14 Jun
2010
14 Jun
'10
1:56 p.m.
On 06/13/2010 02:53 PM, Chuck Guzis wrote:
I've got a 1978 floppy controller here that uses
about 55 ICs, one of
them being a WD1781. A fair amount of the board is taken up by the
data separator--it was designed by a guy whose last job was designing
read channels for the ISS 3330 clone.
What system is it for? I've heard of the 1781, but never seen one. It
was designed to be useful with encodings other than FM and MFM, such as
M2FM.
Eric