[Coco] RS232 Pak needed

[Gene Heskett]

On Saturday 21 September 2013 02:41:58 Steve Bjork did opine:

> 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

So we both understand the problem and the direction the solution should 
take.  So now I need the eagle files to make the proto boards.  And I have 
zip knowledge of pic code, so I would rather stick to carving the hardware.  
That I can do, with an elapsed time of about 30 minutes per square inch of 
board/side, my spindle is too slow to move any faster.
 
I, like everyone else here, downloaded Little Johns 8 slot MPI replacement 
design, but haven't tried to load it up and error check it as I don't think 
my free unregistered eagle version could handle a board that big.  Has 
anyone else tried?

> 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


Cheers, Gene
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
My web page: <http://gene.homelinux.net:6309/gene> should be up!

A year spent in artificial intelligence is enough to make one believe in 
God.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
         law-abiding citizens.