Date   : Mon, 16 Dec 1985 09:57:59-PST
From   : Ted Shapin <BEC.SHAPIN@USC-ECL.ARPA>
Subject: Re: 5.25" disk format (Ampro)

SPT: 28H SECTORS/TRACK
BSH: 04H BLK SHIFT
BLM: 0FH BLK MASK
EXM: 01H EXTENT MASK
DSM: 00C2H DISK SIZE-1
DRM: 007FH DIR ENTRIES-1
ASV0: C0H DIR GROUP ALLOCATION 0
ALV1: 00H DIR GROUP ALLOCATION 1
CKS: 0020H CHECK SIZE
OFF: 002H OFFSET (NUMBER OF RESERVED TRACKS)