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Maps
I/O Address Map
Hex range
000 - 00F
020 - 021
040 - 043
048 - 04B
060 - 06E
070 - 071
080 - 08F
0A0 - 0A1
0C0 - 0DF
1F0 - 1F7
3F6 , 3F7
2F8 - 2FF
378 - 37A
3B4 , 3B5
3D4 , 3D5
3BA
3C0 - 3DA
3F2 - 3F7
3F0 , 3F1
3F8 - 3FF
System Memory Map
ADDRESS
000000 -
09FFFF
0A0000 -
0BFFFF
0C0000 -
0CFFFF
0D0000 -
0DFFFF
0E0000 -
0EFFFF
0F0000 -
0FFFFF
100000 -
Device
DMA controller-1
Interrupt controller-1
Timer 1
Timer 2
KB controller M38813 chip
RTC and NMI mask
DMA page register
Interrupt controller-2
DMA controller-2
Fixed disk select
Serial port 2
Parallel port 1
CRT controller index (mono)
CRT controller index (color)
Feature control
Floppy disk controller
Configuration port
Serial port 1
SIZE
640KB
128KB
64KB
64KB
64KB
64KB
16MB to 256MB
FUNCTION
640KB Base Memory
Video RAM
VGA BIOS
Reserved
System BIOS for SCU,
PCI, PnP, PMU
System BIOS for Kernal
Extended Memory
6
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