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Messages - jnesselr

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1861
TI Z80 / Re: The Towers of H'annoy
« on: November 17, 2010, 06:53:15 am »
I know how to solve it one way, but how about upside down? Interesting indeed.  I'll try it later.

1862
Other Calc-Related Projects and Ideas / Re: Nspire OS Risk/Weakness
« on: November 17, 2010, 12:12:43 am »
Not really sure how to explain that.
Can anyone tell me which key we need to factor mod 4 and mod 12? Posting the key itself would also be nice. ;-)

1863
Miscellaneous / Re: Dragon Cave discussion
« on: November 15, 2010, 08:06:22 pm »
This looks really cool!

Good job Gibaoran

1864
Computer Usage and Setup Help / Re: Cpu Fail
« on: November 15, 2010, 07:16:36 pm »
Well, the only thing left is to transfer the hard drive and hope you can save stuff off of it.  Godspeed.  Be sure to give it a proper burial.  Also, remember that you can reuse parts in it.  Pictures would also be nice.  What type of computer was it?  CPU, mem, etc.

1865
The Axe Parser Project / Re: Axe Parser
« on: November 14, 2010, 08:24:42 pm »
Okay, I get it now. Thanks!
No problem.  Tis what we are here for. ;-)

1866
KnightOS / Re: KnightOS
« on: November 14, 2010, 08:24:09 pm »
Not too much.
whoa, ninja-edited.  Anyway, then I think it might be a good idea.  What state of "hibernation"?  Would all threads pause or what?  And then, when the power is back on, the threads re-start?

1867
The Axe Parser Project / Re: Axe Parser
« on: November 14, 2010, 08:22:33 pm »
Either or.

As in, if A and B , then  A or B is also true. A xor B is not true

So, the whole statement is true only if one (i.e. A) is true and the other (i.e. B) is not?  Or am I completely off?

Also, I was wondering about the !
Is
!If X=2 and C=3
the same as
If X=/=2 and C=/=3
or does the ! only apply to the first term?
the !If should apply to the whole statement.

The logic table for xor is:
0 xor 0 = 0
0 xor 1 = 1
1 xor 0 = 1
1 xor 1 = 0

1868
KnightOS / Re: KnightOS
« on: November 14, 2010, 08:16:08 pm »
Wouldn't that kill the battery? 

EDIT: I mean quicker.  When is the backup battery used in TIOS?

1869
Humour and Jokes / Re: 1000 things SirCmpwn should include in KnightOS
« on: November 14, 2010, 08:06:28 pm »
35: Reprogram all of the keys to switch with each other, and as soon as the calc thinks you might have figured it out, switch again.
36: Have a message that pops up every 2.5 seconds when you have a low battery, and if you don't hit okay followed by a 27 digit key code to close it, the calc will auto-lock itself by doing di/halt and then waiting until you re-install the batteries.

1870
KnightOS / Re: KnightOS
« on: November 14, 2010, 07:57:06 pm »
Heavily compressed, probably. The real issue is how pathetic the hardware is, not just the space, right sir?
The pathetic hardware is what defines the space. ;-) But yeah.

1871
Other Calc-Related Projects and Ideas / Re: Nspire OS Risk/Weakness
« on: November 14, 2010, 07:56:04 pm »
Yeah but this is SHA-256, so it would be even harder. Especially with no collisions ever being found. Yeah...

1872
Other Calc-Related Projects and Ideas / Re: Nspire OS Risk/Weakness
« on: November 14, 2010, 07:29:28 pm »
So how hard would it actually be? Would it involve doing 2^256 trials, or is there a faster way?
Harder than factoring the number for RSA.  Not a single collision method has been found as far as we know.

1873
Other Calc-Related Projects and Ideas / Re: Nspire OS Risk/Weakness
« on: November 14, 2010, 06:32:13 pm »
So, could we attack boot2 by writing our own code, and appending more data to the end until we find something with the same hash as boot2?
If you can break SHA-256 that way, then yes.  Although it would be insanely hard.

1874
Humour and Jokes / Re: 1000 things SirCmpwn should include in KnightOS
« on: November 14, 2010, 01:55:35 pm »
I agree with 8, 10, and 11.

1875
TI Z80 / Re: TimeTools
« on: November 14, 2010, 10:20:42 am »
The hands are done via sin( and cos( in degree mode.  At zstandard, Lsin(A) gives the y coordinate for a hand L long and at the angle A.  A goes from 0-360, so for the second hand, it goes 60 times in a minutes or 360 degrees, which means it goes 1 time in a second or 360/60=60 degrees.  Also note that the pair (cos(0),sin(0)) produces (1,0) which means that you are going to have to shift the degrees by 90.  So that way, at 0 seconds, it would be (cos(0+90),sin(0+90)) which is (0,1) the correct start of the clock.  To have an offset, just add the x and y coordinates outside the sine and cosine.  Also note that that click will go counterclockwise, so you must negate the entire angle measure inside the cos( and sin( brackets.  Good luck. I would try a simple clock the size of the screen first, though.

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