Technical data

Device Mapping
B-2
CPU Memory Address Map
Address Range Function Size
00000 to 9FFFF Main memory 640 KB
A0000 to BFFFF PCI/ISA video or SMM buffer
memory
128 KB
C0000 to DFFFF PCI/ISA expansion board BIOS
and buffer memory
128 KB
E0000 to EFFFF ISA adapter RAM (non-shadow) 64 KB
F0000 to FFFFF System BIOS memory 64 KB
I/O Address Map
Range
(hexadecimal) Function
060 to 064 Keyboard/mouse controller
0F8 to 0FF Math co-processor
1F0 to 1F7 IDE controller (if enabled)
378 to 37F LPT2 (if enabled)
2E8 COM4 (if enabled)
2F8 COM2 (if enabled)
3BC to 3BF LPT1 (if enabled)
278 to 27F LPT3 (if enabled)
3E8 COM3 (if enabled)
3F0 to 3F5 Diskette controller (if enabled)
3F8 COM1 (if enabled)