Memory Map
Range
CPU address
Region
Cached
0 to 640K
00000000-0009FFFF
DRAM
yes
640K to 768K
000A0000-000BFFFF
VGA memory
no
768K to 816K
000C0000-000CBFFF
Shadowed VGA BIOS
yes
816K to 896K
000CC000-000DFFFF
ISA bus or UBE
yes
896K to 1M
000E0000-000FFFFF
Shadowed System ROM BIOS
yes
1M to 16M
00100000-00FFFFFF
DRAM
yes
If no DRAM, ISA or PCI memory
no
16M to 64M
01000000-0FFFFFFF
DRAM
yes
If no DRAM, PCI
no
64M to (4.0G–512K)
10000000-FFF7FFFF
PCI
no
Top 512K to Top 16K FFF80000-FFFFFFFF
FBD
no
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Planar Clean Screen II PC User’s Manual
CS II Manual LAYOUT#2304 3/25/99 11:16 AM Page 8