Re: Decoding kryoflux stream for HP9895A

2016-09-25 Thread Al Kossow
OK, I'll see what I can do. You left some Intel floppies of them out here, and I've got some Amigo OS disks that are pretty important to image. Guess I need to get the Diskferret set up ;-) On 9/25/16 5:34 PM, Eric Smith wrote: > On Sun, Sep 25, 2016 at 6:25 PM, Al Kossow

Re: Decoding kryoflux stream for HP9895A

2016-09-25 Thread Eric Smith
On Sun, Sep 25, 2016 at 6:25 PM, Al Kossow wrote: > Is it doing better on Intel M2FM now? No, but since it had no trouble with the HP M2FM, I'm starting to think that perhaps my PLL code is OK and the drive used to read those Intel disks might have been suboptimal. I need

Re: Decoding kryoflux stream for HP9895A

2016-09-25 Thread Al Kossow
Is it doing better on Intel M2FM now? On 9/25/16 4:48 PM, Eric Smith wrote: > fluxtoimd now successfully decodes HP M2FM double-density floppy > format, as used by the HP 7902, 9885, and 9895, from either DiscFerret > images or ZIP files of KryoFlux stream files. > >

Re: Decoding kryoflux stream for HP9895A

2016-09-25 Thread Eric Smith
fluxtoimd now successfully decodes HP M2FM double-density floppy format, as used by the HP 7902, 9885, and 9895, from either DiscFerret images or ZIP files of KryoFlux stream files. https://github.com/brouhaha/fluxtoimd

Re: Decoding kryoflux stream for HP9895A

2016-09-25 Thread Eric Smith
On Tue, Sep 20, 2016 at 7:42 AM, Denise de Vries wrote: > Does anyone know of documentation for the HP9895A format with its own M2FM > encoding? > I have a kryoflux preservation stream but so far can make no sense of it. On Wed, Sep 21, 2016 at 12:59 AM,

Re: Decoding kryoflux stream for HP9895A

2016-09-21 Thread Eric Smith
On Wed, Sep 21, 2016 at 12:59 AM, Christian Corti wrote: > I've already written a decoder for the HP 9885/9895 format. Denise already > sent me his image, but I haven't had the time to try decoding it yet... I'd still like to get a 9885/9895/7902 M2FM

Re: Decoding kryoflux stream for HP9895A

2016-09-21 Thread Eric Smith
On Wed, Sep 21, 2016 at 11:19 AM, Al Kossow wrote: > I wonder if this is the same format the Amigo used? The Amigo used the 7902A floppy drive, which supports the same formats as the 9895A. This includes HP M2FM, single or double-sided, and IBM 3740 FM single-sided

Re: Decoding kryoflux stream for HP9895A

2016-09-21 Thread Al Kossow
HP300 On 9/21/16 10:24 AM, tony duell wrote: > [HP9895 format deleted] > >> I wonder if this is the same format the Amigo used? > > Which was the Amigo? > > FWIW every 5.25" and 3.5" HP drive unit that I've seen (and the > internal drives on the 9826 and 9836) use a Western Digital or >

RE: Decoding kryoflux stream for HP9895A

2016-09-21 Thread tony duell
[HP9895 format deleted] > I wonder if this is the same format the Amigo used? Which was the Amigo? FWIW every 5.25" and 3.5" HP drive unit that I've seen (and the internal drives on the 9826 and 9836) use a Western Digital or compatible disk controller chip. The low-level format (sync bytes,

Re: Decoding kryoflux stream for HP9895A

2016-09-21 Thread Al Kossow
On 9/20/16 11:59 PM, Christian Corti wrote: > Here's a rough sketchup of what my decoder does: > > - Find the sync pattern (several 0x55) > - Swap the bits in each byte (i.e. MSB<-->LSB) > - Look for an address mark (clock pattern always 0x0E) > - 0x70: ID address mark > Calculate CRC16

Re: Decoding kryoflux stream for HP9895A

2016-09-21 Thread Christian Corti
On Tue, 20 Sep 2016, Eric Smith wrote: On Tue, Sep 20, 2016 at 7:42 AM, Denise de Vries wrote: Does anyone know of documentation for the HP9895A format with its own M2FM encoding? I have a kryoflux preservation stream but so far can make no sense of it. I've

Re: Decoding kryoflux stream for HP9895A

2016-09-20 Thread Eric Smith
On Tue, Sep 20, 2016 at 7:42 AM, Denise de Vries wrote: > Does anyone know of documentation for the HP9895A format with its own M2FM > encoding? > I have a kryoflux preservation stream but so far can make no sense of it. I've successfully decoded Intel M2FM