DEC and Emulex boards (was: DEC boards at recycler)

Josh Dersch derschjo at
Mon Jul 18 17:48:35 CDT 2016

On Mon, Jul 18, 2016 at 3:34 PM, Jules Richardson <
jules.richardson99 at> wrote:

> I hauled the DEC + friends boards home earlier which I mentioned finding
> on the list last week.
> The "unknown" board I'd noted down as M7961 is actually M7951, which
> Google suggests is a DUV11 interface board (whatever one of those may be ;-)
> The board with the 128 mmc3764 ICs on it has what I think is a National
> Semiconductor logo on it. Google's no help in IDing the 3764, but I'm
> guessing it's a 64kx1 DRAM or related.
> Next up we have the Emulex boards - all "FH" ("full height", 4 bus
> connectors) or "HH" ("half height", 2 bus connectors):
> TU0310401, FH, 2x50-pin headers on outer edge.
> SU0210401, FH, 1x60-pin and 2x26-pin headers on outer edge.
> CU0210402, FH, 2x50 pin and 1x16-pin headers on outer edge.
> QD3310401, HH, 1x60-pin on outer edge and 2x26-pin headers just inboard.
> QD2110402, HH, 2x20-pin headers on outer edge, then a 34-pin and 10-pin
> header just inboard.
> I think all of these boards have at least one 40-pin IC on them with a
> label which generally bears a number close to the ones on the PCBs quoted
> above; I can reel those off if needs be.
> But anyway... anyone know from that what any of these boards are? I
> suspect there's some SMD in there, possibly ST506/412 in the case of the
> one with the 34-pin connector. Not sure if I'm lucky* enough for any of the
> others to be SCSI though, or if they're some form of tape (or something
> else entirely).

The QD33 is an SMD controller, the QD21 is an ESDI controller.  I'd wager
the TU03 is a Pertec-compatible tape controller.  Nothing looks to be SCSI
to me, unfortunately...

- Josh

> * I only say that because I have a vague notion to see if I can rustle up
> a backplane somehow and get a minimal system running; it would be kind of
> fun.
> cheers
> Jules

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