More mystery recycler boards - DEC, Fujitsu(??), Cipher, Emulex

Jules Richardson jules.richardson99 at
Tue Sep 6 21:32:27 CDT 2016

On 09/06/2016 08:58 PM, Noel Chiappa wrote:
>      > From: Jules Richardson
>      > M8190-AE     ; 11/83 CPU
>      > M8190-AB     ; 11/83 CPU (or /73??)  w/FPU
> As far as I know, all the M8190's are _basically_ the same: they are the
> KDJ11-B CPU, which support the PMI memory bus, can operate with a KTJ11-B to
> provide a UNIBUS, etc. They are the CPU in an 11/83 (with QBUS only
> backplane) and the 11/84 (with QBUS/UNIBUS backplane).

I got the /73 reference from a post of Pete's last year:

... but I' m guessing he just meant that the slower ones work at the same 
speed as a true /73?

Unfortunately there aren't any markings on the crystal on the -AB board 
(well, there probably are, but on the underside and it would have to be 
desoldered) so I don't know if it's a 15MHz or 18MHz part.


More information about the cctalk mailing list