[Coco] Source code for High Speed Bit-Banger I/O

[coco at yourdvd.net]

Okay, now that's the first laugh I've had in days....

> -------- Original Message --------
> Subject: Re: [Coco] Source code for High Speed Bit-Banger I/O
> From: David Roper <dave at ebonhost.com>
> Date: Fri, April 27, 2007 2:33 am
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> 
> I detect an element of my "9-pin male plug is larger than your 9-pin 
> male plug" going on here...
> 
> Kind Regards,
> 
> David Roper
> 
> -------------------------------------------------------------------------
> *My Graphic Garden / Ebonhost*
> *website:* www.mygraphicgarden.com.au
> *phone:* (02) 4268 5934
> *fax:* (02) 4268 6456
> *mail:* po box 624 thirroul, nsw 2515
> *email:* dave at ebonhost.com
> -------------------------------------------------------------------------
> *Legal: The information contained in this email communication, and any 
> attachments, is confidential.
> Please don't distribute, copy or quote. If you have received this 
> communication in error, please notify
> customerservice at mygraphicgarden.com.au immediately.*
> 
> 
> Roger Taylor wrote:
> > At 07:42 PM 4/26/2007, you wrote:
> > The speed increase, interleaved checksum, framing error detection, 
> > variable request count and termination due to a pause in the 
> > transmission were all my own enhancements.
> >
> >> I tested both the 57600 and the 115.2K operation on a CoCo 3 
> >> connected to my PowerMac G4 through a KeySpan High-Speed Serial 
> >> adapter and the serial cable I bought from you. All my tests worked 
> >> flawlessly (I have transferred whole disk images both ways without 
> >> any data corruption).
> >>
> >> Darren
> >
> >
> > Good job, then.  If it works, then I guess I can't claim to be the 
> > only one who made it possible.  :)
> >
> > Now, my own 115.2k model definately uses some strikingly similar areas 
> > of the code you posted, but then I adapted it from the comm source as 
> > well.  The 16,15,16,15,16,15,16,15 cycle timing is really the only way 
> > to do it for syncing the received bits, so that part is a given no 
> > matter how you code it.  :)
> >
> > However, my model and protocol was designed to work in a 
> > background-driven environment.  The CoCo can literally sit there with 
> > a flashing cursor and talk to a PC at 115200 bps with nothing missed!  
> > This is on a CoCo 1, 2, or 3 and no GIME or IRQ/FIRQ involved!  What 
> > about a PC running at 3ghz and well enough capable of transmitting too 
> > quick while the CoCo is possibly executing a slow 1 or 2mhz 
> > instruction.  Solved!  :)
> >
> >
> >
> >
> 
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco