Webster WQSMD/04 Qbus SMD Controller

Pete Turnbull pete at dunnington.plus.com
Sun Dec 13 11:42:57 CST 2015

On 13/12/2015 07:40, Robert Jarratt wrote:
> I picked up some Qbus cards yesterday. They seem to be board set for
> a MicroVAX II. However, one of the cards was, to me at least, a bit
> unusual. It was made by a company called Webster, and it appears to
> be a controller for SMD disks. I was not familiar with SMD disks and
> had to look them up. I suspect this might be a little out of the
> ordinary, and, possibly, an odd combination for a small Qbus system
> to access such a physically large type of disk. Were MicroVAX IIs
> used much with such disks? Is this a bit of an unusual find?

Two of my pdp-11s came with large SMD drives, albeit with Emulex 
controllers rather than Websters.  They're not uncommon.  The 
controllers typically use large drives to emulate two or more smaller 
types - in my case, RM06s.


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