3 Nov
2013
3 Nov
'13
2:12 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Chuck Guzis
Sent: 03 November 2013 19:08
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Looking for a MicroController Recommedation
On 11/03/2013 10:14 AM, Dave wrote:
So, according to the manual I have, the data rate is 5megabits/sec. But, the
pulse width that you need to detect (and generate) is 50ns, requiring the
signal to be sampled at 25ns intervals, or 40MHz. Someone suggested to me
that even 40MHz may not be enough, but I have not had a reply back when I
asked what a better sampling frequency might be.
Regards
Rob
Floppy is about 0.5Mhz Hard Disk is 10MHz
ST506-type hard disk? My manuals way 5MHz; RLL 7.5Mhz. Perhaps ESDI,
but that's a different kettle of fish.
Point being that it's possible to emulate a HD 500Khz floppy using an 8MHz
AVR; an 80MHz ARM is quite tame.
--Chuck