Western Digital MFM Controller(s) on AT systems.

[Chuck Guzis]

On 7 May 2007 at 21:02, John Kourafas wrote:

> I have a WD1006-WAH   &  WD1003V-MM2  mfm hard drive controllers. I have the 
> WD Products text file from their old BBS (Feb 1989), my question is about 
> the "high speed AT systems" which WD says is 10 to 16Mhz, does this actually 
> mean these cards will not run in higher speed ISA systems like a 386 25mhz?

I believe they're talking about *bus* speeds.  In any case, I've used 
the 1006WAH and 1006SR2 sucessfully on a 100Mhz 486 DX4 system.  
Aside from a few oddball "times things in a CPU loop" cards, most ISA 
cards should work in modern (e.g. PIII, P4 CPU) systems. ISA bus 
timings haven't changed drastically from the old PC-AT days.  Heck, 
I've even found PII ISA buses that are *slower*  than the original PC-
AT  

Cheers,
Chuck