29 Apr
2013
29 Apr
'13
8:04 p.m.
Yes, it's possible to write a 360k disk in a 1.2MB
drive. See
http://www.classic-computers.org.nz/blog/2010-02-18-writing-cpm-from-1.2mb-…
Bulk-erasing before writing on a 96tpi and NOT re-writing on a 48tpi is a good tip,
and does work.
However (from the references web page):
A further tip: when writing new floppies with IMD (to
generate original Kaypro bundled
software for example), I found it easiest to Format the floppy under 22DISK first, as it
knows the correct settings for a Kaypro floppy, then use IMD to write to the formatted
floppy. Doing this meant the only setting I had to set on IMD is the Double Step (as I
have a 1.2MB (80 track) drive, not a 360KB (40 track) drive.
Makes no sense. IMD knows the exact format of the particular disk that it is writing
as this was determined at the time it was read, and is represented in the metadata
of the IMD file - it also formats the disk as it writes it, removing any previous
formatting.
And ... if he's writing on a 1.2M drive (presumed in a HD controller) , he WILL need
to
set a 250->300kbps translation in addition to double-stepping in order to write the
disks.
Dave
--
dave13 (at) Dave Dunfield
dunfield System/Firmware development services: www.dunfield.com
(dot) com Classic computers: http://www.classiccmp.org/dunfield