Specifications

Page A-1
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Appendix A -
Chip Set and I/O Map
Memory Map
The PicoPower PC/AT chipset supports 25 bits of the 32-bit physical memory
address. Memory at addresses between 0 and the theoretical maximum (32 MB
system plus 1MB video) of 20FFFFF is mapped as follows:
Address range Region Cached?
00000000-0009FFFF
640K "DOS" memory yes
000A0000-000BFFFF
VGA memory no
000C0000-000C7FFF
Shadowed VGA BIOS yes
000C8000-000DFFFF
available no
000E0000-000E7FFF
Flash Disk window no
000E8000-000EFFFF
available no
000F0000-000FFFFF
Shadowed BIOS yes
00100000-01FFFFFF
DRAM yes
00200000-020FFFFF
VGA memory no
Table A-1. Memory Map.
C8000 - 0DFFFF may be used either as page frame, BIOS extension, I/O buffer
(i.e. for extended memory managers, Ethernet, etc.) or may be used by DOS as upper
memory blocks if an extended memory manager driver is installed.