Re: A86: turning off the calc

To: assembly-86@lists.ticalc.org
Subject: Re: A86: turning off the calc
From: ComAsYuAre@aol.com
Date: Mon, 24 May 1999 18:01:28 EDT
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Delivered-To: assembly-86@lists.ticalc.org
Reply-To: assembly-86@lists.ticalc.org

In a message dated 5/24/99 16:56:13 Eastern Daylight Time, McBorder@aol.com 
writes:

> i have seen several routines that turn the calc off 
>  they turn off the screen then do  ei \ halt
>  how come the interrupts that occur at 200 Hz dont break the halt?
>  

it has to do with port 3.  you have to send 1 to port 3 before shutting off 
the calc or else a regular interrupt _will_ break the halt.  for more info 
about port 3, check out the advanced interrupts section at 86 central.

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