On Wed, May 2, 2012 at 4:55 AM, didier derny <firstname.lastname@example.org> wrote: > Le 02/05/2012 07:50, Baltissen a écrit : > >> - ROM from a 1591 disk drive - the high density 1581 - heard prototype >> was thrown away :( >> >> To be honest, I haven't an idea what hardware is needed to run a 1.44 MB >> drive at all... > > it may be a problem of speed, on a standard floppy 3 1/2 floppy as far as I > can remember, we have 13 or 14 microseconds > to transfer the data. with a HD it's probably faster and probably why a dma > is needed. Would Commodore have used same the half-rotation-speed high-density drive that they used in the Amiga, the Chinon FZ-357A? You'd still need a larger buffer to hold the longer track, but the data rate would be identical. They already had the drive on hand; no additional engineering required. -ethan Message was sent through the cbm-hackers mailing listReceived on 2012-05-02 16:00:05
Archive generated by hypermail 2.2.0.