HP Model 715/100 hp 9000 series 700 model 715 workstations service handbook (a - Page 80

Determining the Faulty SIMM Pair

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Determining the Faulty SIMM Pair The address given by the System Responder Address is given as if the memory is contiguous, even though empty slots are permitted. Memory boards are installed in pairs of the same memory capacity. The operating system starts mapping memory at Pair 3, if it exists. In other words, it maps starting with the highest numbered pair through to the Pair 0. To determine the faulty pair of SIMMs, perform the following steps. 1. Using Table 4-8, determine the HEX value address range for each SIMM pair in the system. Table 4-8. Memory Address Ranges Pair (3 thru 0) Memory Address Range Size (MB) 0-8 8-16 16-24 24-32 32-40 40-48 48-56 56-64 64-72 72-80 80-88 88-96 96-104 104-112 112-120 120-128 128-136 136-144 144-152 152-160 160-168 168-176 176-184 184-192 192-208 208-224 224-240 240-256 0x00000000 - 0x007FFFFF 0x00800000 - 0x00FFFFFF 0x01000000 - 0x017FFFFF 0x01800000 - 0x01FFFFFF 0x02000000 - 0x027FFFFF 0x02800000 - 0x02FFFFFF 0x03000000 - 0x037FFFFF 0x03800000 - 0x03FFFFFF 0x04000000 - 0x047FFFFF 0x04800000 - 0x04FFFFFF 0x05000000 - 0x057FFFFF 0x05800000 - 0x05FFFFFF 0x06000000 - 0x067FFFFF 0x06800000 - 0x06FFFFFF 0x07000000 - 0x077FFFFF 0x07800000 - 0x07FFFFFF 0x08000000 - 0x087FFFFF 0x08800000 - 0x08FFFFFF 0x09000000 - 0x097FFFFF 0x09800000 - 0x09FFFFFF 0x0A000000 - 0x0A7FFFFF 0x0A800000 - 0x0AFFFFFF 0x0B000000 - 0x0B7FFFFF 0x0B800000 - 0x0BFFFFFF 0x0C000000 - 0x0CFFFFFF 0x0D000000 - 0x0DFFFFFF 0x0E000000 - 0x0EFFFFFF 0x0F000000 - 0x0FFFFFFF For example, if the system configuration is: Pair 3: Pair 2 Pair 1: Pair 0: 32 MB SIMMs = 64 MB total for pair 16 MB SIMMS = 32 MB total for pair 32 MB SIMMs = 64 MB total for pair 8 MB SIMMs = 16 MB total for pair 4-26 Troubleshooting

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4–26
Troubleshooting
Determining the Faulty SIMM Pair
The address given by the System Responder Address is given as if the memory is
contiguous, even though empty slots are permitted. Memory boards are installed in
pairs of the same memory capacity. The operating system starts mapping memory at
Pair 3, if it exists.
In other words, it maps starting with the highest numbered pair
through to the Pair 0. To determine the faulty pair of SIMMs, perform the following
steps.
1.
Using Table 4–8, determine the HEX value address range for each SIMM pair
in the system.
Table 4–8.
Memory Address Ranges
Pair
Memory
Address Range
(3 thru 0)
Size (MB)
______
0–8
0x00000000 – 0x007FFFFF
______
8–16
0x00800000 – 0x00FFFFFF
______
16–24
0x01000000 – 0x017FFFFF
______
24–32
0x01800000 – 0x01FFFFFF
______
32–40
0x02000000 – 0x027FFFFF
______
40–48
0x02800000 – 0x02FFFFFF
______
48–56
0x03000000 – 0x037FFFFF
______
56–64
0x03800000 – 0x03FFFFFF
______
64–72
0x04000000 – 0x047FFFFF
______
72–80
0x04800000 – 0x04FFFFFF
______
80–88
0x05000000 – 0x057FFFFF
______
88–96
0x05800000 – 0x05FFFFFF
______
96–104
0x06000000 – 0x067FFFFF
______
104–112
0x06800000 – 0x06FFFFFF
______
112–120
0x07000000 – 0x077FFFFF
______
120–128
0x07800000 – 0x07FFFFFF
______
128–136
0x08000000 – 0x087FFFFF
______
136–144
0x08800000 – 0x08FFFFFF
______
144–152
0x09000000 – 0x097FFFFF
______
152–160
0x09800000 – 0x09FFFFFF
______
160–168
0x0A000000 – 0x0A7FFFFF
______
168–176
0x0A800000 – 0x0AFFFFFF
______
176–184
0x0B000000 – 0x0B7FFFFF
______
184–192
0x0B800000 – 0x0BFFFFFF
______
192–208
0x0C000000 – 0x0CFFFFFF
______
208–224
0x0D000000 – 0x0DFFFFFF
______
224–240
0x0E000000 – 0x0EFFFFFF
______
240–256
0x0F000000 – 0x0FFFFFFF
For example, if the system configuration is:
Pair 3:
32 MB SIMMs
= 64 MB total for pair
Pair 2
16 MB SIMMS
= 32 MB total for pair
Pair 1:
32 MB SIMMs
= 64 MB total for pair
Pair 0:
8 MB SIMMs
= 16 MB total for pair