Technical data

Device Mapping
6-2
Processor Memory Address Map
Address Range Function Size
00000 to 9FFFF Main memory 640 KB
A0000 to BFFFF PCI/ISA video buffer memory 128 KB
C0000 to C7FFF Video memory BIOS 32 KB
C8000 to DFFFF PCI/ISA expansion board BIOS
and buffer memory
96 KB
E0000 to EFFFF ISA adapter RAM 64 KB
F0000 to FFFFF System BIOS memory 64 KB
I/O Address Map
Range
(hexadecimal) Function
060 to 064 Keyboard/mouse controller
0F0 to 0FF Math co-processor
1F0 to 1F7 IDE controller (if enabled)
278 to 27F LPT2 (if enabled)
2E8 COM4 (if enabled)
2F8 COM2 (if enabled)
378 to 37F LPT1 (if enabled)
3BC to 3BE LPT3 (if enabled)
3E8 COM3 (if enabled)
3F0 to 3F7 Diskette controller (if enabled)
3F8 COM1 (if enabled)