Re: IIc serial port pin out

[John Bastin <jbastin@delphi.com>]

Smith S. Charles <scsmith> <scsmith@apgea.army.mil> writes:
 
>just make one to do the job.  I have search the documentation I have
>for the machine, and none of it seems to have a description of the
>serial pins.
>
>	If you know what these pins do, please send email.  If there
>is enough interest I will post a summary.
 
The serial connector on the //c is as follows:
 
Pin 1: RTS
Pin 2: TXD
Pin 3: Ground
Pin 4: RXD
Pin 5: DCD
 
For connecting to a printer or a modem:
 
FROM		TO
DIN-5 signal    Modem (DCE)      Printer (DTE)
-----------------------------------------------
RTS (pin 1)     DTR (pin 20)     DSR (pin 6)
RXD (pin 3)
GND (pin 3)     GND (pin 7)      GND (pin 7)
RXD (pin 4)     RXD (pin 3)      TXD (pin 2)
DCD (pin 5)     DSR (pin 6)      DTR (pin 20)
 
NOTE: Pin numbers given for DCE and DTE refer to pins on the
      DB-25 connector defined by the RS-232-C standard.
 
  J o h n   B a s t i n   Internet: jbastin@delphi.com
       WB8KKI      FIDO: 1:2440/90    aq133@cleveland.freenet.edu