06.008 How much storage space is on a newly INITialized 5.25" diskette?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
06.008 How much storage space is on a newly INITialized 5.25" diskette?
A standard DOS 3.3 diskette has 35 Tracks. Each Track contains 16 256-
byte Sectors. This gives 35 x 16 x 256 = 143360 bytes per side. Current
versions of DOS 3.3-- e.g. Prontodos, etc.-- use Track 0 and Track 1 plus a
sector on Track 2 for DOS; and, Track 17 is used for holding the Catalog of
files and other disk information. This leaves roughly 130k bytes per side free
for your HELLO program and other files.
By the way, when it comes to the way it is stored on-disk, DOS 3.3 is not
like the PC's MSDOS or Apple's ProDOS. DOS 3.3 is 'hidden' on reserved tracks,
mainly Tracks 0 and 1. There is no "DOS 3.3" file which will show up on a
CATALOG.
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