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Mitsubishi Electric Apricot LS 550 Owner's Handbook Manual Page 51

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E x p a n s i o n C a r d s
I/O ports
240h-24Fh, 250h-253Fh
278h-27Fh
2B0h-2DFh
2F8h-2FFh
300h-301Fh
330h-331Fh
378h-37Fh
388h-38Fh
3B0h-3BFh
3B4h, 3B5h, 3BAh
3C0h-3C5h
3C6h-3C9h
3CAh-3DFh
3F0h-3F7h
3F8h-3FFh
Base memory address
Some expansion cards are fitted with memory of their own, usually
read-only memory (ROM) containing functional extensions to the
computer's BIOS (basic input/output system) ROM. Some cards
also have random-access memory (RAM).
In order that this memory can be recognised by the system
processor, it must be mapped somewhere within the computer's
own address space. By setting the base memory address you specify
where the card's memory begins within the address space. Typically,
an expansion card's memory must be mapped onto the addresses
between C8000h and EFFFFh in upper memory. With most
modern expansion cards this is fully automatic.
4/6
LS/VS 550 OWNER'S HANDBOOK
Default assignment
Alternate Sound blaster system
Parallel port 2
Alternate VGA
Serial port 2
Alternate MIDI (disable)
MIDI
Parallel port 1
FM synthesiser
Monochrome display and printer adapter
Video subsystem
VGA
Video DAC
VGA
Diskette drive controller
Serial port 1

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