KPR wrote:
David dos or pronto dos ( one of them ) supported 40 tracks.. then there was the trick to format a data disk and recoup the first 3 tracks by not putting a dos image on it.. 40 Tracks * 16 Sectors per track = 640 sectors - boot sector and catalog track ( 17 sectors ) = 623 Sectors = 155.75k.. that sure beat the 128k of usable space per dos formattted disk..
And the only cost was the loss of interchangeability with the rest of the world... ;-) "Being standard is better than being better." -michael NadaNet networking for Apple II computers! Home page: http://members.aol.com/MJMahon/ "The wastebasket is our most important design tool--and it's seriously underused."