/* Imported from Wayback Machine
   Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:plasmo:spx-mpu:mpuconn:din96
   Snapshot date: 2025-06-14
   Generator    : wayback-archiver
*/

**96-pin DIN 41612 connector**

|**Pin**|**Function**       |**Comments**                                      |
|C1     |Power In           |28V in, cathode of CRB12-2                        |
|C2     |82C55PC0           |82C55 PC0 via 1K resistor                         |
|C3     |Invert of Green LED|Low when green LED lit, High when green LED is off|
|C4     |82C55PC1           |82C55 PC1 via resistor                            |
|C5     |68302TCLK+RS485    |68302 TCLK1+                                      |
|C6     |68692OP3-RS232     |driven by OP3 of 68692                            |
|C7     |68692TxDB-RS232    |driven by 68692-13 TxDB                           |
|C8     |68692OP1-RS232     |driven by OP1 of 68692                            |
|C9     |68692-IP3-RS232    |goes to 68692-3 (IP3)                             |
|C10    |GND                |Digital Ground                                    |
|C11    |686892RxDB-RS232   |driven by 68692-11 RxDB                           |
|C12    |                   |To 68692-5 (IP1)                                  |
|C13    |68302nIACK1        |To 68302-110(nIACK1) with 10K pullup              |
|C14    |82C55PA6           |82C55 PA6                                         |
|C15    |GND                |Digital Ground                                    |
|C16    |68302nIACK7        |To 68302-108(nIACK7) with 10K pullup              |
|C17    |68302nIACK6        |To 68302-109(nIACK6) with 10K pullup              |
|C18    |GND                |Digital Ground                                    |
|C19    |82C55PC5           |driven by PC5 of 82C55-14                         |
|C20    |GND                |Digital Ground                                    |
|C21    |TPA7               |To TPA7 test point and Vpp (pin 1) of UB2 & UB3   |
|C22    |82C55PC6           |driven by PC6 of 82c55-13                         |
|C23    |TP11-1             |driven by nPBRST of UI2-14                        |
|C24    |82C55PC7           |driven by PC7 of 82c55-11                         |
|C25    |GND                |Digital Ground                                    |
|C26    |82C55PA4           |82C55 PA4                                         |
|C27    |discrete In, D9    |10K resistor isolation and pull up                |
|C28    |discrete In, D11   |10K resistor isolation and pull up                |
|C29    |discrete In, D13   |10K resistor isolation and pull up                |
|C30    |discrete In, D15   |10K resistor isolation and pull up                |
|C31    |82C55PA7           |82C55 PA7                                         |
|C32    |Power In           |28V in, annode of CRB12-3                         |
|B1     |GND                |Digital Ground                                    |
|B2     |68302RxD1+RS485    |68302 RxD1+                                       |
|B3     |68302RxD1-RS485    |68302 RxD1-                                       |
|B4     |82C55PC4           |driven by PC4 via resistor network                |
|B5     |68302TCLK-RS485    |68302 TCLK-                                       |
|B6     |68302RxD2-RS485    |to 68302 RxD2-                                    |
|B7     |68302RxD2+RS485    |to 68302RxD2+                                     |
|B8     |68302TxD2+RS485    |driven by 68302-54 TxD2+                          |
|B9     |68302TxD2-RS485    |driven by 68302-54 TxD2-                          |
|B10    |GND                |Digital Ground                                    |
|B11    |82C55PA0           |82C55 PA0                                         |
|B12    |82C55PA1           |82C55 PA1                                         |
|B13    |82C55PA2           |82C55 PA2                                         |
|B14    |82C55PA3           |82C55 PA3                                         |
|B15    |GND                |Digital Ground                                    |
|B16    |82C55PA5           |82C55 PA5                                         |
|B17    |82C55PB6           |82C55 PB6                                         |
|B18    |82C55PB7           |82C55 PB7                                         |
|B19    |82C55PB4           |82C55 PB4                                         |
|B20    |GND                |Digital Ground                                    |
|B21    |82C55PB5           |82C55 PB5                                         |
|B22    |82C55PB2           |82C55 PB2                                         |
|B23    |82C55PB3           |82C55 PB3                                         |
|B24    |82C55PB1           |82C55 PB1                                         |
|B25    |GND                |Digital Ground                                    |
|B26    |68692IP5-RS232     |to IP5 of 68692                                   |
|B27    |discrete In, D8    |10K resistor isolation and pull up                |
|B28    |discrete In, D10   |10K resistor isolation and pull up                |
|B29    |discrete In, D12   |10K resistor isolation and pull up                |
|B30    |discrete In, D14   |10K resistor isolation and pull up                |
|B31    |discrete In        |Complex ckt                                       |
|B32    |NC                 |use this pin to bring in +5V                      |
|A1     |Power In           |28V in, annode of CRB12                           |
|A2     |68302TxD1+RS485    |driven by 68302 TxD1+ &loopback                   |
|A3     |68302TxD1-RS485    |driven by 68302 TxD1- &loopback                   |
|A4     |82C55PC3           |to 82C55-19(PC3) via 1K resistor                  |
|A5     |GND                |Digital Ground                                    |
|A6     |68692RxDB+RS485    |68692 RxDB+                                       |
|A7     |68692RxDB-RS485    |68692 RxDB-                                       |
|A8     |68692TxDB+RS485    |68692 TxDB+                                       |
|A9     |68692TxDB-RS485    |68692 TxDB-                                       |
|A10    |GND                |Digital Ground                                    |
|A11    |discrete In        |Complex ckt                                       |
|A12    |discrete In        |Complex ckt                                       |
|A13    |discrete In        |Complex ckt                                       |
|A14    |discrete In        |Complex ckt                                       |
|A15    |GND                |Digital Ground                                    |
|A16    |discrete In        |Complex ckt                                       |
|A17    |discrete In        |Complex ckt                                       |
|A18    |discrete In        |Complex ckt                                       |
|A19    |discrete In        |Complex ckt                                       |
|A20    |GND                |Digital Ground                                    |
|A21    |68302PA12-RS232    |driven by 68302-68(PA12)                          |
|A22    |68302TxD3-RS232    |driven by TxD3 of 68302 part of complex network   |
|A23    |68302nRTS3-RS232   |driven by nRTS3 of 68302                          |
|A24    |68302CD3-RS232     |go to 68302-77(CD3)                               |
|A25    |GND                |Digital Ground                                    |
|A26    |discrete In        |Complex ckt                                       |
|A27    |68302nCTS3-RS232   |to 68302 nCTS3                                    |
|A28    |NC                 |                                                  |
|A29    |82C55PB0           |PB0 of 82C55                                      |
|A30    |82C55PC2           |to 82C55-18(PC2) via 1K resistor                  |
|A31    |68302TCLK3-RS232   |driven by TCLK3 of 68302 part of complex network  |
|A32    |Power In           |28V in, annode of CRB12-1                         |

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