IBM PC 100, Техническое руководство

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Chapter 2. Connectors and Jumpers
System Board Memory Connectors
The following figure shows the signal and pin assignments for the 72-pin system board memory
connectors. Data bits 0 through 15 are the low word, and data bits 16 through 31 are the high word.
Figure 19. System Board Memory Connector Signal and Pin Assignments
Pin Signal Pin Signal
1 Ground 37 Parity 1 not used
2 Data 0 38 Parity 3 not used
3 Data 16 39 Ground
4 Data 1 40 Column address strobe 0
5 Data 17 41 Column address strobe 2
6 Data 2 42 Column address strobe 3
7 Data 18 43 Column address strobe 1
8 Data 3 44 Row address strobe 0
9 Data 19 45 Row address strobe 1
10
+
5 V dc 46 Reserved
11 Reserved 47 Write enable
12 Address 0 48 Reserved
13 Address 1 49 Data 8
14 Address 2 50 Data 24
15 Address 3 51 Data 9
16 Address 4 52 Data 25
17 Address 5 53 Data 10
18 Address 6 54 Data 26
19 Address 10 55 Data 11
20 Data 4 56 Data 27
21 Data 20 57 Data 12
22 Data 5 58 Data 28
23 Data 21 59
+
5 V dc
24 Data 6 60 Data 29
25 Data 22 61 Data 13
26 Data 7 62 Data 30
27 Data 23 63 Data 14
28 Address 7 64 Data 31
29 Reserved 65 Data 15
30
+
5 V dc 66 Reserved
31 Address 8 67 Reserved
32 Address 9 68 Reserved
33 Row address strobe 3 69 Reserved
34 Row address strobe 2 70 Reserved
35 Parity 2 not used 71 Reserved
36 Parity 0 not used 72 Ground
Chapter 2. Connectors and Jumpers
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