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Messages - calcdude84se

Pages: 1 ... 82 83 [84] 85 86 ... 161
1246
Computer Usage and Setup Help / Re: command.com on win7 help
« on: September 15, 2010, 07:13:55 pm »
Is it Windows 7 32-bit or 64-bit? 64-bit OS's can't run 16-bit programs (most DOS programs are) and 64-bit Win7 doesn't have command.com.
If it's 32-bit, try Win+R and type command.com, or perhaps use the "Search programs and files" feature.

1247
Axe / Re: CheckSums in Axe?
« on: September 15, 2010, 06:57:08 pm »
MD5... that seems to be a bit too much :P
It's another hash function, and has some desirable features including the difficulty of making something with a certain hash.
Only problem is computing it will take a bit longer than you would probably like (probably on the scale of a couple programs a second) because it involves 32-bit calculations, which are more difficult in Axe.
However, MD5 is not very secure (a few seconds on a modern PC to break it), and moving to SHA-2 is, best put, ridiculous.
It mainly depends on the protection you want. If you want more than a simple checksum or variations thereof, I can only think of MD5...
Somebody else can probably tell you more than I have ;D
Link to documentation on MD5

1248
ASM / Re: ROM Layout
« on: September 15, 2010, 06:46:08 pm »
Could you post your results in case someone else has the same problem?
The .rom file is just a raw binary file containing the contents of the Flash ROM.
The first 16KB of the file is page $00, the next 16KB page $01, and so on until either $1F, $3F, or $7F for 83+, 84+, and 83/84+SE respectively. In the same order, the resulting sizes are 512KB, 1MB, and 2MB.

1249
The Axe Parser Project / Re: Axe Parser
« on: September 15, 2010, 06:42:43 pm »
We have archiving and unarchive via the "Archive " and "UnArchive " commands, which take a pointer to a name and return 0 if the operation failed, and IIRC 1 on success :D

1250
Axe / Re: CheckSums in Axe?
« on: September 14, 2010, 08:17:41 pm »
Typically transmission errors (TI's transfer protocol uses it).
It can as soon as the degree sign (for address-of) becomes official. (You have to be able to select an arbitrary page, which can be done by manually setting a "file pointer")

1251
Axe / Re: CheckSums in Axe?
« on: September 14, 2010, 08:04:35 pm »
It depends on what you're checksumming ;D
In short, you'd calculate it for the normal version, and check with something else.
Also, there are more advanced algorithms which make faking more difficult. (The checksum example I gave is more for error-checking than anything else, and is easily bypassed) However, I'm not sure how practical some of them are.

1252
Axe / Re: CheckSums in Axe?
« on: September 14, 2010, 07:56:35 pm »
Checksum? There are several forms. The simplest is the sum of all bytes mod 16.
Example code that displays the checksum of prgmTEST in RAM:
Code: [Select]
GetCalc("prgmTEST")->P
0->A
{P-2}r+P-1->E
For(X,P,E
A+{X}->A
End
Disp A>Dec

1253
ASM / Re: Why doesn't "this" work?
« on: September 14, 2010, 07:05:18 pm »
There's also a "ld (addr),hl" ;D
You should be able to use that to solve your problem :)
Edit: I might look at the code myself later.

1254
Other Calculators / Re: TI-84 Plus OS
« on: September 14, 2010, 07:02:29 pm »
Qazz, a lot ;D
Especially if you include Archive :P
Do you mean apps, programs, or something else, though?

1255
Other / Re: TI Tablet PC
« on: September 14, 2010, 06:59:01 pm »

A picture. And no, pixels are squares ;D

1256
WabbitStudio Software Suite / Re: WabbitStudio Software Suite
« on: September 14, 2010, 06:55:43 pm »
Most definitely. A feature seems required :)
It's just that awesome ;D

1257
Note that dragging and dropping doesn't work, actually, at least for now. (My mistake, noted earlier)

1258
The Axe Parser Project / Re: Compile Off-Calc
« on: September 14, 2010, 06:48:57 pm »
Finally, Buckeye gets around to adding it :P (We're very appreciative)
Good luck with whatever this is for :) (contest, I suppose?)
Edit: 1000th post! :D

1259
ASM / Re: Initial Calculator State
« on: September 14, 2010, 06:47:32 pm »
Oh, I thought this was in relation to making an OS :)
Undefined for regs, $0000 for PC, $0000 for SP (I think), IM 0, most other things should be zero'd, too, but I'm not sure ;D

1260
ASM / Re: ROM Layout
« on: September 14, 2010, 06:45:57 pm »
Okay. Good luck with whatever you're trying to do :)

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