[Coco] Stand-alone DriveWire devices.

[Boisy G. Pitre]

> Boisy, off hand, is there anything in the protocol that would require a
> sophisticated processor, ie. compute intensive portions? Does it 
> require
> 32-bit math, or will an 8-bit processor work? What's the max space
> addressable per disk with DriveWire?

A CRC needs to be computed, and that can be found in the DriveWire 
Protocol.  DriveWire V2 uses a checksum which is a bit better at 
catching errors (which are few and far between anyway), but I'm not 
sure when I'll have time to get it out.

> For that matter, it might be possible to network two CoCos through
> DriveWire...

Forget it.  DriveWire works as fast as it does on the CoCo only because 
there is something on the other end that can respond to the CoCo's 
commands at 57,600 bps.  Another CoCo couldn't respond that fast (at 
least not without some hardware hacking on the bitbanger for the server 
CoCo).  Perhaps when the SuperBoard comes out, and the 16552 serial 
chip variant is used, there may be some hope.

> There's another project on my plate. :) Unfortunately, you can't have 
> two
> DriveWire servers connected to the same CoCo.

No, but I would like to extend the server to support multiple CoCos.  
So one Mac/PC with two serial ports could in theory support two CoCo 
systems running DriveWire.

Boisy