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Chapter 4 – Programming
Memory Map
Address Range
FFFC0000-FFFFFFFF
Top of DRAM-FFFBFFFF
00100000-0FFFFFFF
00100000-07FFFFFF
00100000-03FFFFFF
00100000-01FFFFFF
00100000-00FFFFFF
00100000-007FFFFF
000F0000-000FFFFF
000E0000-000EFFFF
00D0000-00DFFFF
000CC000-000CFFFF
000C0000-000CBFFF
000A0000-000BFFFF
00000000-0009FFFF
The PCI devices are located at the very top of memory, just below the
system BIOS.
Table 4-1 XVME-653/658 Memory Map
Size
256 KB
System BIOS
Allocated to PCI bus by BIOS or operating system*
256 MB
System DRAM
128 MB
64 MB
32 MB
16 MB
8 MB
64 KB
System BIOS
64 KB
System BIOS, Universe chip, or I/O channel memory
64 KB
Universe chip, I/O channel memory, SRAM, or DiskOnChip
16 KB
I/O channel memory, SRAM, or DiskOnChip
48 KB
VGA BIOS
128 KB
VGA DRAM memory
640 KB
System DRAM
*Note
Usage
4-1
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