NAME

       diskdefs - CP/M disk and file system format definitions

DESCRIPTION

       The  diskdefs  file  contains  CP/M  format descriptions, because CP/M in general does not
       store those in the file system and there are no standards of any kind.

       A diskdefs file consists of one or more entries of the format:

              diskdef name
                seclen size
                tracks count
                sectrk count
                blocksize size
                maxdir count
                [dirblks count]
                boottrk number
                [bootsec number]
                [skew number]
                [skewtab sector[,sector]...]
                [os 2.2|3|isx|p2dos|zsys]
                [offset size]
                [logicalextents count]
                [libdsk:format name]
              end

       skew and skewtab must only be used exclusively.

       Comments are marked with a leading hash or semicolon and extend to the end of the line.

       It is possible to reserve space after the directory beyond maxdir using  an  inflated  DPB
       ALV0.  If the format makes use of that, dirblks must be set.

       bootsec  contains  the  total  number  of sectors used by the boot area.  This is for CP/M
       systems that map multiple logical tracks onto a physical track. While raw disk images  can
       be  configured  for  doing  the same, accessing libdsk images needs to be done by physical
       tracks.

SEE ALSO

       cpm(5)