[Coco] A CoCo 3 Hard Drive System

[Steven Hirsch]

On Tue, 27 Jan 2015, Dave Wade wrote:

> Its also possible its ROM is hard coded with the geometry of the 
> Miniscribe drive. The Atari had a Geometry table in a file you could 
> update.

The geometry is baked into the EPROM.  I used one of these to bridge my 
Apple 2e to a hard drive and recall having to patch the code (and 
recalculate the checksum byte).

I'm pretty sure only the later Adaptec ACB-4xxx bridge boards persisted 
geometry details on the drive itself (first cylinder was set aside for 
this purpose)



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