these RTL or what?
cclist at sydex.com
Sun Oct 7 19:46:17 CDT 2007
On 7 Oct 2007 at 19:28, Tim Shoppa wrote:
> Now, IBM 3740 floppy format (from which almost all modern floppy
> formats have descended) has a lot of 8-bitness in it. But it
> was still used by 12-bit machines (with various packing/repacking).
> There's a whole lot of crap in the IBM 3740 floppy format that
> nobody has used for decades but is still carried around, too. (e.g.
> "deleted data" marks).
...and if you check some IBM 3741 floppies, you'll find that only the
first 80 characters of each 128 character sector was used on most
systems (128 characters was a maximum and many installations elected
to retain their 80-column card format).
Since the 3741-created diskettes held roughly a box of cards, how
else would you delete a card, except to use a "deleted data mark"?
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