jpnz@ames-lm.UUCP (John A. Perrone) (06/26/84)
The following tidbit appeared in the March/April 1980 Apple Orchard.
(Mind you it doesn`t quite apply now)
THE APPLE RUMOR MILL
COURTESY OF PAUL KNEVELS
FROM The Michigam Apple-Gram
It has been rumored that APPLE is working on an APPLE III
computer to be released shortly. At present the only advance in-
formation available is that a new microprocessor will be incor-
porated into the unit - the 6503.
Our research staff has been able to uncover a list of new op-
codes that distinguish the 6503 as a breakthrough in computer
technology.
The listis presented here for you information (and enjoyment).
AGB ADD GARBAGE
BBL BRANCH ON BURNED OUT LIGHT
BAH BRANCH AND HANG
BLI BRANCH AND LOOP INFINITE
BPB BRANCH ON PROGRAM BUG
BPO BRANCH IF POWER OFF
CPB CREATE PROGRAM BUG
CRN CONVERT TO ROMAN NUMERALS
DAO DIVIDE AND OVERFLOW
ERS ERASE READ-ONLY STORAGE
HCF HALT AND CATCH FIRE
IAD ILLOGICAL AND
IOR ILLOGICAL OR
MDB MOVE AND DROP BITS
MWK MULTIPLY WORK
PAS PRINT AND SMEAR
RBT READ AND BREAK TAPE
RPM READ PROGRAMMER'S MIND
RRT RECORD AND RIP TAPE
RSD READ AND SCRAMBLE DATA
RWD REWIND DISK
SRZ SUBTRACT AND RESET TO ZERO
SSD SEEK AND SCRATCH DISK
TPR TEAR PAPER
WED WRITE AND ERASE DATA
WID WRITE INVALID DATA
XIO EXECUTE INVALID OP CODE
XOR EXECUTE OPERATOR
XPR EXECUTE PROGRAMMER
P.S. There is no word from APPLE as to when we might ex-
pect these improvements.
--------------------------------------------------------
Any comments or additions?
Beak<
ech@spuxll.UUCP (06/28/84)
These lists of strange op codes resurface from time to time; how about a bit of trivia for you older hackers: the 1401 had a "Halt and Branch" instruction - and it was actually USEFUL. Anybody want to try to explain this one? =Ned=
MKrigel.ES@XEROX.ARPA (06/29/84)
"Our research staff has been able to uncover a list of new
op-codes that distinguish the 6503 as a breakthrough in
computer technology."
You forgot one:
HCF - Halt and Catch Fire.
Marctac@teldata.UUCP () (07/06/84)
, (sop to the blank line eaters--consider it a religious sacrifice) >> From: ech@spuxll.UUCP (Ned Horvath) >> >> These lists of strange op codes resurface from time to time; how about a >> bit of trivia for you older hackers: the 1401 had a "Halt and Branch" >> instruction - and it was actually USEFUL. Anybody want to try to explain >> this one? >> >> =Ned= If my "core" serves me correctly, this instruction would halt until a certain event happened and then recommence processing. Thus it could be used as an interrupt without branching. From the (Age Old) Soapbox of Tom Condon {...!uw-beaver!teltone!teldata!tac} A Bug A Day Keeps Unemployment Away. DISCLAIMER: The opinions expressed herein are those of everyone who matters, but not necessarily anyone you know, and most certainly not my employers!