[Coco] RS232 Pak needed

[Mark Ormond]

This pic would also be useful for other machines.
I'd love to have a modern work alike of the 6551a to use in commodore projects also.
(I've got a protoboard on my desk right now with a 6551a to interface a digiport.)



-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On Behalf Of Steve Bjork
Sent: Saturday, September 21, 2013 12:33 AM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] RS232 Pak needed

Yes, that is my point.  The Pic (Micro-controller) will handle the
Rs-232 handshaking to control the flow of data.

You could even take it up to the next level and let the Pic do the block and crc checking.  We know the data going from the CoCo to the new UART board is good.  So, let the Pic handle the the Data blocking and error checking to get the data to the other end in a new data transfer mode. 
This would be a big help for programs like Drive Wire under OS-9.

Steve

On 9/20/2013 10:13 AM, Gene Heskett wrote:
> I like what I'm hearing Steve, but because the 6551's hardware control 
> is busted, the hardware flow controls need to be completely hidden in 
> the pic code.  What currently exists in sc6551.dr is a deadlock if its 
> ever triggered.  Been there, done that, uncountable times so I have to 
> use a very restricted "window" size of 256 bytes when using the linux 
> zmodem to send a disk image to the coco with both ends set for 9600 
> baud.  The crc checking and handshaking slows it enough it just pours 
> down the pipe.  Its a very small bore pipe but it works.


--
Coco mailing list
Coco at maltedmedia.com
http://five.pairlist.net/mailman/listinfo/coco