MFMulation? (Solid-state replacements for MFM drives)

On 15 Apr 2007 at 19:36, David Comley wrote: Since, as in floppies, you're dealing with raw (unseparated ) data at 5MHz or thereabouts, recording bit transitions is out of the question. So you'd need some circuitry to both interpret and to synthesize not only bits but the various address headers and CRCs. IIRC, there wasn't a huge amount of interchangeability between the various controller vendors, so you'd need several (selectable) routines to handle that. Then there's the matter of RLL and ARLL-- and synthesizing CRC or ECC results. It looks pretty daunting to me at first blush, but maybe it's doable inexpensively. Personally, if I had a CP'/M machine, I'd simply work up an adapter to interface directly to a Flash card and modify the driver software. Just thinking aloud... Cheers, Chuck