> In general it's not the drive but the controller that controls whether > the format is FM or MFM. Many PC controllers can do both FM and/or MFM > no problem; in fact, some formats use both on the same disk.
That is why Kyroflux and Superboard Pro work. They are the drive controller and micro-step across the disk surface copying the flux density map from an original disk to another disk. In theory they should work for even disks that are manufactured with copy protection schemes that 'damage' a block on the disk or disks with non-standard formatting. Jeff -----Original Message----- From: M100 <[email protected]> On Behalf Of John Gardner Sent: Wednesday, May 30, 2018 12:45 PM To: [email protected] Subject: Re: [M100] TPDD Utility Disk Is Catweasel still around? On 5/30/18, Mike Stein <[email protected]> wrote: > In general it's not the drive but the controller that controls whether > the format is FM or MFM. Many PC controllers can do both FM and/or MFM > no problem; in fact, some formats use both on the same disk. > > I don't see any fundamental reason why you couldn't read/write a TPDD > disk on a 'standard' PC drive but I don't have a drive or disks to try. > > m
