Fred Cisin wrote:
On Sat, 21 Oct 2006, Dave McGuire wrote:
Have you found a stash of Ampro Little Boards?
If so, please
share. :)
Sorry, I have to apologize;
I didn't realize that they had become rare.
There were at least a half a dozen different brands of miniature
motherboards in that form factor. Are they all rare now?
Will they all read / write FM density, and allow raw bit-level access to the
track data coming from the floppy drive, though? I think that's what we're
hoping for from a data imaging device...
Actually, there's perhaps three different projects that would be useful to tackle:
1) Off-the-shelf imaging box using a stock FDC chip capable of MFM and FM
(with little ability to handle faulty media)
2) Custom imaging box [ which may mean scrap PC + extras ] that does data
sampling at the drive digital interface level and reconstruction ( /
deconstruction) in software.
3) Custom imaging box which hooks to the floppy drive's heads directly and
uses a DAC / ADC; essentially as option 2 but can cope with marginal signal
levels to reconstruct data.
Option 1 I think is reasonably well covered with things like Imagedisk. Option
3 would be rather useful to a lot of us, but is a lot of work, both to design
and set up on a per-drive basis. Option 2 is more middle ground, and seems to
be within the realms of something that can be designed using a fairly low
parts count and (hopefully) built by most hobbyists.
Unless I'm completely misreading the discussion :-)
cheers
Jules