Memory Map (Lpx 560/566 Full Range); Memory Map (Lpx 560/566 Pc Compatibility Range); Chapter 5 Device Mapping - DEC DECpc LPx Service Maintenance Manual

Device Mapping

Memory Map (LPx 560/566 Full Range)

Range
0 KB to 512KB
512KB to 1024KB (1MB)
1MB to 16MB
16MB to 128MB
128MB to 4GB

Memory Map (LPx 560/566 PC Compatibility Range)

Address Range
0000 to 7FFFF
80000 to 9FFFF
A0000 to BFFFF
C0000 to C7FFF
C8000 to DFFFF
E0000 to EBFFF
EC000 to EFFFF
F0000 to FFFFF
84
Function
main memory
main memory
main memory
memory space gap
main memory
PCI memory
Function
Main memory
Main/PCI/ISA memory
PCI/ISA video buffer memory
Video memory BIOS
PCI/ISA card BIOS and buffer
memory
ISA/PCI adapter RAM after
POSTUsed by BIOS Setup during
POST
SCSI BIOS (if enabled)
Planar BIOS memory
Digital DECpc LPx/LPx+
Notes
PC compatibility range
PC compatibility range
EISA/ISA memory lower limit
EISA/ISA memory upper limit
PCI memory hole
(4MB max size)
Pentium upper limit
Size
512 KB
128 KB
128 KB
32 KB
96 KB
64 KB
(48 KB if SCSI BIOS enabled)
16 KB
64 KB
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