21 Nov
2007
21 Nov
'07
1:23 p.m.
On 21 Nov 2007 at 13:56, woodelf wrote:
I don't remember the 8085 having the same extended
opcodes.
PS. Checks the web.
I went to Tundra's site initially, only to find their 80c85 in the
"discontinued, no information" list.
But I might as well reply "check the web":
http://electronicerror.blogspot.com/2007/08/undocumented-flags-and-
instructions.html
The standard "undocumented" 8085 opcodes are exactly the same 10
described by the Tundra document as "extended instructions" (I don't
count RIM and SIM--they've always been documented for the 8085).
They've been mentioned at least a couple of times on this list also.
The upshot of all of this is that Tundra "implemented" nothing except
documentation of instructions that were always present. It would not
surprise me to find that they licensed the mask from Intel all along.
Cheers,
Chuck