PS/2 Memory Reference
PS/2 SIMM-Memory SYSTEM-BOARD Matrix
#-Reference / Memory Specifications
Pin 72 to Pin 70, 69, 68 and 67 ( X = connected to GND)
For more details see Memory-Presence
Determination
#
|
Type
|
FRU P/N
|
MFG P/N
|
OPT P/N
|
Size
|
nS
|
Key
|
06
|
P
|
90X8624 |
68X6065
68X6245
65X6264
23F9173
23F9233 |
6450603 |
1M
|
85
|
X..X
|
07
|
P
|
92F0104 |
68X6127
4195816
6450604
65X1309
65X5804
65X6170
65X6197
65X6249
0701600
65X2429
82F5506 |
6450604
92G7196 |
2M
|
85
|
X.X.
|
14
|
P
|
92F0103
15F7658 |
65F5806
65X6198
65X5806 |
6450608 |
2M
|
80
|
.XX.
|
15
|
P
|
92F3337 |
68X6343
63X6384 |
87F9977
92G7199 |
4M
|
80
|
XXXX
|
16
|
P
|
64F3607 |
68X6344 |
6450129
92G7428 |
8M
|
80
|
.XXX
|
22
|
P
|
92F0102
64F3604 |
71F7008
87F5041 |
6450902
92G7198 |
2M
|
70
|
..XX
|
23
|
P
|
92F0105 |
71F7010
64F3605
31F2314
40G6055
78G9176 |
6450128
92G7200 |
4M
|
70
|
X.XX
|
24
|
P
|
64F3606 |
71F7011
78G9177 |
6450130
92G7202 |
8M
|
70
|
.X..
|
25
|
ECC
|
92F0097 |
42G3072 |
6451158 |
4M
|
70
|
X.XX
|
26
|
ECC
|
92F0098 |
42G3073
74G1105 |
6451159
92F7208 |
8M
|
70
|
.X..
|
38
|
High-Rel.
|
71G6203 |
|
|
4M
|
70
|
X.XX
|
39
|
High-Rel.
|
71G6204 |
|
|
8M
|
70
|
.X..
|
46
|
ECC
|
96F9100 |
42G3237 |
92G7209 |
16M
|
70
|
.X.X
|
71
|
ECC
|
06H7761 |
|
|
16M
|
60
|
|
72
|
ECC
|
06H7762 |
|
92G2941 |
32M
|
60
|
|
OEM-Memory (Substitute VENDOR SIMMs) Specifications
(for details see also above reference-list and same #)
#
|
Type
|
FRU P/N
|
OEM Number
|
Size
|
nS
|
07
|
P
|
92F0104 |
MNB36512S85
THM365120S-85
MSC2321-85YS18A
HB56D512361B-8
1600A53R1466
9011HCK
9011HAK
365120AFG
TC514256A
TC51256T 80
MN4B36512S85
MN41C42565J
MNSC2321-85YS18A |
2MB
|
85
|
14
|
P
|
92F0103 |
A25069180 |
2MB
|
80
|
16
|
P
|
64F3607 |
MSC2351-8AYS24AIB-7 |
8MB
|
80
|
22
|
P
|
92F0102 |
THM365120ASG-70
HM365120ASG-70
KMM536512BG-7
MSC2321-70YSI6A |
2MB
|
70
|
23
|
P
|
92F0105 |
94-VOHB56D00136IB-7 |
4MB
|
70
|
Memory-Presence
Determination
![](simmp.gif)
SIMMs that are not clearly labeled cannot be identified
other than by part number.
(For MEMORY component define, you will have the need to know about 70
or more timing/temperature parameters. Because this information will not
fit on a SIMM normally only P/N / Speed and Size is printed on a small
Label).
SIMM Identification (Single Inline
Memory Module)
72-pin memory SIMMs are usually marked with a label that shows the
size and speed (e.g. 1Mx32, 60ns). To determine the SIMM capacity
from the above example, divide 32-bits by 8 (1-byte) and multiply this
result by 1M, hence, SIMM = 4MB (SIMMs prefix -6R = RAS max.
60ns and Reduced CAS-timing (-2ns) appr. CAS = 19ns)
XMx32 is Non parity and XMx36 is Parity
.
PS/2 72-Pin SIMMs (for M/T 85xx/95xx)
A set of 4-Bits shows the state of the presence detect signals for
a specific memory connector. The setting of the presence-detect bits is
determined through registers (x'00E8' and x'00E9').
Not all of the following Memory-modules are supported
by every IBM computer.
Pin 72 to Pin 70, 69, 68 and 67 ( X = connected to GND)
Presence-Detect Bits table
Bits.
3 2 1 0
|
Measure
-ment
|
Single Inline Memory - Module Definition
|
1101
|
..X.
|
32MB 60-ns Industry
standard |
1001
|
.XX.
|
32MB 70-ns Industry
standard |
0101
|
X.X.
|
32MB 80-ns Industry
standard |
1110
|
...X
|
16MB 60-ns Industry
standard |
1010
|
.X.X
|
16MB 70-ns IBM and
Industry standard |
0110
|
X..X
|
16MB 80-ns Industry
standard |
1011
|
.X..
|
8MB 70-ns IBM and Industry
standard |
1000
|
.XXX
|
8MB 80-ns IBM and Industry
standard |
1000
|
.XXX
|
4MB 70-ns Industry
standard |
0100
|
X.XX
|
4MB 70-ns IBM |
0100
|
X.XX
|
4MB 80-ns Industry
standard |
0000
|
XXXX
|
4MB 80-ns IBM |
1001
|
.XX.
|
2MB 70-ns Industry
standard |
1100
|
..XX
|
2MB 70-ns IBM |
0101
|
X.X.
|
2MB 80-ns Industry
standard |
1001
|
.XX.
|
2MB 80-ns IBM |
0101
|
X.X.
|
2MB 85-ns IBM |
1110
|
...X
|
2MB 100-ns IBM |
1010
|
.X.X
|
1MB 70-ns Industry
standard |
0110
|
X..X
|
1MB 80-ns Industry
standard |
0110
|
X..X
|
1MB 85-ns IBM |
0010
|
XX.X
|
1MB 100-ns IBM |
1111
|
|
Connector is empty |
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