[comp.sys.ibm.pc.hardware] modem help needed

dondaing@phoenix.Princeton.EDU (Don Aingworth) (01/31/91)

I have a mac modem that I would like to hook up to an ibm using the
comm port.  I know what the pins are on the ibm, but can somebody tell
me what each pin does on one of those little round mac connectors.  Does
anybody have any experience trying to do this?  Please respond using
mail, and I'll post any results.

thanks in advance,
don.
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Looking for a '286 or '386 motherboard to fit in Convertible
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robin@uhunix1.uhcc.Hawaii.Edu (Robin Amano) (02/01/91)

In article <5832@idunno.Princeton.EDU> dondaing@phoenix.Princeton.EDU (Don Aingworth) writes:
>I have a mac modem that I would like to hook up to an ibm using the
>comm port.  I know what the pins are on the ibm, but can somebody tell
>me what each pin does on one of those little round mac connectors.  Does
>anybody have any experience trying to do this?  Please respond using
>mail, and I'll post any results.
>
>thanks in advance,
>don.
                                 
                                    MAC
                          Modem and printer ports


               8   7   6            1    HSKo     Handshake out
               |   |   |            2    HSKi     Handshake in/external clk.  
               []  []  []           3    TXD-     Transmit data -
                                    4    GND      Signal Ground 
             []    []   []          5    RXD-     Receive data -
             |      |    |          6    TXD+     Transmit data +
             |   [] | [] |          7    GPi      General Purpose input* 
             |   |  |  | |          8    RXD+     Receive data +  
             5   |  4  | 3
                 |     |            * Modem port only; can be set in software 
                 2     1               to be a second external clock

      Looking at back of computer (female) 

  We normally use only 1,3,4 & 5



                            
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