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Re: VTOC



On Mar 4, 8:54 pm, "Guillaume Tello" <houten....@wanadoo.fr> wrote:
> Is the first byte of the VTOC used? Are there other values than $02?

Beneath Apple DOS (pg 4-2) states that the first byte of the VTOC is
not used.
Their sample VTOC dump has a $04 in the first byte. My *guess* is that
it may indicate what version of the VTOC structure is being used.

> Same for the IOB, is the first byte always $01?

Beneath Apple DOS (pg 6-5) states that the first byte of the IOB is a
Table Type and must be $01. Again, I think this indicates what version
of the structure is being used.

You can find Beneath Apple DOS here:
http://www.apple-iigs.info/doc/fichiers/beneathdos.pdf

Regards,
Andrew