Package org.applecommander.os.rdos

package org.applecommander.os.rdos

RDOS by Roland Gustafsson

Disks are identified by looking for the catalog header. It is consistent across versions, except that 2.1 is all high-ASCII while 3.3 is low-ASCII. If the header is on track 0, it's 3.3 while track 1 is 2.1. We know what sector the catalog exists on and from that the sector skew can be interpolated.

Version Directory &CAT Sectors/Track Sector Ordering
RDOS 2.1 13..23 25 13 Nibble/Physical
RDOS 3.3 16..31 1 16 ProDOS/Pascal

References: