T e c h n i c a l I n f o r m a t i o n
OWNER’S HANDBOOK 5-5
Memory Map
Address Range (hex)
Amount
Function
0000,0000 – 0003,FFFF
256 KB
Base system memory (fixed)
0004,0000 – 0007,FFFF
256 KB
Base system memory (fixed)
0008,0000 – 0009,FFFF
128 KB
Base system memory or ISA
memory enabled in Setup
000A,0000 – 000B,FFFF
128 KB
ISA video DRAM
000C,0000 – 000E,FFFF
192 KB
Off board video BIOS (can be
shadowed) AIC-7870 SCSI BIOS
(can be shadowed)
000F,0000 – 000F,FFFF
64 KB
ISA memory, system BIOS (fixed)
0010,0000 – 00EF,FFFF
14 MB
System memory or unused
00F0,0000 – 00FF,FFFF
1 MB
System memory or EISA/ISA
memory
0100,0000 – 3FFF,FFFF
1008 MB
System memory or unused
4000,0000 – BFFF,FFFF
1024 MB
EISA memory or I/O slave memory
C000,0000 – C1FF,FFFF
32 MB
Memory mapped math
coprocessor
C200,0000 – FEBF,FFFF
944 MB
EISA memory or I/O slave memory
FEC0,0000 – FEC0,0FFF
4 KB
I/O APIC #1
FEC0,1000 – FEC0,1FFF
4 KB
I/O APIC #2
FEC0,2000 – FEC0,2FFF
4 KB
I/O APIC #3
FEC0,3000 – FEC0,3FFF
4 KB
I/O APIC #4
FEC0,4000 – FFDF,4FFF
32752 KB
EISA memory or I/O slave memory
FFE0,0000 – FFFF,FFFF
32 KB
EISA (BIOS/ECU)
