ADFS 1.0x is for the Electron
ADFS 1.1x is PRES ADFS for the Electron with SCSI code removed to fix bugs in floppy code
ADFS 1.2x appears not to exist
ADFS 1.3x is for the BBC.
ADFS 1.4x is a patched version to use with the 6MHz 32016 CoPro
ADFS 1.5x is for the Master.

ADFS x.x0 is for a SCSI hard drive
ADFS x.x1 is for a SCSI hard drive and preserves context on Break
ADFS x.x3 is for an IDE hard drive and preserves context on Break
ADFS x.x7 is for an MMC user port hard drive and preserves context on Break
        +-> %abcd
             |||+---preserve context on break and various bugfixes
             |00----SCSI drivers
             |01----IDE drivers
             |10----reserved
             |11----User port MMC drivers
             +------reserved