Looking for AT&T 3B1/UNIXPC/PC7300 software

[Chuck Guzis]

On 12 Oct 2008 at 6:50, Dave Dunfield wrote:

> >  > Does it fail to see any sectors at all?
> > 
> > Correct. I haven't tried a catweasel on it yet to see
> > what the details of the sectors are.
> 
> Then most likely there is some other factor in the 8-sector format
> which makes it incompatible with the PC disk controller...

Given (a) that these are 48 tpi 5.25" DD diskettes and (b) that the 
3B1 uses a WD2797 at standard data rates, you should *at least* see 
returns from a Read ID operation.  ISTR that while the 2797 could 
format using a variety of DAMs, there's only one recognized MFM IDAM  
and it must be preceded by three A1s to be recognized reliably.

If you're not seeing at least the address headers, it doesn't look 
good.

Cheers,
Chuck