Mitsubishi Electric Apricot VS Owner's Handbook Manual page 30

I/O ports
All addresses below 100h are used by the system board for various
fixed system components and chipset controller settings.
They are unavailable for use.
1F0h-1F7h
200h-207h
278h-27Fh
2B0h-2DFh
2F8h-2FFh
378h-37Fh
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.
S Y S T E M E X P A N S I O N
Default assignment
Hard disk drive controller
Game I/O
Parallel port 2
Alternate VGA
Serial port 2
Parallel port 1
Monochrome display and printer adapter
Video subsystem
VGA
Video DAC
VGA
Diskette drive controller
Serial port 1
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