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Appendix A - System Resources A-1
Appendix A System Resources
A.1 Memory Map
Table A-1 System Memory Map
Address Size Function
0000000 ~ 009FFFF 640 KB system memory Onboard DRAM
00A0000 ~ 00BFFFF 128 KB video RAM
Reserved for graphics display buffer,
non-cacheable
00C0000 ~ 00C7FFF 32 KB for VGA BIOS Reserved for ROM on I/O adapters
00C8000 ~ 00CFFFF 32 KB I/O expansion ROM Reserved for ROM on I/O adapters
00D0000 ~ 00D3FFF 16 KB I/O expansion ROM Reserved for ROM on I/O adapters
00D4000 ~ 00D7FFF 16 KB I/O expansion ROM Reserved for ROM on I/O adapters
00D8000 ~ 00DBFFF 16 KB I/O expansion ROM Reserved for ROM on I/O adapters
00DC000 ~ 00DFFFF 16 KB I/O expansion ROM Reserved for ROM on I/O adapters
00E0000 ~ 00E7FFF 32 KB for SCSI BIOS Reserved SCSI BIOS
00E8000 ~ 00EFFFF 32 KB Reserved onboard (video RAM
BIOS)
00F0000 ~ 00FFFFF 64 KB BIOS
System ROM BIOS (ROM)
System RAM BIOS (DRAM)
0100000 ~ 0F9FFFF System memory Onboard DRAM
0FA0000 ~ 0FFFFFF 384 KB I/O card memory
Reserved for memory map I/O card,
non-cacheable
1000000 ~ FFFFFFF System memory Onboard DRAM