25 Apr
2005
25 Apr
'05
12:12 a.m.
Magnus Danielson wrote:
Dear all,
I'm sitting here with a M7676 SBC11/21+ Falcon Plus card. It came with a
BA11-VA chassi and a custom A/D card (controlled over the parallel bus).
I have been scanning the Internet a number of times, but have had no luck in
finding much material related. It has the T11 (DC310) chip, a pair of DC 319
serial chips and some unknown chip called DC331 "FALCON". I've found a few
related hints about it in the Micronotes (about the 82S100 PLA chip among
other things). I've also done some reverse-engineering, so part of the
schematic is know to me. But, since I have no plans of reverse-engineering the
DC331 chip getting the hands on some hard documents would be much apprechiated
While it isn't identical, you might find the user guide for the original
M8063 Falcon SBC 11/21
to be at least somewhat useful. It can be found at:
http://www.bitsavers.org/pdf/dec/pdp11/1121/EK-KXT11-UG-PR1.pdf
As far as I can remember the Falcon and Falcon+ are functionally very
similar with the Falcon+
supporting larger memory devices and having a more flexible set of
options for the memory map.
Chapter 6 of the 1985 edition of the Microcomputer Products Handbook
lists all of the configuration
options for the Falcon+ and also shows the DC331 at E20 as being a "gate
array". I have a copy
of this manual and could send you a copy of the relevant pages if that
would be helpful.
Michael Davidson