23 Oct
2006
23 Oct
'06
7:55 a.m.
From: Dave McGuire <mcguire at neurotica.com>
On Oct 22, 2006, at 7:10 PM, dwight elvey wrote:
Hi Dave
Yes, I mean Harris RTX2000. A little brain fade.
I have a NC4000 on a delta board. I made a few changes.
It now has a shadowed boot ROM and I have both hard and
floppy drives connected.
Chuck is right that vector math is a little difficult to do efficiently.
It is just that most stack machines have been implemented as
simple stacks. This is mostly to keep them small and fast otherwise.
Dwight
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Over the years, several machines have been created
that ran quite
fast. A variation of the NC4000 made by Rockwell ( I think called the
RT2000 ) was often used on DSP excelerator cards.
RT2000...Do you mean the RTX2000, by Harris? Wow...Novix NC4000 and
Harris RTX2000...damn fine Forth chips. I'd sure like to see a Verilog
implementation of one of those designs. (well, less "see" and more
"compile, burn into a config PROM, and hack on")
-Dave
--
Dave McGuire
Cape Coral, FL