1 Aug
2013
1 Aug
'13
10:06 a.m.
On Thu, Jul 25, 2013 at 12:23:46PM -0400, David Riley wrote:
The older DEQNA
(which, if I'm not mistaken, is essentially a Qbus version of the DEUNA)
It's not your mistake, it was DEC's! Sadly the DEQNA and DEUNA are not
even remotely similar from a SW point of view, so they need completely
different drivers to do the same job.
As far as I can tell, the DELUA is the Unibus
equivalent to the DELQA.
Rolling out new versions would have been a golden opportunity to close
the differences (as they did with the DHQ11, which IIRC was more like the
DHU11 than the DHV11 had been), but again sadly no. Both have improved
performance (and 68K series CPUs instead of T11 or i8051) but the same
programming models as their predecessors (except the DELQA-YM which has a
totally new "Turbo" mode, but AFAIK it's not enabled/used by DEC PDP-11
OSes so I guess it must have been intended for the MicroVAXes).
John Wilson
D Bit