1-14 Technical Information
SYSTEM MEMORY
The system board provides 16-MB of standard random access memory (RAM).
Optional memory DIMMS with a value of 8-, 16-, or 32-MB can be added to increase sys-
tem memory up to a maximum of 80-MB (70ns Fast Page access or HyperPage access).
The DIMMS must be added in pairs of the same capacity. In addition, 256-KB of read-only
memory (ROM), 1 x 28F020, enables the system BIOS to be flashed.
The system provides 1-MB (TFT models) or 1.5-MB (DSTN model) of video RAM (60ns
HyperPage mode, self refresh).
The following Cache RAM is provided:
L1:
16KB (Internal Pentium P54C-133)
32KB (Internal Pentium P55C-150MMX)
L2: 256 KB PipeLineBurst-SRAM.
Memory Map
The system supports system and video shadowing, both controlled through complementary
metal oxide semiconductor (CMOS). The system supports BIOS as a cacheable area with
write protection. Table Section 1-2 lists the system memory map.
Table Section 1-2 Memory Map
Memory Space
Size
Function
0000000h-0009FFFFh
640 KB
DOS Applications & Optional Memory Space Gap
00A0000h-000B7FFF
96 KB
Video (VGA) Graphic Memory
00B8000h-000BFFFFh
32 KB
Text Mode Memory (SMM Space)
00C0000h-000C9FFF
40 KB
Video (VGA) BIOS
00CA000h-000CFFFFh
24 KB
PnP BIOS / PCI BIOS
00D0000h-000DFFFFh
64 KB
Setup / PCMCIA Window (Extended Memory or
Upper Memory Block)
00E0000h-000FFFFFh
128 KB
System BIOS ROM
0000000h -00FFFFFFh
16 MB
Total Base Memory
0000000h -FFFEFFFFh
80 MB
Total Extension Memory
