Date   : Mon, 15 Jul 2002 22:50:08 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: Linking a BBC to a MAC

RWAPSoftware@... wrote:
> I want to link a BBC to a MAC computer via the serial ports.  Does anyone
> know the pinouts for the leads and in particular, where I can get the din
> plug for the BBC from?? It seems to need two notches in the din plug,
whereas
> all the ones I see available nowadays only have one notch..
 
The notches are irrelavant and misleading.  As long as there's at least
one locating lug you'll be ok.
 
Having a plug with one notch is the usual situation, and it is standard
practise to align the plug so the notch is as the top as the plug can be
accidently inserted upside down.
 
I haven't got the pin numbers for the Mac end, but this is how it should
go together:
 
   /->--->--->--->--->--->--->--->--->--->--->--->--->--- CTS
   |           notch
   \-<--- RTS  5   4 RxD ---<---<---<---<---<---<---<---  TxD
  
                 1 GND ---------------------------------- GND
  
   /->--- CTS  2   3 TxD --->--->--->--->--->--->--->---  RxD
   |
   \->--->--->--->--->--->--->--->--->--->--->--->--->--- RTS
 
              view of
             plug when
            wiring pins
 
-- 
J.G.Harston (JGH BBC PD Library) 70 Camm Street, Walkley, SHEFFIELD S6 3TR
jgh@...                - Running on BBCs & Masters with SJ MDFS FileServer
Z80+6502/CoPro+Tubes/Econet+SJ - - - - - - - http://www.mdfs.net/User/JGH/
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