18 Mar
2012
18 Mar
'12
7:41 a.m.
I wrote:
At my request about two weeks ago, Dave added support
for mixed sector
sizes to the Imagedisk file format specification, so as a container
format it will work fine. However, he did not add support to the
Imagedisk program, because a 765/8272-style FDC apparently can't
format a track with mixed sector sizes.
Chuck Guzis wrote:
Oh, sure it can. Witness the IBM XDF format floppies
and the programs
that can format and write them. You just have to be a little clever is
all. --Chuck
I think I know how to format with the last sector on a track different
than the others, which is what Al would need for the HP discs, though I
haven't actually tried it. I have no idea how one might reliably get
any other mix of sector sizes on the same track when using a
765/8272-style FDC.
A Google search didn't turn up any substantive details of the XDF format.