Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!samsung!rex!rouge!CHAMBERSDJ@EA.USL.EDU
From: chambersdj@EA.USL.EDU
Newsgroups: comp.sys.handhelds
Subject: 48SX ON key
Message-ID: <00939A82.DB53E1C0@EA.USL.EDU>
Date: 14 Jul 90 15:13:59 GMT
Sender: anon@rouge.usl.edu
Reply-To: chambersdj@EA.USL.EDU
Organization: Univ. of Southwestern Louisiana
Lines: 16

I remember a long time ago someone posted the syseval for the hp28s off
function and said that it could be used to implement a kind of password
protection on that machine.  I tried it on my hp48 but there is one problem
if the user hits ON (attn) fast enough it breaks the program because
the IFERR trap statement doesn't get executed:

<< IFERR ...stuff to input and check a password...
   THEN IF ERRN 0 == THEN DROP2 GETPASS @ recursive call...
    END
>>
stored in 'GETPASS'  

IS there a way to disable or trap the ATTN function?? mabe with 
machine code?

-Darrin Chambers    ChambersDJ@usl.ea.edu