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1988-02-09
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Acache v 1.1 is a disk cache program for the Atari ST that keeps 16 floppy disk
sectors in memory. Only drive A: is cached. Acache is write-through; all disk
write requests are immediately written to the floppy.
In order to keep the number of cached sectors low and memory requirements
reasonable, only requests for ONE sector are cached. This results in caching
FAT sectors, root directory, subdirectories and small files, and prevents the
cache being flushed after e.g. loading a large program.
The effects of acache are noticeable but not spectacular. Copying files from
floppy to ram disk is some 10-20% faster, depending on size of course. Perhaps
a greater advantage is that acache saves on disk drive head movements, making
the sound of the drive less obtrusive and reducing wear.
Installation:
Put acache.prg in the AUTO folder of your disks. If you also have a ram disk in
the AUTO folder, start with an empty AUTO, first put your ram disk program in,
then acache.prg, then any other programs.
Acknowledgements:
Acache was inspired by scache, written by Moshe Braner (batcomputer!braner).
Disclaimer:
Although I have used acache for several months without encountering apparent
bugs, I make no explicit or implied warranty with respect to this program.
Use at your own risk!
Bug reports and suggestions for improvements are welcome.
Harm Jetten
..!ihnp4!hvlpa!hjetten
AT&T and Philips Telecommunications
Hilversum, the Netherlands