SIMM=Single Inline Memory Module
(At the computer)
72 PIN SIMM at the computer.
| Pin | Non-Parity | Parity | Description |
|---|---|---|---|
| 1 | VSS | VSS | Ground |
| 2 | DQ0 | DQ0 | Data 0 |
| 3 | DQ18 | DQ18 | Data 18 |
| 4 | DQ1 | DQ1 | Data 1 |
| 5 | DQ19 | DQ19 | Data 19 |
| 6 | DQ2 | DQ2 | Data 2 |
| 7 | DQ20 | DQ20 | Data 20 |
| 8 | DQ3 | DQ3 | Data 3 |
| 9 | DQ21 | DQ21 | Data 21 |
| 10 | VCC | VCC | +5 VDC |
| 11 | n/c | n/c | Not connected |
| 12 | A0 | A0 | Address 0 |
| 13 | A1 | A1 | Address 1 |
| 14 | A2 | A2 | Address 2 |
| 15 | A3 | A3 | Address 3 |
| 16 | A4 | A4 | Address 4 |
| 17 | A5 | A5 | Address 5 |
| 18 | A6 | A6 | Address 6 |
| 19 | A10 | A10 | Address 10 |
| 20 | DQ4 | DQ4 | Data 4 |
| 21 | DQ22 | DQ22 | Data 22 |
| 22 | DQ5 | DQ5 | Data 5 |
| 23 | DQ23 | DQ23 | Data 23 |
| 24 | DQ6 | DQ6 | Data 6 |
| 25 | DQ24 | DQ24 | Data 24 |
| 26 | DQ7 | DQ7 | Data 7 |
| 27 | DQ25 | DQ25 | Data 25 |
| 28 | A7 | A7 | Address 7 |
| 29 | A11 | A11 | Address 11 |
| 30 | VCC | VCC | +5 VDC |
| 31 | A8 | A8 | Address 8 |
| 32 | A9 | A9 | Address 9 |
| 33 | /RAS3 | /RAS3 | Row Address Strobe 3 |
| 34 | /RAS2 | /RAS2 | Row Address Strobe 2 |
| 35 | n/c | PQ26 | Parity 26 (3rd) |
| 36 | n/c | PQ8 | Parity 8 (1st) |
| 37 | n/c | PQ17 | Parity 26 (3rd) |
| 38 | n/c | PQ35 | Parity 35 (4th) |
| 39 | VSS | VSS | Ground |
| 40 | /CAS0 | /CAS0 | Column Address Strobe 0 |
| 41 | /CAS2 | /CAS2 | Column Address Strobe 2 |
| 42 | /CAS3 | /CAS3 | Column Address Strobe 3 |
| 43 | /CAS1 | /CAS1 | Column Address Strobe 1 |
| 44 | /RAS0 | /RAS0 | Row Address Strobe 0 |
| 45 | /RAS1 | /RAS1 | Row Address Strobe 1 |
| 46 | n/c | n/c | Not connected |
| 47 | /WE | /WE | Read/Write |
| 48 | n/c | n/c | Not connected |
| 49 | DQ9 | DQ9 | Data 9 |
| 50 | DQ27 | DQ27 | Data 27 |
| 51 | DQ10 | DQ10 | Data 10 |
| 52 | DQ28 | DQ28 | Data 28 |
| 53 | DQ11 | DQ11 | Data 11 |
| 54 | DQ29 | DQ29 | Data 29 |
| 55 | DQ12 | DQ12 | Data 12 |
| 56 | DQ30 | DQ30 | Data 30 |
| 57 | DQ13 | DQ13 | Data 13 |
| 58 | DQ31 | DQ31 | Data 31 |
| 59 | VCC | VCC | +5 VDC |
| 60 | DQ32 | DQ32 | Data 32 |
| 61 | DQ14 | DQ14 | Data 14 |
| 62 | DQ33 | DQ33 | Data 33 |
| 63 | DQ15 | DQ15 | Data 15 |
| 64 | DQ34 | DQ34 | Data 34 |
| 65 | DQ16 | DQ16 | Data 16 |
| 66 | n/c | n/c | Not connected |
| 67 | PD1 | PD1 | Presence Detect 1 |
| 68 | PD2 | PD2 | Presence Detect 2 |
| 69 | PD3 | PD3 | Presence Detect 3 |
| 70 | PD4 | PD4 | Presence Detect 4 |
| 71 | n/c | n/c | Not connected |
| 72 | VSS | VSS | Ground |
Notes: A9 is a N/C on 256k and 512k modules.
A10 is a N/C on 256k, 512k, 1M and 4M modules.
RAS1/RAS3 are N/C on 256k, 1M and 4M modules.