Intel 281809-003 Computer Hardware User Manual


 
Advanced/RH Technical Product Specification Page 28
Appendix C Memory Map
Address Range Address Range Size Description
1024K-512M 100000-20000000 511M Extended Memory
960K-1023K F0000-FFFFF 64K AMI System run time BIOS
944K-959K EC000-EFFFF 16K Main BIOS Recovery Code
936K-943K EA000-EBFFF 8K ESCD (Plug ‘N’ Play configuration area)
928K-935K E8000-E9FFF 8K OEM LOGO (available as UMB)
896K-927K E0000-E7FFF 32K BIOS RESERVED (Currently available as UMB)
800-895K C8000-DFFFF 96K Available HI DOS memory (open to ISA and PCI bus)
640K-799K A0000-C7FFF 160K Off-board video memory and BIOS
639K 9FC00-9FFFF 1K Extended BIOS Data (moveable by QEMM, 386MAX)
512K-638K 80000-9FBFF 127K Extended conventional
0K-511K 00000-7FFFF 512K Conventional
Table C-1. Advanced/RH Memory Map
The table above details the Advanced/RH memory map. The ESCD area from EA000-EBFFF is not available for use
as an Upper Memory Block (UMB) by memory managers. The area from E0000-E7FFF is currently not used by the
BIOS and is available for use as UMB by memory managers. Parts of this area may be used by future versions of the
BIOS to add increased functionality.