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Messages - TravisE

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106
Humour and Jokes / Re: If TI made a microwave...
« on: November 23, 2010, 05:14:04 pm »
48. Meals would come out monochrome, only consisting of charcoal and ash. If you use assembly, then you can get food in grayscale, or blue food.

Haha, that's my favorite one so far.  ;D

107
Computer Usage and Setup Help / Re: Cpu Fail
« on: November 23, 2010, 05:09:54 pm »
Yeah, the only laptop I had (not including my current netbook) back around 2001 to 2003 or 2004 didn't last too long, either. I used it all the time (it was my main computer at the time) and tried to take care of it, but something new always seemed to go wrong every few months. :D Eventually, the whole power supply circuitry finally gave up, and it was pronounced dead after barely limping along for the previous year or two. (The 10 GB HDD survived, though, and I actually used it in my desktop computer for a while a couple of years ago using an adapter I found in a computer store.) Nowadays, I pretty much shy away from laptops completely due to that experience.

I think the main problems with laptops is that they're constantly being moved and banged around, there is a ton of major heat-producing stuff crammed into an insanely tiny space with virtually no room for any effective cooling/ventilation, and everything suffers because of it. Come to think of it, it's perhaps a bit amazing they even manage to last as long as they do. ;)

108
Humour and Jokes / Re: If TI made a microwave...
« on: November 23, 2010, 04:45:39 pm »
n: The latest “Nspire” model would be released claiming to make all previous models obsolete despite having far fewer features and more limitations

n+1: Every operation on this new model would have to be typed as function names with arguments (e.g., “cook(3, 100)” (three minutes on high/100%), “stop()”, “opendoor()”) followed by Enter because of the lack of a getKey function

n+2: Someone would release a project to allow third-party ASM programming in order to address the above issue, but TI would keep releasing OS updates in an attempt to stop it and/or threaten with DMCA notices

n+3: The timer could only be set in increments of one minute, even though the earlier models let you enter times in minutes and seconds

n+4: Fortunately, you could just plug in an 84+ keypad and use the much simpler, more convenient interface that the previous 83+/84+ models had instead

n+5: There would be a child safety lock feature called “push to test” that would prevent the microwave from activating, but you'd have to get a special link cable and connect to another microwave of the same model when you wanted to use it again

109
Other Calculators / Re: Sound for calculators with bad ram
« on: November 23, 2010, 04:15:21 pm »
I went ahead and approved the file since I haven't been rejecting files with links in descriptions in the past. If you want to remove the URL from the description, let me know and I can do it, or you can simply upload an update with an updated description (file upload form should be working again now).

110
Other Calculators / Re: Sound for calculators with bad ram
« on: November 20, 2010, 04:47:10 am »
Travis Evans told you on IRC the other night to not put the link in the file description, so you would probably have to put it in the readme. I think links messes up their description systems. Just put a link in the readme and they'll be fine.

Thanks for passing the word along. Until this question was asked, I hadn't really thought much about URLs in ticalc.org file descriptions; I just went ahead and approved them. But when I looked back in the logs, it turns out that some file archivers in the past did reject files for having URLs in the descriptions. There are a couple of issues: first, they can't be formatted as links (so users would have to manually copy and paste the URL to get to the page), and if the URL happened to be really long it could screw up the page formatting. So my conclusion is that it's maybe best to have the links in the readme or as a link in an HTML file in the ZIP somewhere or something similar that the description can point to.

111
TI 68K / Re: TIOSMOD: a computer-based patcher for TI-68k OS (for now)...
« on: October 24, 2010, 09:58:21 pm »
I've gotten pretty busy lately and have been having some trouble keeping up with a lot of things, even with processing pending files which normally isn't a problem (plus there's been a sudden increase in submitted files lately), but I expect to be able to make more headway eventually within a few days. You guys just have to be patient with me and give me a chance to test, research, write about, and format these things for posting—it can be quite time-consuming. I'll make a best effort to try to have the rest of my pending feature queue flushed out in time for POTY voting.

112
Other Calculators / Re: Battery in my calc exploded
« on: October 18, 2010, 09:25:47 pm »
Well, $12 for 850 mAh was Energizer (talk about brand pricing :P), and the $6 one for 1000 mAh was from Polaroid.

EDIT: Just realized, they're actually 850 and 1000, respectively.

I once got a pack of Polaroid for about that price at Wal-Mart. Usually, all I see there is Energizer, though. I personally stay away from Energizer rechargeable now because I haven't had good experience with them. Compared to all other brands I've used, the Energizers have given me much fewer charge/discharge cycles before wearing out.

I recently got really lucky and went to a local battery shop and found Sanyo Eneloop “pre-charged” (i.e., low self-discharge) batteries. In the online hobbyist community, this brand seems to have a reputation of being very high quality, but they tend to be very hard to find.

113
Other Calculators / Re: Battery in my calc exploded
« on: October 18, 2010, 08:59:11 pm »
Having that happen to me would definitely startle the heck out of me. It could be a close call for sure—I once (around 10–12 years ago) saw a story on the news about a children's toy with a battery compartment where the springs were somehow damaging the battery's insulation and causing it to get shorted out. The guy who had taken them out said that the moltern battery guts got squirted right in his face or eyes.

I prefer Duracells as they seem to last longer but at like $8 per battery set (4 AAA's) I prefer the $1.49 sets of 12 batteries at the dollar store. I didn't have problems with them yet and in the end I end up saving money despite the fact they last like 4 times shorter.

Ouch, seems expensive over there. Where I live (though I don't know what the difference between U.S. and Canadian dollars is right now), a few bucks more than $8 will get you a pack of 4 AA or AAA NiMH rechargeables. That's what I've been using for years now for almost everything, because I go through batteries quickly and this way I only have to buy new ones every few years instead of every few days or weeks. In some devices like TI calcs, though, it's tricky because the battery low warning doesn't take NiCd/NiMH characteristics into account, and the calc can end up dying without warning when they run down, in some cases causing a RAM clear. To avoid this, I just get in the habit of swapping them out for recharging every so often before they have a chance to get low.

114
Other Calculators / Re: Battery in my calc exploded
« on: October 17, 2010, 04:57:06 pm »
The material in an alkaline battery is actually alkaline, though, which is the opposite of acid (hence the name). ;) Still, though, it's an irritant and corrosive to some materials, so be sure to clean it up anyway. :)

Although I've never seen it happen firsthand, one thing I've heard of quite frequently over the years are TI calculators that seem to drain batteries in an excessively short period of time for no apparent reason. I guess somehow something in the calculator circuitry develops a defect that draws excessive current from the batteries in these cases.
I know DJ's 83+SE had this happen to it. :(

Yeah, I think I also remember Netham45 mentioning on IRC the other day that he had a calc that not only did that, but made the batteries hot in the process. It would be interesting if someone hooked up an ammeter or ohmmeter to a calc doing that to see what the current draw/resistance is at the battery terminals compared to a properly functioning calc.

115
Other Calculators / Re: Battery in my calc exploded
« on: October 17, 2010, 04:27:43 pm »
You shouldn't have this problem with rechargable batteries because they are nearly immune to exploding...

Well, I wouldn't be too quick to say that—any type of battery is potentially dangerous if defective or abused (e.g., incorrect charging, drawing more current than it is designed to safely do, etc.)

116
Other Calculators / Re: Battery in my calc exploded
« on: October 17, 2010, 04:09:58 pm »
Does the warning stay on persistently or just show occasionally? Also, alkaline or rechargeable?

Whoops, misread the post.

That was probably due to the cell that exploded, due to whatever made it explode. If it was a short of some kind, it probably drew enough current to drain the battery very quickly and pull down the voltage too much. If it happened right after you put in those batteries, and the explosion occurred much later, that might be evidence that it was the battery itself that was defective in this case.

117
Other Calculators / Re: Battery in my calc exploded
« on: October 17, 2010, 03:53:07 pm »
If it was an internal short, you probably don't have a calculator anymore. It takes a lot of heat to break the battery compartment as compared to what the electronics can handle. Although, if TI was smart, they had temperature shutoff circuits installed into the processor to prevent overheating. Not much chance of that, though.

If it was an intracell short, then you may or may not have a calculator depending on exactly what happened.

If it was software, then you almost certainly don't have a calculator. Software is notoriously bad at regulating batteries.

Ah, I was probably a bit ambiguous there. I was thinking of a short internal to the cell itself, though I don't know whether that's actually common with alkaline cells (I've never heard of it, personally). It sometimes happens with rechargeables, though I think it's rare for the internal short to actually draw enough current to generate that much heat and an explosion (usually, the symptom is simply a cell that completely drains itself in a matter of hours or days after a full charge, even if not used—I have a few worn-out NiMH cells that exhibit this condition).

It seems unlikely, but maybe somehow a battery terminal or something shorted the terminals of that one cell together. I think I've heard of a rare case or two before of a poorly-designed battery compartment damaging the insulation on the cell and causing this, leading to a product recall.

Although I've never seen it happen firsthand, one thing I've heard of quite frequently over the years are TI calculators that seem to drain batteries in an excessively short period of time for no apparent reason. I guess somehow something in the calculator circuitry develops a defect that draws excessive current from the batteries in these cases.

118
Other Calculators / Re: Battery in my calc exploded
« on: October 17, 2010, 03:17:14 pm »
That might happen if the battery terminals got shorted together somehow by something metallic. Or maybe it was a very strange defect in the battery or it somehow developed an internal short or something weird like that.

119
TI 68K / Re: TIOSMOD: a computer-based patcher for TI-68k OS (for now)...
« on: October 17, 2010, 03:08:42 pm »
Whoops, I totally forgot about this topic. Very nice updates. I'm definitely going to want to remember to try this out at some point. :)

120
News / Re: Casio Prizm - Color graphic calculator
« on: October 11, 2010, 11:17:06 pm »
From what I remember, platforms like the Nspire and modern PCs tend to copy ROM to RAM because RAM is faster, but my understanding is that the Z80 and 68K calcs execute most code directly from flash ROM (though archived variables and programs are temporarily copied to RAM on the 89/92+/V200; probably the same with Z80s but I'm not really a Z80 person). I figure the processors in those calculators are not fast enough for the speed difference between RAM and ROM to have a significant impact on performance.

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