Memory Map - IBM Aptiva Handbook

Memory map

Table 9 shows the default hexadecimal addresses for the system memory regions. You may use this information for
adapter cards that require you to set up memory regions.
Additional resources may be taken by Plug and Play (PnP) devices. Resources for installed PnP devices, such as the
modem card, can be reassigned by the BIOS or the Windows 95 Device Manager.
Table 9: Memory map
Address range
0-640 KB (0-9FFFFH)
640-768 KB (A0000-BFFFFH)
768-800 KB (C0000-C7FFFH)
800-896 KB (C8000-DFFFFH)
896-960 KB (E0000-EFFFF)
960-1024 KB (F0000-FFFFFH)
1024 KB-64 MB (100000-3FFFFFFF)
192 MB-256 MB (C000000H-FFFFFFFF)
256 MB-257 MB (10000000-10000FFF)
Description
Base memory
VGA mode video memory
Video BIOS
Adapter card memory or upper memory
System POST and Rapid Resume BIOS (available for
upper memory)
System BIOS (some may be available for upper memory)
Extended memory
Linear video memory
Memory-mapped I/O for video
Memory map 139