Re: A86: 86 interrupts?

To: assembly-86@lists.ticalc.org
Subject: Re: A86: 86 interrupts?
From: Dux Gregis <assets@eden.rutgers.edu>
Date: Tue, 07 Jul 1998 02:36:51 -0600
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <68a4ad25.35a1bcda@aol.com>
Reply-To: assembly-86@lists.ticalc.org

TGaArdvark@aol.com wrote:

> > Thought so. So, where exactly are the link port calls in the 86? I
> > remember looking at the code in one of the higher ROM pages but don't
> > know exactly how to call that code... does it ret like normal or jp
> > somewhere funky?
>
> I forget.  It's in some include file somewhere.  It gets a byte off the
> link (or sends one to the link) and RET's.
>
> > Failing that... <newbie alert> how do I disable interrupts? Is there
> > something in the status register or something?
>
> Did you try the command, DI?  On the Z80, DI disables the
> maskable interrupts (which would cover the linkport).
> (Stands for Disable Interrupts I think.)
>
> > Thanks, and sorry for the lame "Hi again" =P
>
> Haha, it was a joke, Bryan.  I was just getting you back for
> kicking me in #ti (but it did sound lame :-).

I'm going to try and break this to you easy:  there is no link port
interrupt.  You can disable the interrupts if you want, but you aren't
doing anything.  Silent linking is handled by _getkey.

If you want me to prove it, try doing this: graph an equation that takes a
long time to graph (use diff mode), and then plug in your link.  The link
has no effect.  The interrupt is running, but _getkey is not.

References:

Re: A86: 86 interrupts?

From: TGaArdvark@aol.com