Memory Configurations And Addressing; Model 362 Memory Troubleshooting; Example: Total Memory Of 8 Mbytes - HP 9000 300 Series Service Handbook

Memory Configurations and Addressing
Table 4-2 lists all supported memory configurations.
Model 362 Memory Troubleshooting
Here is a chart showing the address ranges and possible board combinations for
a given total amount of memory:
Table 4-2. Model 362 Conb'oller RAM Addresses vs. Boards
Total RAM Address Ranges HP D2152A HP D2156A HP D2381A
Upper to Lower 8MB Boards 4MB Boards 2MB Boards
2 Mbytes
FFFFFFFF - FFEOOOOO
4MB Block
2MB Block
4 Mbytes
FFDFFFFF - FFCOOOOO
8MB Block 2MB Block
6 Mbytes FFBFFFFF - FFAOOOOO 4MB Block 2MB Block
8 Mbytes
FF9FFFFF - FF800000
Not used
10 Mbytes
FF7FFFFF - FF600000
4MB Block 2MB Block
12 Mbytes
FFSFFFFF - FF400000
8MB Block Not used
14 Mbytes FF3FFFFF - FF200000
Not used Not used
16 Mbytes FFlFFFFF - FFOOOOOO Not used
At least one RAM board must be placed in slot
RAM
0. Slot
RAM 1
may or may
not have a board installed.
Example: Total Memory of 8 Mbytes. A controller having a total memory of 8
Mbytes with two RAM boards has:
a Two 4 Mbyte RAM boards; one in slot
RAM 1
and one in slot
RAM
0 that
make up an 8 Mbyte block of memory with:
o An upper block address of FFFFFFFF 16 .
o A lower block address of FF800000t6·
A memory failure at address FF90A7C4t6 is on the RAM board in slot
RAM 1.
4-8 Troubleshooting