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Messages - TravisE
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166
« on: November 18, 2009, 01:58:08 am »
200 MHz, cool. But in full speed batteries last how many hours?
i would just guess not very long 
In my experience, the HP 50g battery life isn't too impressive, even used normally. Then again, I use it constantly, which is probably much more than most people. But I usually have to recharge my AAA batteries at least once a week. Sometimes every couple of days under heavy use. My TI-89 could probably last two or three weeks per charge of very heavy use by comparison. I experimented with the overclocking feature with some kind of program I downloaded, but unless I was doing something wrong, it doesn't seem to work that well on my model. Oddly, most of the higher speeds actually seem to make it run slower! It seems that I read some forum post where someone else noticed that too, but I couldn't find it again. There was one setting that did make it seem to run a bit faster. However, all of the overclock settings seem to totally mess up the keyboard (keys do strange, random things) so it doesn't seem that it would be useful for anything beyond briefly running a complex calculation or something where key input isn't needed. But I'm sure even the standard 75 MHz or whatever clock speed could do impressive things for programs written directly in ASM (i.e., not UserRPL or SysRPL).
167
« on: September 12, 2009, 09:14:38 pm »
I've heard that archiveteam.org was doing some kind of project to save an entire copy of Geocities. Sites going down and taking history with them is a big deal to that group.
168
« on: September 08, 2009, 01:44:55 am »
I don't know anything about the Casio calculators really, but I enjoyed that video because I've always wondered what those color screens were like, especially when changing contrasts (I knew about them but never got to play with one in person). It makes me wonder how they work since they don't seem to work like full-color LCDs nowadays which just use subpixels with red, green, and blue backgrounds.
It seems like a cool screen. I wonder why other calcs didn't use it. Although it seems I've heard a lot of people say that the color screens in those Casios weren't all that great for some reason. It is fascinating, though, and I'm sure some neat things could have been accomplished with it with ASM, depending of course on exactly how the hardware and LCD itself worked.
I suppose that in any complex piece of software like that there might well be a way to unlock ASM programming somehow, especially in light of someone cracking the TI-81 after all this time—and without a link port, even. Discovering things like this takes a lot of creativity; you can never really say that it's impossible with absolute certainty due to the nature of software (just like you can't guarantee that any nontrivial program has absolutely no bugs at all). If there were enough people using Casios like there were with TIs, who knows? it might very well have happened.
169
« on: August 24, 2009, 07:06:03 pm »
170
« on: August 17, 2009, 06:54:01 pm »
I think so. BASIC was meant to be an easy-to-learn language (since it stands for "Beginner's All-purpose Symbolic Instruction Code"). It's not the same as TI-BASIC, but BASIC variants are generally about as easy to learn.
171
« on: July 26, 2009, 04:59:34 am »
Firefox prevented this page from automatically redirecting to another page. I got that box, too, and the funny thing is I didn't even notice it [which confirms that this feature is working correctly  ]. It was only after DJ gave people instructions on how to bypass it that I even realized there was a rickroll. Oh well, I'm a strange person, and don't mind missing out on certain types of fun. 
172
« on: July 18, 2009, 07:23:13 pm »
I've seen compact fluorescents make that sound, though in my cases it's really quiet. Probably has something to do with how they operate at a high frequency (tens of kHz). Maybe it causes vibration or something that makes the sound.
173
« on: July 17, 2009, 11:24:34 pm »
I notice that ringing in silence, too. Are your bar lights on a dimmer or are some kind of miniature fluorescent lights? Some dimmers or electronic fluorescent ballasts can make high-pitched sounds like that, too.
174
« on: July 16, 2009, 04:39:21 am »
I can hear it, but are the tiny speakers in cell phones able to reproduce that frequency?
One odd thing with high frequencies is how the loudness seems to change dramatically just by slightly changing your position.
175
« on: July 16, 2009, 04:06:31 am »
If Autoplay is enabled for USB devices, then you could probably use an ASM program to simulate an external USB drive and execute arbitrary code. Maybe.
176
« on: July 15, 2009, 09:57:57 pm »
I used to kind of organize my icons the same way back when I used Windows. Now, though, I barely have any icons on my desktop, since I always leave programs open on several virtual desktops so I never get to see the desktop anyway (why let all that screen space go to waste).  That might be also why I've been too lazy to change the background picture in months—what's the point when I rarely see it. I have buttons and a small command-line box on my taskbar thing to open stuff quickly.
177
« on: July 09, 2009, 10:41:22 pm »
ALWAYS back up, no matter what. Sooner or later you'll thank yourself, trust me. I know I did.
178
« on: July 03, 2009, 01:41:16 pm »
If you aren't yet feeling any obvious physical symptoms of not having enough sleep, then it would probably be best not to worry about it, since doing so usually just makes it even harder to go to sleep. But if you are noticing side-effects that you can definitely attribute to not getting enough sleep, and still can't get to sleep anyway, then you should probably look for advice or maybe even talk to a doctor or something.
Short periods of insomnia that occur from time to time are normal, I think, especially when stress/sickness exist, and probably aren't worth worrying about since they usually pass eventually. But if you don't get any sleep for more than a week, then it's probably time to get some kind of help just to be safe.
179
« on: June 25, 2009, 01:27:22 am »
I'll stick to the Seq( method, until someone can convert the code for me. As best as I can do without a 83+/84+, here's a program that should convert a seq( statement you give it to the binomcdf( method, assuming I understand the tutorial correctly (given that I just now learned of this trick today). It's likely not the best code in the world—I do much better in 68k BASIC. And it may need adjustment since I actually wrote and tested it on a TI-85 and tried to convert it to 83+/84+ format by downloading and checking the 83+/84+ manual. Disp "seq(
Input "Arg1:",Str0
Disp "Arg2:X
Input "Arg3:",Str1
Input "Arg4:",Str2
Disp "If no Arg5, enter 1
Input "Arg5:",Str3
Pause "seq("+Str0+",X"+Str1+","+Str2+","+Str3
String→Equ(Str1,L
String→Equ(Str2,H
String→Equ(Str3,I
int ((H-L)/I→N
Disp ":
If L-I≠0
Then
Disp L-I
Disp "+cumSum("
Else
Disp "cumSum("
End
If I≠1
Disp I
Disp "binomcdf(
Disp N
Pause ",0"
":"→Str1
For(I,1,length Str0
sub(Str0,I,1→C
If C="X
Then
Str1+"Ans"→Str1
Else
Str1+C→Str1
End
End
If Str1≠":Ans
Pause Str1Caveats: * Each argument (the part between each comma for seq( ) is entered separately. * You have to enter a 5th argument. If your seq( statement doesn't have a 5th argument, just enter 1 for the “Arg5:” prompt. * It assumes the seq( variable is X. And it does a not-so-intelligent search-and-replace to “Ans” later, so anything else that contains a capital ‘X’ in its name in Arg1 will screw up. * Output is really ugly due to very limited string commands (on the 85, at least). It's split up into lots of multiple lines. * It doesn't know when and how to combine the commands instead of using Ans (you may have to optimize that part yourself). * It always uses binomcdf( ; it doesn't know anything about not(binompdf( But maybe it can help some people get started. So, for example, for “seq(X^2,X,5,17,3)” (just making up this example for lack of a real one) you would run it, type X [squared] [ENTER] (skip the second X since it's already assumed) 5 [ENTER] 17 [ENTER] 3 [ENTER], and then if it's working correctly it should output (once you paste all eight of its tiny lines of output together into one line): :2+cumSum(3binomcdf(4,0:Ans^2 Which according to the binomcdf( command on the TI-89 TI Stats app I have, should give the same result. Or, to take Galandros's examples: For seq(2+3X,X,1,4), it returns “:cumSum(binomcdf(3,0:2+3Ans”, which can be better written as “:2+3cumSum(binomcdf(3,0”. (Galandros's example uses “binompdf(4,0”, but I believe this is an error—it should be “binom cdf( 3,0” according to my tests) seq(2+3X+X^2,X,1,4) returns “:cumSum(binomcdf(3,0:2+3Ans+Ans^2” Maybe someone could improve this further.
180
« on: June 24, 2009, 10:01:33 pm »
I think the command that took me the longest to figure out (years ago) was getKy, but that was mainly because the old manual at the time didn't have a single programming example of how to use it (like it did for virtually every other command). I had to work out myself the fact that it returns a value even when no key was pressed and how to make the program wait for a key and grab the keycode. I didn't have much trouble with anything else, I don't think, especially when examples were given.
I think of seq( as being just a limited (but potentially faster) version of a For( loop, where you can only perform a single mathematical expression, and the results are returned in a list.
I never heard about binomcdf(. If I understand correctly, you're basically just manipulating it to get a list full of 1s, right (e.g. binomcdf(4,0) returns {1 1 1 1 1})? Just like what “1+newList(5)” would do on the TI-89? And then cumSum() to convert it to a sequence like {1 2 3 4 5}, and then whatever expression you plug it into calculates it for every element in the list (1 through 5 in this case) and returns the results in a list?
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