Specifications

Software Configuration
3–29
3.17 SYSTEM MEMORY MAP
The Little Board/P5i architecture allows it to address up to 128M bytes of memory. Table 3–9 shows how
this memory is used.
The DRAM, the byte-wide sockets, and ROM BIOS occupy the first megabyte (starting at 00000h). You
can install up to 128M bytes of DRAM onboard with 4M, 8M, 16M, 32M, and 64M byte 72-pin SIMMs.
The BIOS automatically determines how much memory is in the system during POST. If the amount of
memory is different from the amount in the system the last time the SETUP information was saved, you
must enter SETUP and save the SETUP contents again to prevent an error message from being displayed
during POST.
Table 3–9 Memory Map
Memory Address Function
0 - FFFFFFFFh Total System Address Range
0 - 9FFFFh Lower System DRAM
0100000h - 7FFFFFFh Extended Memory DRAM
0A0000h - 0BFFFFh Video RAM, as follows:
CGA Video: B8000-BFFFFh
Monochrome: B0000-B7FFFh
EGA,VGA, and SuperVGA video: A0000-AFFFFh
0C0000h - 0C9FFFh Video BIOS for Onboard Video Controller.
CA000h - CBFFFh Ampro BIOS Extensions
CC000h - Dxxxxh Adaptec SCSI BIOS
D0000h - DFFFFh Byte-Wide Memory Socket (S0) if Enabled
D0000h - DFFFFh Onboard User Flash Memory (S1) if Enabled
E0000h - EFFFFh System ROM BIOS (during system initialization)
F0000h - FFFFFh System ROM BIOS (always resident)