A92: Re: 458738 bytes of archive memory!

To: <assembly-92@lists.ticalc.org>
Subject: A92: Re: 458738 bytes of archive memory!
From: "Nicolas Ochem" <Nochem@bplorraine.fr>
Date: Sun, 11 Oct 1998 21:08:59 +0100
Delivered-To: assembly-92-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-92@lists.ticalc.org


That's great. I wonder how it works. Indeed, when you reset the calculator,
the amount of memory avilable is back to normal. That is to say, no rom code
is corrupted !
However, it can't be absolutely perfect, otherwise TI would have thought of
it earlier !?



>Here's the easy way to get 458K archive memory.  For real!  (I tested it
>personally)
>
>Download the included test.9xz to a freshly reset TI-89 or TI-92+.
>Run the program by typing test() and press enter.
>
>Thats it!
>
>For those of you who want to know how it's done, take a look at this source
>code:
>
>    include "tios.h"
>
>    xdef _main
>    xdef _nostub
>
>_main:
>    move.l #$590000,-(a7)
>    ROM_CALL $16b ;Call to erase ROM sector
>    add.l #4,a7
>    move.l #2,-(a7)
>    move.l #$590000,-(a7)
>    pea.l buf(pc)
>    ROM_CALL $171 ;Call to write to ROM
>    add.l #12,a7
>    rts
>
>buf dc.b $ff,$fe
>
>    end
>
>
>

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