memset(m_ram->pointer(),0,16*1024);
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}
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void vt320_state::video_start()
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{
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}
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UINT32 vt320_state::screen_update_vt320(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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return 0;
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}
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static MACHINE_CONFIG_START( vt320, vt320_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu", I8051, XTAL_16MHz)
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MCFG_CPU_PROGRAM_MAP(vt320_mem)
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MCFG_CPU_IO_MAP(vt320_io)
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/* video hardware */
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MCFG_SCREEN_ADD("screen", RASTER)
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MCFG_SCREEN_REFRESH_RATE(50)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
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MCFG_SCREEN_SIZE(640, 480)
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MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
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MCFG_SCREEN_UPDATE_DRIVER(vt320_state, screen_update_vt320)
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MCFG_SCREEN_PALETTE("palette")
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MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
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/* internal ram */
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MCFG_RAM_ADD(RAM_TAG)
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MCFG_RAM_DEFAULT_SIZE("16K")
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MACHINE_CONFIG_END
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/* ROM definition */
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ROM_START( vt320 )
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ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
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ROM_DEFAULT_BIOS( "vt320" )
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//DOL: http://web.archive.org/web/20060905115711/http://cmcnabb.cc.vt.edu/dec94mds/vt320dol.txt
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ROM_SYSTEM_BIOS( 0, "vt320v11", "VT320 V1.1" )
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// 23-054E7 below can also appear (same contents?) as 23-048E7 which is a mask rom
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ROMX_LOAD( "23-054e7.e9", 0x0000, 0x10000, CRC(be98f9a4) SHA1(b8044d42ffaadb734fbd047fbca9c8aadeb0bf6c), ROM_BIOS(1)) // EPROM
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ROM_SYSTEM_BIOS( 1, "vt320", "VT320 V1.2" )
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ROMX_LOAD( "23-104e7.e9", 0x0000, 0x10000, CRC(5f419b5a) SHA1(dbc429b32d6baefd8a56862717d6e7fea1fb0c1c), ROM_BIOS(2))
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ROM_END
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/* Driver */
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/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
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COMP( 1987, vt320, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT320", GAME_NOT_WORKING | GAME_NO_SOUND)
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//COMP( 1989?, vt330, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT330", GAME_NOT_WORKING)
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//COMP( 1989?, vt340, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT340", GAME_NOT_WORKING)
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//COMP( 1990?, vt340p, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT340+", GAME_NOT_WORKING)
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