A83: Re: Re: Re: TI coding skillz

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A83: Re: Re: Re: TI coding skillz


I took a peek.  I found the code and text, and it is on page $0C, which is
the ROM entry point page on the 83.  My guess is that TI had a bunch of left
over space on this page, so just stuck the sample stuff on at the end, after
the entry point call table.  I'ven't a clue whether there is actually any
way to access this from the TIOS or whether it's just sitting around in the
ROM, though I'd guess the latter.  I wrote a program to check if the same
code was anywhere on the 83 Plus, and the text "cool" never appears anywhere
in the TI-83 Plus's ROM.  Of course, there could be something else
altogether hiding in there...

-Dan Englender

----- Original Message -----
From: "Frank Schoep" <dsfs98@concepts.nl>
To: <assembly-83@lists.ticalc.org>
Sent: Wednesday, November 29, 2000 10:25 AM
Subject: A83: Re: Re: TI coding skillz


>
> ah, finally an intelligent person :-)
>
> look -> I've written a ROM tool program, but never finished it. I used it
to
> deassemble/view the ROM in a normal text editor with addressing and stuff.
> You can find the prgm at
http://home.concepts.nl/~dsfs98/stuff/log/tirom.exe
> . I'll upload it asap. You can then convert a rom image to a .HEX file
with
> addressing and so forth. Use the pogrom like this: click on 'convert rom
> image to HEX' and type some madly flippin' large number in the 'end
convert
> address', then switch the converter to the extended mode. Click go and do
> what the program says.
>
> It takes a while to convert a whole TI83 ROM image, thanks to my madly
> programming skillz (not!).
>
> This excerpt is taken from a piece of the TI83 ROM: (looks FAR better with
a
> fixed width font)
>
> 0313D0h - 84 4A CD 08 54 CD 64 51 CD 32 42 CD 36 45 CD 42  -
> "J.TdQ2B6EB
> 0313E0h - 42 CD B6 40 CD 36 45 26 01 CD 00 4B CD 08 54 CD  -
B@6E&..K.T
> 0313F0h - 64 51 C9 CD 3D 47 21 2C 54 CD 0D 47 FB CD FE 4C  -
> dQ=G!,T.GL
> 031400h - FE 05 20 F9 CD 3D 47 C9 21 00 07 22 52 82 21 2C  - .
> =G!.."R,!,
> 031410h - 54 CD 81 47 FB CD FE 4C FE 05 20 F9 C9 63 68 61  - T́GL.
> cha
> 031420h - 72 20 74 65 73 74 20 64 6F 6E 65 00 70 72 65 73  - r test
> done.pres
> 031430h - 73 20 65 6E 74 65 72 00 59 65 61 68 20 59 65 61  - s enter.Yeah
> Yea
> 031440h - 68 20 74 68 69 73 20 69 73 20 63 6F 6F 6C 00 FF  - h this is
> cool.
>
> This is one demo example. The rest should be there, too. This worked for
ROM
> version 1.07 of a normal TI83. D/L the program and decide for yourself if
> you can figure out this mystery. Personally I would rather have more RAM
> available than TI's coding skillz on calc.
>
> I hope this corrects the fact that one of you called me some sort of
> dumba$$.
>
> Frank Schoep
> ====================
> If you're better than anyone else,
> what's the point in wasting time
> pretending to be ordinary
> ====================
> dsfs98@concepts.nl
> http://home.concepts.nl/~dsfs98
> ====================
> -----Oorspronkelijk bericht-----
> Van: Dan Englender <dan@calc.org>
> Aan: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
> Datum: woensdag 29 november 2000 10:58
> Onderwerp: A83: Re: TI coding skillz
>
>
> >
> >"Suggestions...?"
> >My suggestion is to tell us where in the ROM it's located so we can take
a
> >peek :)
> >
> >-Dan Englender
> >
> >----- Original Message -----
> >From: "Frank Schoep" <dsfs98@concepts.nl>
> >To: <assembly-83@lists.ticalc.org>
> >Sent: Tuesday, November 28, 2000 9:57 AM
> >Subject: A83: TI coding skillz
> >
> >
> >>
> >> This is a creepy post of some sort. Please read on:
> >>
> >> 1 year ago
> >> =========
> >> Everyone knows about the funny demonstration programs TI wrote to show
> how
> >> to do assembly on a 83 calc. You even tried to get them working, didn't
> >you?
> >> The programs were coded in a simple way, so people knew what happened.
> >>
> >> now
> >> ===
> >> While doing some research on the TI83 ROM, you figure out that TI has
> >> actually built in the examples. You just don't know how to access them.
I
> >> don't know either - I only found them in the TI83 ROM image I have.
> >>
> >> Suggestions...?
> >>
> >> Frank Schoep
> >> ====================
> >> If you're better than anyone else,
> >> what's the point in wasting time
> >> pretending to be ordinary
> >> ====================
> >> dsfs98@concepts.nl
> >> http://home.concepts.nl/~dsfs98
> >> ====================
> >>
> >>
> >
> >
>
>
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