Archiving 8" RT-11 floppies to CD-ROM?
cclist at sydex.com
Wed Feb 25 13:34:34 CST 2009
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.
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