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B-1
B. MEMORY & I/O MAPS Memory Mapping
Address
Function
00000-9FFFF 0-640
KB
DRAM
A0000-BFFFF Video
DRAM
C0000-CBFFF Video
BIOS
Optional ROM (Free)
LAN BIOS around 30KB if activated, address may vary
CC000-FFFFF
SCSI BIOS 18KB at runtime, 2KB if no device, address may vary
E0000-FFFFF System
BIOS
100000-Top of DRAM
1 MB - Top of DRAM
1MB to top of DRAM
System BIOS
See detailed map
to the right
0 - 640KB DRAM
Optional ROM (Free)
SCSI BIOS (18KB at runtime)
Video BIOS
Video DRAM
LAN BIOS if activated (~30KB)
Optional ROM (Free)
100000h
A0000h
FFFFFh
E0000h
See Note 1
See Note 2
C 000h
C
C0000h
A0000h
Note 1 : LAN BIOS address may vary
Note 2 : SCSI BIOS address may vary.
Size is only 2KB if no device.