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HwB: 30 pin SIMM Connector

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30 pin SIMM

SIMM=Single Inline Memory Module.

30 PIN SIMM (At the computer)

30 PIN SIMM at the computer.

Pin Name Description
1 VCC +5 VDC
2 /CAS Column Address Strobe
3 DQ0 Data 0
4 A0 Address 0
5 A1 Address 1
6 DQ1 Data 1
7 A2 Address 2
8 A3 Address 3
9 GND Ground
10 DQ2 Data 2
11 A4 Address 4
12 A5 Address 5
13 DQ3 Data 3
14 A6 Address 6
15 A7 Address 7
16 DQ4 Data 4
17 A8 Address 8
18 A9 Address 9
19 A10 Address 10
20 DQ5 Data 5
21 /WE Write Enable
22 GND Ground
23 DQ6 Data 6
24 A11 Address 11
25 DQ7 Data 7
26 QP Data Parity Out
27 /RAS Row Address Strobe
28 /CASP Something Parity ????
29 DP Data Parity In
30 VCC +5 VDC
Note: SIMM above is a 4MBx9.
QP & DP is N/C on SIMMs without parity.
A9 is N/C on 256kB.
A10 is N/C on 256kB & 1MB. A11 is N/C on 256kB, 1MB & 4MB.
Contributor: Joakim Цgren, ">Helfried Behrendt
Source:  comp.sys.ibm.pc.hardware.* FAQ Part 4, maintained by ">Ralph Valentino
Please send any comments to Joakim Цgren.

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