Western Digital MFM Controller(s) on AT systems.

[John Kourafas]

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?

            PRODUCTS FOR AT SYSTEMS
HARD DISK CONTROLLERS FOR MFM HARD DISK DRIVES - NO FLOPPY SUPPORT

WD1006-WAH , feature F001R -
Hard disk controller card with an ST506/ST412 interface.  It supports 2 MFM 
drives with up to 16 heads and 2048 cylinders, 1:1 interleave.

HARD DISK CONTROLLERS FOR MFM HARD DISK DRIVES AND FLOPPY DISK DRIVES
WD1003V-MM2, feature F300R - Hard disk controller card with an ST506/ST412 
interface.  It supports a maximum of 2 MFM drives with up to 16  heads and 
2048 cylinders at 2:1 interleave, and 2 floppy disk drives (5-1/4" 360K, 
1.2Mb; 3-1/2" 720K, 1.44Mb).
          The "V" boards can run in high speed AT systems, (10 to 16 
megahertz system speed).

All I have for pre 16Mhz is an 80186 8 Mhz but it doesn't have ISA slots, 
some odd-ball convergent technologies bus, I tried these cards in a 486 DX2 
80 so that is why I'm asking about the high speed AT systems.


-John