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/**********************************************************************
Luxor ABC DOS card emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
*********************************************************************/
/*
PCB Layout
----------
55 10762-01
|-----------------------------------|
| |
| |
| |
| |
| ROM3 ROM2 |
| |
| |
| |
| |
| |
| ROM1 ROM0 |
| |
| |
| |
| |
| |
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| LS02 LS139 |
| |
| |
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| LS367 LS241 LS241 |
| |
| |
| |
| |
|--|-----------------------------|--|
|------------CON1-------------|
Notes:
All IC's shown.
ROM0 - Synertek C55022 4Kx8 ROM "DOSDD80"
ROM1 - Motorola MCM2708C 1Kx8 EPROM "9704"
ROM2 - empty socket
ROM3 - empty socket
CON1 - ABC bus connector
*/
#include "abc_dos.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
const device_type ABC_DOS = &device_creator<abc_dos_device>;
//-------------------------------------------------
// ROM( abc_dos )
//-------------------------------------------------
ROM_START( abc_dos )
ROM_REGION( 0x2000, "dos", ROMREGION_ERASEFF )
ROM_DEFAULT_BIOS("ufd20")
ROM_SYSTEM_BIOS( 0, "abcdos", "ABC-DOS" ) // Scandia Metric FD2
ROMX_LOAD( "abcdos.3d", 0x0000, 0x1000, CRC(2cb2192f) SHA1(a6b3a9587714f8db807c05bee6c71c0684363744), ROM_BIOS(1) )
ROM_SYSTEM_BIOS( 1, "dosdd80", "ABC-DOS DD" ) // ABC 830
ROMX_LOAD( "dosdd80.3d", 0x0000, 0x1000, CRC(36db4c15) SHA1(ae462633f3a9c142bb029beb14749a84681377fa), ROM_BIOS(2) )
ROM_SYSTEM_BIOS( 2, "ufd20", "UFD-DOS v.20" ) // ABC 830
ROMX_LOAD( "ufddos20.3d", 0x0000, 0x1000, CRC(69b09c0b) SHA1(403997a06cf6495b8fa13dc74eff6a64ef7aa53e), ROM_BIOS(3) )
ROM_LOAD( "printer.4c", 0x1000, 0x400, NO_DUMP )
//ROM_LOAD( "spare.4a", 0x1400, 0x400, NO_DUMP )
ROM_LOAD( "9704.3c", 0x1800, 0x400, NO_DUMP )
//ROM_LOAD( "spare.3a", 0x1c00, 0x400, NO_DUMP )
ROM_END
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const rom_entry *abc_dos_device::device_rom_region() const
{
return ROM_NAME( abc_dos );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// abc_dos_device - constructor
//-------------------------------------------------
abc_dos_device::abc_dos_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, ABC_DOS, "ABC DOS", tag, owner, clock),
device_abcbus_card_interface(mconfig, *this)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void abc_dos_device::device_start()
{
}
//**************************************************************************
// ABC BUS INTERFACE
//**************************************************************************
//-------------------------------------------------
// abcbus_xmemfl -
//-------------------------------------------------
UINT8 abc_dos_device::abcbus_xmemfl(offs_t offset)
{
UINT8 data = 0xff;
if (offset >= 0x6000 && offset < 0x8000)
{
data = memregion("dos")->base()[offset & 0x1fff];
}
return data;
}
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