Connector - 30 pin SIMMSIMM=Single Inline Memory Module.30 PIN SIMM at the computer.  | (at the computer) |
Pin | Name | Description |
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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.
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