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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic, Jonathan Gevaryahu
/***************************************************************************
DEC VT320
30/06/2009 Skeleton driver.
****************************************************************************/
#include "emu.h"
#include "cpu/mcs51/mcs51.h"
#include "machine/ram.h"
class vt320_state : public driver_device
{
public:
vt320_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) ,
m_maincpu(*this, "maincpu"),
m_ram(*this, RAM_TAG) { }
virtual void machine_reset();
virtual void video_start();
UINT32 screen_update_vt320(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
required_device<cpu_device> m_maincpu;
required_device<ram_device> m_ram;
};
/*
Partlist :
Siemens SAB8031A-16-P
ROMless version of the 8051 microcontroller, running at 16 MHz.
Motorola MC2681P
Dual Universal Asynchronous Receiver/Transmitter (DUART), 40-pin package.
Toshiba TC53512AP
ROM, 512K bits = 64K bytes. 28-pin package.
Toshiba TC5565APL-12, 2 off
Static RAM, 64K bit = 8K byte.
ST TDA1170N
Vertical deflection system IC.
UC 80343Q
20 pins. Unknown.
UC 80068Q
20 pins. Unknown.
Motorola SN74LS157NQST
16 pins. Quad 2-to-1 multiplexer.
Microchip ER5911
8 pins. Serial EEPROM. 1K bits = 128 bytes.
Texas Inst. 749X 75146
8 pins. Unknown.
Signetics? 74LS373N
8-bit D-type latch. This has eight inputs and eight outputs.
*/
static ADDRESS_MAP_START(vt320_mem, AS_PROGRAM, 8, vt320_state)
AM_RANGE(0x0000, 0xffff) AM_ROM
ADDRESS_MAP_END
static ADDRESS_MAP_START(vt320_io, AS_IO, 8, vt320_state)
ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( vt320 )
INPUT_PORTS_END
void vt320_state::machine_reset()
{
memset(m_ram->pointer(),0,16*1024);
}
void vt320_state::video_start()
{
}
UINT32 vt320_state::screen_update_vt320(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
return 0;
}
static MACHINE_CONFIG_START( vt320, vt320_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8051, XTAL_16MHz)
MCFG_CPU_PROGRAM_MAP(vt320_mem)
MCFG_CPU_IO_MAP(vt320_io)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
MCFG_SCREEN_REFRESH_RATE(50)
MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(640, 480)
MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1)
MCFG_SCREEN_UPDATE_DRIVER(vt320_state, screen_update_vt320)
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
/* internal ram */
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("16K")
MACHINE_CONFIG_END
/* ROM definition */
ROM_START( vt320 )
ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
ROM_DEFAULT_BIOS( "vt320" )
//DOL: http://web.archive.org/web/20060905115711/http://cmcnabb.cc.vt.edu/dec94mds/vt320dol.txt
ROM_SYSTEM_BIOS( 0, "vt320v11", "VT320 V1.1" )
// 23-054E7 below can also appear (same contents?) as 23-048E7 which is a mask rom
ROMX_LOAD( "23-054e7.e9", 0x0000, 0x10000, CRC(be98f9a4) SHA1(b8044d42ffaadb734fbd047fbca9c8aadeb0bf6c), ROM_BIOS(1)) // EPROM
ROM_SYSTEM_BIOS( 1, "vt320", "VT320 V1.2" )
ROMX_LOAD( "23-104e7.e9", 0x0000, 0x10000, CRC(5f419b5a) SHA1(dbc429b32d6baefd8a56862717d6e7fea1fb0c1c), ROM_BIOS(2))
ROM_END
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
COMP( 1987, vt320, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT320", GAME_NOT_WORKING | GAME_NO_SOUND)
//COMP( 1989?, vt330, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT330", GAME_NOT_WORKING)
//COMP( 1989?, vt340, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT340", GAME_NOT_WORKING)
//COMP( 1990?, vt340p, 0, 0, vt320, vt320, driver_device, 0, "Digital Equipment Corporation", "VT340+", GAME_NOT_WORKING)
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