Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - jnesselr

Pages: 1 ... 90 91 [92] 93 94 ... 165
1366
TI Z80 / Re: Online Z80 Table
« on: December 27, 2010, 03:33:44 pm »
This is actually pretty nice. It shows that I am using some form of valid command, too.

1367
Miscellaneous / Re: What did you get for X-Mas?
« on: December 27, 2010, 11:41:32 am »
graphmastur: it's done ;)
Reading this after not having read this topic for a few days and not remembering what exactly I said maid your post seem very ominous.  Very funny, too.

1368
Casio Calculators / Re: Casio Prizm documentation
« on: December 27, 2010, 11:37:08 am »
After changing some of the data you can see a change in the icon, but then the app becomes unrunnable. Any ideas why would be helpful.
The first 2 bytes in the headers are 0xAA and 0xAC, right? On the fx-9860, to disable the checksum you would change the first byte (0xAA) to 0xAC. Try and see if that works.
I tried changing the first byte from $AA to $AC, but the app is still not running.
What happens if the first byte of an unmodified app is changed to 0xAC?
ah ha!! I figured it out!!! ;D ;D ;D ;D The OS uses a modular sum checksum. So as long as I keep the sum of all the bytes added together the app will run. All we need to do now is find out where this sum is located that way we can start modifying some code. Also if you change the first byte to $AC the app does not run.
Excellent news there!

I was thinking that maybe they did the two separate icons in case you wanted to change what it was when it was selected.  Also, how did you figure it out? That it was modular sum checksum, I mean.

1369
General Calculator Help / Re: USB8X/USB Link problems
« on: December 27, 2010, 12:38:52 am »
Yeah, the usb driver can be fickle.

EDIT: Fickle meaning that apparently you can sometimes even reset your calc and it still won't work.  I got the exact error you did yesterday, with the cursor in the top left corner.  Plug in your flash drive into the cable, and then the cable into the calc, then run MSD8x.

1370
General Calculator Help / Re: USB8X/USB Link problems
« on: December 26, 2010, 11:12:03 pm »
Yes, it changes the page you are viewing.

1371
It essentially defines a block of the if statement. In Basic, you don't need one for If, unless you want multiple lines to run. So:
Code: [Select]
If A=1
line A
line B
line C
if A=1, then Line A would be run. but A and B are run here.
Code: [Select]
if A=1:Then
line A
line B
End
line C
the same thing applies for Repeat and While, except they must be used with an End. (No Then, either. So this is a repeat loop that waits for a keypress)
Code: [Select]
Repeat Getkey
End

1372
General Calculator Help / Re: USB8X/USB Link problems
« on: December 26, 2010, 11:03:18 pm »
I have OS 2.43 on there - when I got it from my friend, it had 2.21 on it ;) - I know it won't run under 2.30 because it uses specific BCALLs from 2.30+.

Maybe I should mention this, but it is probably not important: it is a teacher edition (aka has the extra port above the LCD).
That's not important. I had this error once, and can't remember for the life of me how I fixed it. (cursor in the top left corner).  Put calcsys on there. Load a flash drive with 2 files. (A.txt with no data in it and B.txt with the "THE GAME" as it's contents).  Make sure the flash drive is formated as fat16. I would suggest using the smallest one you have, like 512 MB or something.  Plug the flash drive in with the correct cable (mini-A to standard male A).  Then, run MSD8x.  If this doesn't still give you access, go into calcsys.  Go to the hex editor. Type Alpha and then G. Type in "4000".  Then, press Alpha and then R. Type 87.  See if anything about A.txt or B.txt is on there.

1373
General Calculator Help / Re: USB8X/USB Link problems
« on: December 26, 2010, 10:53:24 pm »
Sorry for being so non-descript.  Read the first post to get a general idea of what is happening.

The strange thing is that this calc has extra ram pages - I don't understand why it doesn't load correctly.  I don't think it's a hardware issue, but I'm not sure what else to do.  Creating an external program to initialize usb (with usb8x basic libs) doesn't work (it strangely quits mid-execution) and creating one to run the app doesn't either.

Maybe it's because I have boot code 1.00?  IDK, but it is rather annoying.
I know that usb8x doesn't work until calc version 2.30 or something  Yeah, just checked the readme. It should check for base code 2.30.

EDIT: I have boot code 1.02, and I'm pretty sure I have extra ram pages.

But I have seen this very problem before. Let me remember what I did to fix it.

1374
Other Calculators / Re: TI-Nspire SD card
« on: December 26, 2010, 09:47:43 pm »
I don't have an Nspire. I planned on getting one, but with this prizm now, I don't know.

But yeah, thanks.

1375
Other Calculators / Re: TI-Nspire SD card
« on: December 26, 2010, 09:32:17 pm »
And the boot1 rom can't be erased, or can it?

According to some diagnostic strings quoted above, it seems that it is possible for the diagnostic software to reprogram the boot1.
Excellent! Is boot1 checked at all for encryption or signatures?

1376
Other Calculators / Re: TI-Nspire SD card
« on: December 26, 2010, 09:23:44 pm »
Boot1 immediately runs when the calc turns on, however, the nor rom cannot be very big, so boot2 handles decrypting the os.
It actually decrypts it each time? Wow, that's insane.  And the boot1 rom can't be erased, or can it?

1377
Math and Science / Re: Omnimath Challenge
« on: December 26, 2010, 09:21:24 pm »
Interesting solution.
So, starting today, day N. N=34.
.2(N) is the amount of money made per day.
So, for day one is .2N
For day two, it is .2N+.2(N-1)=.4N-.2=.2(2N-1)
day three: .4N-.2+.2(N-2)=.6N-.6=.2(3N-3)
day four: .6N-.6+.2(N-3)=.8N-.12=.2(4N-4)
It's strange that from day two to day three, I get a jump from 2N-1 to 3N-3. This part doesn't make sense.

1378
Casio Calculators / Re: Casio Prizm documentation
« on: December 26, 2010, 09:18:45 pm »
That looks awesome!

1379
Web Programming and Design / Re: How to make a website
« on: December 26, 2010, 09:10:18 pm »
http://juggernaut.webs.com/

What the?

i know. i could make much better use of it.
Can you find the guy who originally made it and ask for it? I like the flame theme, btw.

1380
Other Calculators / Re: TI-Nspire SD card
« on: December 26, 2010, 09:07:07 pm »
okay, thank you. I get it a little better now. Why is there two boots, though?

Pages: 1 ... 90 91 [92] 93 94 ... 165