[Coco] RS-232 Cable

[Mark Mellor]

Bob,

I got it to work with another cable.  I have an original CoCo cable that has
a DB25 connector on it.  Then I hooked up a null modem, then a DB25 to DB9
connector, and then a straight RS-232 cable to the PC.  I think the problem
was pin 1 on the CoCo should go to pin 1 on the DB9 and not pin 4.

Regards,
Mark

----- Original Message ----- 
From: "Mark Mellor" <markmbm at jps.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Sunday, November 12, 2006 4:49 AM
Subject: Re: [Coco] RS-232 Cable


> Bob,
>
> Thanks for the information.  It still doesn't work but I am probably doing
> something wrong.  I am using a 25 feet serial cable.  Could it be too
long?
> I am using Autoterm by PXE Computing.  I was able to send and receive AT
> commands to a Hayes compatible modem (different cable).  I was able to do
a
> modem to modem direct connect but it only worked one way for some reason.
> Is there a way to send and receive via the RS-232 in BASIC (CoCo)?  Or do
> you have to do it in assembly?
>
> Regards,
> Mark
>
> ----- Original Message ----- 
> From: "Bob Devries" <devries.bob at gmail.com>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Sunday, November 12, 2006 3:04 AM
> Subject: Re: [Coco] RS-232 Cable
>
>
> > Mark, the connections are correct, but, in addition, you need to connect
> > pins 1 and 6 together at the PC end, and 7 and 8 together at the PC end.
> > This is to simulate handshaking which the PC needs.
> > --
> > Regards, Bob Devries, Dalby, Queensland, Australia
> >
> > Isaiah 50:4 The sovereign Lord has given me
> > the capacity to be his spokesman,
> > so that I know how to help the weary.
> >
> > website: http://www.home.gil.com.au/~bdevasl
> > my blog: http://bdevries.invigorated.org/
> >
> > ----- Original Message ----- 
> > From: "Mark Mellor" <markmbm at jps.net>
> > To: <coco at maltedmedia.com>
> > Sent: Sunday, November 12, 2006 8:51 PM
> > Subject: [Coco] RS-232 Cable
> >
> >
> > How do you make a RS-232 cable to connect to a PC?  Here's how I did it
> (not
> > working):
> >
> > Coco RS-232 pin                        PC RS-232 (DB9 connector) pin
> > ====================================================
> > 1 Carrier Detect/Ready          4 Data Terminal Ready
> > 2 Data In                                      3 Transmit Data
> > 3 Ground                                     5 Ground
> > 4 Data Out                                  2 Receive Data
> >
> > I then disconnected 1 and 4 thinking maybe they weren't needed.
> >
> > Mark Mellor
> >
> > -- 
> > Coco mailing list
> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco
> >
> >
> > -- 
> > Coco mailing list
> > Coco at maltedmedia.com
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>
>
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