HP Model 712/100 hp 9000 series 700 model 712 service handbook (a2615-90039) - Page 66

Determining the Faulty SIMM, Memory Size MB, Address Range

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Determining the Faulty SIMM The System Responder Address is stated as if the memory is contiguous. This procedure assumes the following: D memory boards are installed in pairs of the same memory capacity D memory boards are installed first in Pair 0 (Slots 0 and 1) D there are no empty slots between memory boards To determine the faulty SIMM, perform the following steps. 1. Using Table 4-3, determine the HEX value address range for each SIMM pair in the system. Table 4-3. Memory Address Ranges Memory Size (MB) 1 MB 2 MB 4 MB 8 MB 16 MB 32 MB 64 MB 128 MB 192 MB Address Range 0x00000000 - 0x000FFFFF 0x00000000 - 0x001FFFFF 0x00000000 - 0x003FFFFF 0x00000000 - 0x007FFFFF 0x00000000 - 0x00FFFFFF 0x00000000 - 0x01FFFFFF 0x00000000 - 0x03FFFFFF 0x00000000 - 0x07FFFFFF 0x00000000 - 0x13FFFFFF For example, if the system configuration is: Pair 1: Pair 0: 16 MB SIMMs = 32 MB total for pair = 0x01FFFFFF 8 MB SIMMs = 16 MB total for pair = 0x00FFFFFF The SIMM address ranges are: Pair 1: Pair 0: Addresses 0x00000000 - 0x01FFFFFF Addresses 0x02000000 - 0x02FFFFFF Troubleshooting 4-7

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Troubleshooting
4–7
Determining the Faulty SIMM
The System Responder Address is stated as if the memory is contiguous. This proce-
dure assumes the following:
D
memory boards are installed in pairs of the same memory capacity
D
memory boards are installed first in Pair 0 (Slots 0 and 1)
D
there are no empty slots between memory boards
To determine the faulty SIMM, perform the following steps.
1.
Using Table 4–3, determine the HEX value address range for each SIMM pair
in the system.
Table 4–3.
Memory Address Ranges
Memory Size (MB)
Address Range
1 MB
0x00000000 – 0x000FFFFF
2 MB
0x00000000 – 0x001FFFFF
4 MB
0x00000000 – 0x003FFFFF
8 MB
0x00000000 – 0x007FFFFF
16 MB
0x00000000 – 0x00FFFFFF
32 MB
0x00000000 – 0x01FFFFFF
64 MB
0x00000000 – 0x03FFFFFF
128 MB
0x00000000 – 0x07FFFFFF
192 MB
0x00000000 – 0x13FFFFFF
For example, if the system configuration is:
Pair 1:
16 MB SIMMs
= 32 MB total for pair = 0x01FFFFFF
Pair 0:
8 MB SIMMs
= 16 MB total for pair = 0x00FFFFFF
The SIMM address ranges are:
Pair 1:
Addresses 0x00000000 – 0x01FFFFFF
Pair 0:
Addresses 0x02000000 – 0x02FFFFFF