Infocom V4+ nibble format (was Re: 80 Cols. In Apple II Infocom Games)

[Linards Ticmanis <ticmanis@gmx.de>]

Hello,

Speaking of the Infocom games, I wonder if anybody has already
deciphered the nibble format that they used on the back side of the disk
for the Apple versions of their V4 and later games.

It's obviously a "one giant sector per track" format, not for copy
protection (which Infocom generally did in the form of package contents
that were needed to solve the game), but for getting more bytes onto
that disk surface.

It would be nice if one could create disk images of their V4, V5 and V6
games from an interpreter and a game file just like it's possible for V3.

-- 
Linards Ticmanis