Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!cica!iuvax!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!cs225af
From: cs225af@ux1.cso.uiuc.edu
Newsgroups: comp.sys.apple
Subject: Re: Error reporting under Prodos 8.
Message-ID: <15800070@ux1.cso.uiuc.edu>
Date: 13 Feb 90 07:29:00 GMT
References: <8190@wpi.wpi.edu>
Lines: 20
Nf-ID: #R:wpi.wpi.edu:8190:ux1.cso.uiuc.edu:15800070:000:553
Nf-From: ux1.cso.uiuc.edu!cs225af    Feb 13 01:29:00 1990



If you just need to send an error back to an Applesoft BASIC program, to
be trapped by an ONERR GOTO routine:

LDX #err
JMP $D412

will do the trick.  It calls the routine Applesoft uses to generate its own
errors.  Set the error code to whatever you want, and your ONERR GOTO
can check for it w/ PEEK (222).  Also:

JMP $DD76		generates a ?TYPE MISMATCH ERROR
JMP $DEC9		generates a ?SYNTAX ERROR

all this may not be too clean, but under Applesoft it works like a charm.
If this isn't what you were asking, just ignore all the above.   =)


-- rubio