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From: akcs.scotty@hpcvbbs.UUCP (SCOTTY THOMPSON)
Newsgroups: comp.sys.handhelds
Subject: Re: Help RPL Tokens
Keywords: rpl, tokens
Message-ID: <285a3f4c:3003.2comp.sys.handhelds;1@hpcvbbs.UUCP>
Date: 15 Jun 91 16:40:04 GMT
References: <2822f978:3003comp.sys.handhelds@hpcvbbs.UUCP> <285159d4:3003.1comp
Lines: 34

After hacking for awhile, I was able to determine exactly what these
"Tokens" were.  However, to reitterate a previous post, nested tokens
like:

D9D20 [PROGRAM]
..... {COMMANDS}
XXXXX SKIP NEXT TOKEN
D9D20 [PROGRAM]
..... {COMMANDS}
D9D20 [PROGRAM]
..... {COMMANDS}
XXXXX SKIP NEXT TOKEN
B2130 [END_MARKER]
..... {COMMANDS}
B2130 [END_MARKER]
B2130 [END_MARKER]

don't seem to work if I have a "skip next token" preceeding an
end-marker.  I would really like to know how to properly nest this type
of "token" list.  For example, a simple IF THEN ELSE structure will
execute the next token and skip the next or skip this token and execute
the next.  I know there are routines already in ROM that do this, but
they require that "TRUE" or "FALSE" (for example) be on the stack.  I
wrote m/l routines that call skip next, etc. for quick analysis and
execution.  Test routines in system RPL as described above behave
improperly when nested.  Any help is muchly appreciated (it's SAT a.m.,
grammer and spelling become inverted and intertwined).

Derek, I'm going to send you a check for a few bucks for Voyager since I
have been using it considerably.  Just a suggestion: PLEASE ALLOW US TO
EXIT AT ANY TIME FROM THE "PRESS ENTER TO CONTINUE" LINE AND EXAMINE
CODE.  BETTER STILL, CAN WE PRESS A KEY TO "PUSH" THIS LOCATION, STOP
THERE, EXAMINE CODE AND UPON ENCOUNTERING GOYES' (ETC.), PUSH THOSE
ADDRESSES AND EXAMINE THE ROUTINES AND POP THEM TO RETURN OR HAVE A MENU
LIST POP UP TO SELECT THE RETURN "POP" ADDRESS?