[Coco] Re: archive posted - PC<->CoCo RS232 info

[Robert Emery]

--- "John E. Malmberg" <wb8tyw at qsl.net> wrote:
> > maintain the information. I saved what I could and have finally got it all
> > updated and posted to my geocities account. Here's the link:
> > 
> > http://www.geocities.com/theother_bob/PaulDpages/index.html
> 
> I have a problem with the information on the pages, as the COCO bit 
> banger port has 3 signal lines and a ground.
> 
> It has a read data, xmit data, DCD/CTS/DSR connection and a signal ground.
> 
> The ROM routines require a the signal line DCD/CTS/DSR line to be 
> asserted, or they would only output one character, and the internal 
> DLOAD command reads off of the read signal.
><snip> 
> I would have to dig up my COCO documentation to see what line has been 
> left off.  My guess is that these arrangements are using the DCD/CTS/DSR 
> line as the received data line.

I haven't tried building these cables yet, but I am working in that direction.
Currently I'm making a cable to connect to an external modem... then my plans
for world dominatio... I mean, uh... if I can get this modem working, I plan to
offer a CoCo dial-up connection (not quite a bbs) for distributing files to
other modem equipped CoCos... to assist those having file-transfer
difficulties.

Anyway, it looks like the CD line at the CoCo end is the one left hanging. I
have another diagram for connecting to a modem which shows CD connected to pins
20, 6 and 8 of a db25.

Bob Emery


	
		
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