Archiving 8" RT-11 floppies to CD-ROM?

[Chuck Guzis]

On 25 Feb 2009 at 14:12, Ethan Dicks wrote:

> On Wed, Feb 25, 2009 at 1:36 PM, F.J. Kraan <fjkraan at xs4all.nl> wrote:
> > Just recently I was able to read my MiniMINC (a PDT-150) floppies with an 8"
> > drive connected to an AHA1542B (capable of single density) with Dave
> > Dunfields ImageDisk.
> 
> Good to know.  I have at least one 1542B running around, and an old
> DOS box I can use to stuff it all into.

Depending on chipset, many modern PCs can handle single-density just 
fine--no need for a separate controller.  There are lots of old ISA 
cards with floppy controllers out there than can handle single 
density, not just the 1542--basically anything with a WD37C65, 
National 8473/8477 will work--and there are others.

But if we're talking about RX02-style double-density media, nothing 
short of a Catweasel is going to help.  The RX02 double-density 
format is DEC-unique, essentially FM sector headers with MFM data--
and funny MFM at that, with codes selected not to conflict with those 
used as AMs in FM data.

Tim Mann has a package that works well with the Catweasel.

A Tandon 848 should be fine in any case.

Cheers,
Chuck