mac serial pinouts

From: Mike Ford <mikeford_at_socal.rr.com>
Date: Thu Oct 5 14:39:53 2000

>Can anyone tell me which pins (and I don't know the numbering scheme, so
>please include that) are transmit, receive, and gnd on a Mac 8-pin
>mini-din port?

This apparently from the Zterm 0.9 manual

      Mac Modem
     DIN-8 DB-25
  ============ =================
  1 (HSKout) ---> 4 (RTS) & 20 (DTR)
  2 (HSKin) <--- 5 (CTS)
  3 (TxD-) ---> 2 (TxD)
  4 (GND) <--> 7 (Signal Ground)
  5 (RxD-) <--- 3 (RxD)
  6 (TxD+) ---- NONE
  7 (GPi) <--- 8 (DCD)
  8 (RxD+) <--- 7 (Gnd)

Pin numbering (looking at the end of the plugs) is:

      Mac Modem
     DIN-8 DB-25
  ============ =================
   6 7 8 1 ---------> 13
  3 4 5 14 ------> 25
    1 2

Note that Pins 4 =and= 20 on the DB-25 side are to be connected to Pin 1 on
the DIN-8 side.
Received on Thu Oct 05 2000 - 14:39:53 BST