ISO: Manual for Emulex CS21/H

Rich Alderson RichA at
Tue Sep 8 18:49:32 CDT 2015

From: Pete Turnbull
Sent: Tuesday, September 08, 2015 2:56 PM

> On 08/09/2015 22:17, Josh Dersch wrote:

>> Anyone out there have a manual for the Emulex CS21/H (or possibly the
>> /U variant)?  This is a UNIBUS DH11 clone.  (There are also /FA, /FB,
>> /FC, and /FD variants which are DMF32 clones - and we have the manual
>> for these but it's of no use for our CS21/H boards :)).

>> At the very least, if anyone has the dip switch settings for this,
>> that would be an immense help.

> Not for a CS21/H, but I have the CS11/H tech manual.  I know they're 
> contemporary, but presumably different; I have no idea how different. 
> The CS11 has four DIP switches:


> I don't know how much, if any, help that is.

Thanks, Pete.  Unfortunately for us, the CS11 and CS21 are very different.
The CS11/H is a DH11+DM11 device, while the CS21 is a DH11 "with DZ11 modem
control" according to the 1982 Emulex parts catalog at Bitsavers (see pages
60 and 65 respectively of


Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134

mailto:RichA at

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