Author Topic: How to obtain TI-81 rom?  (Read 22907 times)

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Offline calcdude84se

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Re: How to obtain TI-81 rom?
« Reply #30 on: June 22, 2010, 03:44:51 pm »
Well, it's slower because it's being emulated, rather than just run. The only calc for which you may get almost-normal speed is the 81, since it was only 2MHz in the first place. I don't think the 81 ROM is made into an 86 one, but I'm not sure.
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Offline ztrumpet

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Re: How to obtain TI-81 rom?
« Reply #31 on: June 22, 2010, 08:24:00 pm »
My 86 is fun to mess with, only it only partially works with Ti-Connect (for me). :(
I can transfer some files, but not others and I've yet to notice why they fail. :(

I think getting an 86 would be fun for you Sir. :D

The 82 is not supported with the most recent version of Ti-Connect. :(

Offline FinaleTI

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Re: How to obtain TI-81 rom?
« Reply #32 on: June 22, 2010, 08:25:15 pm »
So does anyone know if you can get TiLP to run in 64-bit Windows?
If so, I might be able to link to my 82.


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Offline DJ Omnimaga

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Re: How to obtain TI-81 rom?
« Reply #33 on: June 23, 2010, 01:53:50 am »
You may want to check the forum help section or other calc discussion areas for TiLP threads. There was a TiLP progress thread somewhere by Lionel Debroux or JonimusPrime, which might have some info on 64 bit support.

Offline Galandros

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Re: How to obtain TI-81 rom?
« Reply #34 on: June 23, 2010, 05:00:37 am »
The TI-81 roms were dumped by one (or group) of this fellows: Randy Compton, critor (I think he collects TI roms), Brandon Wilson or Benjamin Moody.
3 pages and you did not answer the initial pertinent question. :P There must always do a first legit dump.

The procedure was:
Hack the TI-81, code or get get a program that displays hexadecimal of the rom on the screen.
Run it while a camera is filming
Get a script to convert the text on the video to text or do it manually
Convert the hexadecimal text into a binary file (easy enough to code on C/C++, a quick PHP script or google for some program)

I think Emu8x does need some extra ram pages...
To run a TI-81 rom you need the TI-86 patch or you code to one of the open source emulators (Wabbitemu, PindurTI (no one continues it) or Tiemu for z80)
« Last Edit: June 23, 2010, 05:12:57 am by Galandros »
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Offline DJ Omnimaga

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Re: How to obtain TI-81 rom?
« Reply #35 on: June 23, 2010, 10:53:43 am »
Well no need to badmouth people for that. If you notice, a lot of the people around who are very active were not back when those ROMs were dumped. And yeah I remember that procedure, it seemed rather hectic to dump a ROM. If I remember you needed good lightning too

Offline willrandship

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Re: How to obtain TI-81 rom?
« Reply #36 on: August 11, 2010, 12:54:26 pm »
86 ti-connect always worked for me, just some programs wouldn't send. Those programs had a bad header, usually.

I didn't think you needed that much power (lightning)

TilP will send the files that TI-connect wouldn't, but half of them crashed my calc anyways :P Get TI-Graph-link for more compatibility, but you can't use the silverlink, you'll need a serial cable.

Offline qazz42

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Re: How to obtain TI-81 rom?
« Reply #37 on: August 11, 2010, 02:52:51 pm »
Feh, the TI-86 causes a crash on my missing-ram page ti-84+se when using emu8x I can only wonder if the same happens with the ti-85 rom


« Last Edit: August 11, 2010, 02:55:07 pm by qazz42 »

Offline calcdude84se

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Re: How to obtain TI-81 rom?
« Reply #38 on: August 11, 2010, 04:03:43 pm »
yeah, along with the 82, 83, and 81, AFAIK. They'll all crash eventually.
The reason why is because of how emu8x uses extra RAM.
Page $82 contains ram page 1 of the emulated calc, and page $83 contains ram page 0. At the beginning of page $84 is where the emulated LCD is backed up. Other stuff is stored in appBackupScreen. (L3 for you Axe programmers ;D)
On the calcs w/o the extra RAM, all the extra pages are the same. Pages $82, $83, and $84 are all the same page.
This means that, for the emulated calc, a write to, say, $9D95 (which is on ram page 1), will be mirrored at $DD95 on ram page 0.
When you press left-right-alpha to bring up the emulator menu, the emulated LCD is backed up, and overwrites $8000-$82FF and $C000-$C2FF in the emulated calc's RAM.
Keeping it from crashing is an art :P
Edit: Actually, the LCD backup might be used actively, which means those addresses mirror the LCD constantly. x.x
And for the 86, it's even worse, because it uses all the extra RAM pages.
« Last Edit: August 11, 2010, 04:05:43 pm by calcdude84se »
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Offline qazz42

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Re: How to obtain TI-81 rom?
« Reply #39 on: August 11, 2010, 04:05:08 pm »
As long as I dont return from the left right alpha menu I should be fine x.x


Now I want a TI-83+SE

Offline calcdude84se

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Re: How to obtain TI-81 rom?
« Reply #40 on: August 11, 2010, 04:10:14 pm »
I've had it crash for an emulated 81, too. Unity doesn't install, and matrix operations cause funny things to happen. Theoretically, a fixed version of the emulator that works correctly can function on a newer 84+(SE), since it only needs 8KB of RAM plus the 768 bytes for the LCD.
Edit: Yeah, an 83+SE would be awesome. I'm gonna look into getting one eventually.
« Last Edit: August 11, 2010, 04:10:50 pm by calcdude84se »
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Offline qazz42

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Re: How to obtain TI-81 rom?
« Reply #41 on: August 11, 2010, 04:15:21 pm »
I try to not use the TI-81, although it is slightly faster, I plan to use it in the state test, so when it is time for resetting, they reset the TI-82 instead <.<

>.>

Offline calcdude84se

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Re: How to obtain TI-81 rom?
« Reply #42 on: August 11, 2010, 04:19:24 pm »
??? What?
Emu8x is much slower than the real calc, and you'd be better off using your 84+SE anyway.
If I am misunderstanding you, which I probably am, could you elaborate?
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Offline qazz42

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Re: How to obtain TI-81 rom?
« Reply #43 on: August 11, 2010, 04:22:37 pm »
Err, yeah, sorry

1. test starts

2. teacher comes to reset calc

3. I put it in TI-83/82/81 mode (whichever)

4. teacher resets the emulation

5. I go back to TI-84 mode and start the test with all my programs and stuff

Offline calcdude84se

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Re: How to obtain TI-81 rom?
« Reply #44 on: August 11, 2010, 04:25:47 pm »
First of all, that's cheating ;D
Ignoring that, they might realize that it's slower or that it acts differently than the normal calc (The reset menu looks different on the 81/82/83 than the 83+ series) :P
« Last Edit: August 11, 2010, 04:28:19 pm by calcdude84se »
"People think computers will keep them from making mistakes. They're wrong. With computers you make mistakes faster."
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