26 Jun
2012
26 Jun
'12
4:40 p.m.
On Tue, 26 Jun 2012, Chuck Guzis wrote:
On 26 Jun 2012 at 9:43, Al Kossow wrote:
Instead of tying in at the MFM signal level, why not replace the drive
controller chip with something that looks like it at the register level?
Granted it's not a universal solution, but the common WD and NEC
controllers seem like candidates.
I exchanged e-mail with someone who was thinking in that direction a while
ago. Probably time to dig that up.
Steve
--
Seagate half height 5" is well past its use
by date. These are really
needed for 8" Quantum 20x0 replacements. Q2080's were marginal 15
years ago. I don't think I have any that are left working in my Xerox
8010s.
I'm prototyping an MFM drive eliminator as we speak. It takes quite
a bit more horsepower than a floppy simulator--but modern
microcontrollers are up to the task. The current design is for 5MHz
data clocks (standard MFM); maybe RLL (7.5MHz) later.