Re: A86: Re: Port 4?

To: <assembly-86@lists.ticalc.org>
Subject: Re: A86: Re: Port 4?
From: "Dux Gregis" <assets@eden.rutgers.edu>
Date: Sun, 29 Nov 1998 19:39:58 -0500
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org



I think that it might set the interrupt speed from the documentations I have
seen on other calculators.


>
>That wouldn't be the hardware reset, would it?  I've heard that when the
>calc first starts up after a battery-pull, there is a short piece of
>code near or at the beginning of the ROM that resets everything... ?
>
>
>> ... In fact, the first
>> two instructions the rom executes are <ld a,$57 \ out (4),a>.  It has
>> something to do with the hardware, but no one except Pat knows.  You'd
have
>> to ask him.

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