NEC APC

From: Don Maslin <donm_at_cts.com>
Date: Fri Dec 26 16:55:58 1997

On Wed, 24 Dec 1997, Don Maslin wrote:

Hello Charlie,
  
> Charlie, I have the information on that and will dig it out in the next
> couple days if no one beats me to it. Jog my memory if I seem to forget.

Here it is. Hope this answers your questions.
                                                 - don

    donm_at_cts.com
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
    Don Maslin - Keeper of the Dina-SIG CP/M System Disk Archives
         Chairman, Dina-SIG of the San Diego Computer Society
       Clinging tenaciously to the trailing edge of technology.
         Sysop - Elephant's Graveyard (CP/M) - 619-454-8412
*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*--*
        see old system support at http://www.psyber.com/~tcj

-------------- next part --------------


                             Table 2-6

              Parallel Printer Connection Pin Assignments





                    Pin # Pin # Pin #

           Signal at A at B at C Remarks

      ----------------------------------------------------------------

      DATA-STB 1 3 2

      ----------------------------------------------------------------

      DATA1 2 6 16

      DATA2 3 7 4

      DATA3 4 8 17

      DATA4 5 9 5

      DATA5 6 10 18

      DATA6 7 11 6

      DATA7 8 12 19

      DATA8 9 13 7

      ----------------------------------------------------------------

      ACK 10 2 14

      ----------------------------------------------------------------

      Input Busy 11 22 9

      ----------------------------------------------------------------

      PE 12 29 25

      ---------------------------------------------------------------

      SELECT 13 4 15

      ----------------------------------------------------------------

      Signal Grnd 14 NC NC

      ---------------------------------------------------------------

      NC 15 NC NC

      ---------------------------------------------------------------

      Signal Grnd 16 NC NC

      ----------------------------------------------------------------

      Chassis Grnd 17 NC NC

      ----------------------------------------------------------------

      +5VDC 18 27 24

      ----------------------------------------------------------------

      Grnd Pin 1 19 NC NC

      Grnd Pin 2 20 20 8

      Grnd Pin 3 21 21 21

      Grnd Pin 4 22 5 3

      Grnd Pin 5 23 24 10

      Grnd Pin 6 24 26 11

      Grnd Pin 7 25 28 12

      Grnd Pin 8 26 30 13

      Grnd Pin 9 27 31 26

      Grnd Pin 10 28 NC

      Grnd Pin 11 29 NC

      Grnd Pin 12 30 NC

      ---------------------------------------------------------------

      Input Prime 31 23 22

      ---------------------------------------------------------------

      Fault 32 25 23

      ---------------------------------------------------------------

      Signal Grnd 33 NC NC

      ---------------------------------------------------------------

      NC 34 NC NC

      ---------------------------------------------------------------

      NC 35 18

      ---------------------------------------------------------------

      Input Busy 36 NC NC

      ---------------------------------------------------------------

                             19 20 No Signal

      ---------------------------------------------------------------

                              1 1 No Signal

      ---------------------------------------------------------------





NOTE: 'A' is at the Printer connector

      'B' is at the back panel connector - marked PTR

      'C' is at the processor board header



                             Table 2-11

                      Keyboard Interface Lines



                        PIN SIGNAL

                      ---------------------------------

                          1 Not used

                          2 Not used

                          3 Keyboard Data 1

                          4 Keyboard Data 2

                          5 Keyboard Data 3

                          6 Keyboard Data 4

                          7 Keyboard Data 5

                          8 Keyboard Data 6

                          9 Keyboard Data 7

                         10 Keyboard Data 8

                         11 Signal Ground

                         12 Data Strobe

                         13 Signal Ground

                         14 Not used

                         15 Not used

                         16 Switch Strobe

                         17 Not used

                         18 Not used

                         19 Debug

                         20 Signal Ground

                         21 Signal Ground

                         22 Signal Ground

                         23 +5VDC

                         24 +5VDC

                         25 Not used

                         26 Not used





                             Table 3-20

               Serial I/O Connectors Pin Assignments





                    Pin # Pin # Pin #

           Signal at A at B at C Remarks

      -----------------------------------------------------------------

      Frame Ground 1 1 1

          SD 2 2 3 Send Data

          RD 3 3 5 Receive Data

          RS 4 4 7 Request to Send

          CS 5 5 9 Clear to Send

          DR 5 5 11 Data Set Ready

      Signal Ground 7 7 13

          CD 8 8 15

      ---------------------------------------------------

                      9 9 17 No Signal

                      10 10 19

                      11 11 21

                      12 12 23

                      13 13 25

                      14 19 2

      ---------------------------------------------------

         ST2 15 20 4 Transmit Clock (TxC)

      ---------------------------------------------------

                      16 21 6

      ---------------------------------------------------

         RT 17 22 8 Receive Clock

      ---------------------------------------------------

                      18 23 10

                      19 24 12 No Signal

      ---------------------------------------------------

         ER 20 25 14 Data Terminal Ready

      ---------------------------------------------------

                      21 26 16

                      22 27 18 No Signal

                      23 28 20

      ---------------------------------------------------

         ST1 24 29 22 Transmit Clock (RxC)

      ---------------------------------------------------

                      25 30 24 No Signal

      ---------------------------------------------------



NOTE: 'A' is at the modem connector

      'B' is at the back panel connector - marked COMM

      'C' is at the processor board header






Received on Fri Dec 26 1997 - 16:55:58 GMT

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