Msg: 5280 *Conference*

08-05-94 15:31:35

From: RON WIESEN

To : COMET _

Subj: UNDOCUMENTED 80C85 OPCODES

I'm not sure if you mean undocumented per ROM2 manual or per some other source.
I recently sent an updated version of RELOC.BA to the library here (believe I
named it RELOC2.BA) and I remember seeing it (perhaps in UPLOAD section) here
later.  It, and a related .DO file, reflect some undocumented (and mishandled
by RELOC.BA) 80C85 opcodes.  Perhaps it will document a few of the opcodes
you're interested in.  Sorry my memory is so bad.
 
I'll look at my cheat sheets for ROM2 and see what documentation of opcodes I
have.  I do remember that ROM2 has a pseudo-op that it expands as a pair of
instructions...now what was the it???  Again, bad memory.  Guess Agent Orange
is getting to me.  I think the pseudo-op was MVX (MoVe eXtended register pair)
and there is no corresponding 80C85 instruction.  ROM2 assembles a pair of MOV
instructions.  E.G., MVX B, D is assembled as MOV C, E and MOV B, D instruction
pair.
 
I'll be logging in here more often for next two weeks, then I think I'll be on
the road again.  In case your an Amateur Radio operator like me, I chat with
friends each day while on road to work (1 hour/60 miles).  We only use Morse
Code, not voice, and frequency is 7.058 MHz in 40 Meter band.  My callsign is
WD8PNL.  Each day while traveling in the car I sign "mobile in 4th region" via
callsign WD8PNL/M4.  So feel free to break-in on our group: W4EQE, N8GDO,
WA4MCC, KB4ULR, N5CTO, and a few others.  W4EQE keeps things organized and is
on frequency from appx 6:00 AM EST to 7:45 AM EST.  We frequently hear and
answer West Coast stations at this time (3:00 to 4:45 AM PST).  So if you're an
early riser, give us a call.