Re: Please help with //c to IBM PC connection

["Gus Vilomar" <gvilomar@bellsouth.net>]

I was checking out Apple Oasis for Windows and I found the following text in
the help section.  I hope this helps.

Null Modem (Modem Eliminator)



The null modem connection is a short cable and two connectors. The standard
serial connectors are DB-25 and DB-9. Following are their pin descriptions:

DB-9 Connector

    Pin   Signal                   Pin  Signal
-------------------------------------------------------------------
     1    CD   Carrier Detect       6   DSR  Data Set Ready
     2    RXD  Receive Data         7   RTS  Request to Send
     3    TXD  Transmit Data        8   CTS  Clear to Send
     4    DTR  Data Term. Ready     9   RI   Ring Indicator
     5    GND  Signal GND


DB-25 Connector

    Pin   Signal                   Pin  Signal
-------------------------------------------------------------------
     1    GND  Ground / Shield     14        {2nd TXD}
     2    TXD  Transmit Data       15        Transmit Clock
     3    RXD  Received Data       16        {2nd Rec. Clock}

     4    RTS  Request to Send     17        {Receive Clock}
     5    CTS  Clear to Send       18        {Unassigned}
     6    DSR  Data Set Ready      19        {2nd RTS}
     7    GND  Ground              20   DTR  Data Term Ready
     8    DCD  Carrier Detect      21        {Sig. Quality}
     9         {Reserved}          22   RI   Ring Indicator
    10         {Reserved}          23        {Data Rate Sel.}
    11         {Unassigned}        24        {Transmit Clock}
    12         {2nd CD}            25        {Unassigned}
    13         {2nd CTS}


Here is the Null Modem connection:


PC  (DB-9)                   Apple*(DB-25)

 RxD (2) ---------------------- TxD (2)
 TxD (3) ---------------------- RxD (3)
 GND (5) ---------------------- GND (7)

 RTS (7) --\                /-- RTS (4)
 CTS (8) --/                \-- CTS (5)

 CD  (1) --\                /-- DSR (6)
 DSR (6) --+                +-- DTR (20)
 DTR (4) --/                \-- CD  (8)


* For Super Serial Card (SSC) put the TERMINAL/MODEM jumper pointing up at
'MODEM'.




<armagon@my-deja.com> wrote in message news:7tjd1g$ije$1@nnrp1.deja.com...
> Howdy.
>
> I'm working on a null modem connection between my apple file://c computer
and
>  a Win95 Machine.  I'm trying to do this cheaply and hope I can avoid
> expenses to get other cables.
>
> I have done my homework.  Downloaded onto my harddrive is the csa2 FAQ
> regarding null modems and the page on various ports and connectors.  (I
> can find URLs for these pages if it'll help ppl.)  I have ADT on my
> harddrive just waiting to be used.  I found a portinfo program that told
> me IRQs and weird and wonderful things for my COM ports.  My continuity
> tester and multimeter is ready...
>
> I have even created a null-modem cable that successfully connected two
> apple file://c computers.
>
> What do I need to do to connect the DIN-5 from the apple file://c (port 2)
to
> a DB-9 COM port on my computer?  If someone can send me the actually
> wiring--ie. which pin goes to which pin--so I can hook it up I'd
> appreciate it.
>
> Also, what terminal program can be recommended for the IBM to transfer
> ADT.DMP?  To send and recive text? To capture printed data?  To
> communicate without a protocall?  (and with one when I have everything
> figured out)  (Sheesh!)  I have been unable to find one and have very
> few notions as to how to program one.
>
> Thanks for all help you can offer me.
> Armagon
>
>
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.