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From: fryman@webb.psych.ufl.edu (Josh Fryman)
Newsgroups: comp.lang.pascal
Subject: Re: Interrupts on PS/2 Model 50
Message-ID: <26204@uflorida.cis.ufl.EDU>
Date: 8 Jan 91 14:57:56 GMT
References: <25401@adm.brl.mil>
Sender: news@uflorida.cis.ufl.EDU
Reply-To: fryman@webb.psych.ufl.edu (Josh Fryman)
Organization: University of Florida Psychology Department
Lines: 31


Richard wrote:

>Well, a few comments.  One:  you shouldn't try to do that much in an
>interrupt.  The very nature of the interrupt is to process something as fast
>as possible, then return control to foreground process.  You are defining an
>interrupt that will execute with interrupts masked off for over 0.25 seconds.
>Your alarm function should just post a note somewhere that indicates that
>time is up, and your keyboard polling routine should check this value and
>perform the appropriate tasks.

A good observation. I appreciate that. (Hadn't really thought about it that
way...) I guess it was my fault for not being a little more clear in my first
message. The problem isn't whether it's too long or not, the problem is:

It just doesn't work.

I can not (for the life of me) get the alarm interrupt (4Ah) to respond. It
just doesn't seem to work with the PS/2, but a PS/2 specific book clearly
states that there are NO differences between the AT and PS/2 interrupts here.

Perhaps I am setting it wrong, but I don't see how that's possible. I use
function 6 of interrupt 1Ah and set it accordingly. I've even reset the time
to 0:00:00.00, and programmed the alarm time for 0:00:15.00 by using hex or
decimal. Still, it just will not seem to "go off". Ideas? Opinions?

P.S.   Thanks for the mouse unit. Now I just need to incorporate it into
       the program.

                                            Josh
                                            (Confused...)