Determining The Faulty Memory Card - HP 743 Service Handbook

Troubleshooting
Dealing with HPMC (Uncorrectable Error)

Determining the Faulty Memory Card

Memory is configured in a contiguous fashion starting at a base hexadecimal address of
0x00000000 to a maximum of 0x0FFFFFFF (256MB).
Memory is installed on the Model 743 in two stacks of up to four memory cards of 8MB,
16MB, 32MB, or 64MB capacity. The card on the bottom of Stack 1 is considered to be in
physical slot 0, the second board in Stack 1 is physical slot 1, the third card is physical slot
2, and the card in Stack 2 is physical slot 4.
During the boot process the system maps from Slot 0 to Slot 4, in that order. To determine
the failing memory card, you need to know the capacity of each memory card. The value
of the System Responder Address corresponds to the memory ranges of each mapped
memory card. Table 4-7 lists memory address ranges.
If the value of the System Responder Address is outside of the range of the installed mem-
ory cards, replace the CPU.
4-24
Table 4-7 Memory Address Ranges
Memory
Range
0 - 16
16 - 32
32 - 48
48 - 64
64 - 80
80 - 96
96 - 112
112 - 128
128 - 144
144 - 160
160 - 176
176 - 192
192 - 208 0x0C000000 - 0x0CFFFFFF
208 - 224 0x0D000000 - 0x0DFFFFFF
224 - 240
240 - 256
Responder Address Range
0x00000000 - 0x00FFFFFF
0x01000000 - 0x01FFFFFF
0x02000000 - 0x02FFFFFF
0x03000000 - 0x03FFFFFF
0x04000000 - 0x04FFFFFF
0x05000000 - 0x05FFFFFF
0x06000000 - 0x06FFFFFF
0x07000000 - 0x07FFFFFF
0x08000000 - 0x08FFFFFF
0x09000000 - 0x09FFFFFF
0x0A000000 - 0x0AFFFFFF
0x0B000000 - 0x0BFFFFFF
0x0E000000 - 0x0EFFFFFF
0x0F000000 - 0x0FFFFFFF