Re: ProDOS Plus

[mdj <mdj.mdj@gmail.com>]

On Jul 2, 9:42 am, pau...@saaf.se (Paul Schlyter) wrote:
> In article <1183287598.028105.187...@e9g2000prf.googlegroups.com>,
>
> mdj  <mdj....@gmail.com> wrote:
> > Yep. Sparse files is one of the more innovative concepts in ProDOS,
>
> :-)
>
> Sparse files were available already in Apple DOS 3.3 as well as in CP/M-80,
> both of which predated ProDOS.

Curious. I never saw one in DOS 3.3, and didn't do a lot with CP/M.

At one point back in my Apple Pascal days I implemented a (rather
nice) ISAM backend for database I decided to write (ostensibly, to
learn how to write databases). I had to resort to using BLOCKREAD/
BLOCKWRITE over an entire volume to implement the ISAM container :-)

The UCSD filesystem was very "sparse" on features :-)

> In MS-DOS though, sparse files had vanished - they reappeared in Windows-NT,
> if you used an NTFS rather than a FAT partition.
>
> Of course Unix supported sparse files all the time....

:-) Unix can do .... oh, nevermind :-)

Matt