From: B Degnan (billdeg_at_degnanco.com)
Date: 2006-12-29 17:02:39
I rarely have trouble formatting and using regular "48" disks on an 8050/sfd-1001. I have some original software that was manufactured for 8050 drives, I will check whether tracks/in is indicated, I don't expect any label on the disk to indicate tracks/p/inch. I don't have the original sfd-1001 or 8250 test diskette. This would be the best disk to determine what CBM intended to be used with the drive. I don't have one in front of me now, but I don't believe that CBM diskettes have the TPI printed on the labels. Bill > On Fri 2006-12-29 06:00, William Levak wrote: > >> Quad Density and High Density are both 96 tpi. > > The biggest question is whether any floppy disk manufacturer ever > sold 5.25" floppy disks labeled QD, or if it is a designation > invented by the users. Up to now, the handful brands I've seen > are labeled 96 tpi DD or something similar (or 100 tpi in case > of PET-DISK). > > By the way, the mechanism in 8050/8250 and I suppose SFD-1001 is > referred to as a 100 tpi drive that formats 77 tracks. Sometimes > it is said that only true 100 tpi floppies are known to work 100% > in those drives, and that a 96 tpi DD floppy probably is a better > substitute than a 48 tpi DD but not all the way. Is this true, and > did any other brand than Commodore/PET themselves label their > floppies as 100/77 tpi? > > (Hmm.. cross-list posting by William. Is that desired?) > > -- > Anders Carlsson > > Message was sent through the cbm-hackers mailing list > -END- Message was sent through the cbm-hackers mailing list
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