How much new code had to be written?

Good question. I'd imagine that a LOT of work would have to go into something like this. It's way harder than writing tron. ;-) I also wonder how LONG it took him to port the program. That's cool...

Though, this might have helped some... VTI was coded in C++, right? Well, I think the programming language for palms is C (I don't know much about palms, apparently). So... the similarity in the languages probably made it easier, in the sense that he could modify the code, rather than re-writing it completely. That would take VERY long. I am interesting in seeing how this program works. But... that would be hard. Maybe if I got a palm emulator so I could emulate my TI-89, which I already have by itself AND on an emulator... phew, that's confusing. Heh, I think I'll just use my TI-89. :)

Pocket PCs are VERY different from Palms. Rusty had an initial port of VTI to the Palm, but there were issues due to not being able to allocate a 64k block of memory. Pocket PCs are about a hundred times faster than a Palm.

PocketPCs run WindowsCE, which shares a lot of the APIs with Windows. Programs are written in C++. I think the hardest part is adjusting for input and output on the device, since pocketPCs have plenty of memory and speed.

Are there any Linux distributions for PocketPC

I don't Doubt it, but that said it would would be very limted as the devices would have real trouble trying to run KDE or GNOME. I'm not even sure you could run a X server on a pocket PC.

Sure, there is. Check out link in URL above. I know it works on iPaqs, not sure about other PocketPCs.

You also have to consider that there are PocketPCs out there with many different kinds of CPUs. So if you write core parts of an amulator in ASM code (which is not unusual, AFIAK), you need to write different versions for different CPUs.

All asm in a well-designed program would probably be relegated to small low-level functions with very specific purposes, so it's not a big deal to port it. (I don't know if VTI is very well-designed, but it probably is)

I thought this was such a great idea i set off to find websites in honor of it...click the link to see what I found...don't look at the URL though, it will ruin it.

What the heck? LOL!! Is youaremyfriend a site that creates flash animations for free, like that? I must look... That's cool :)

all you have to do is go to word1.word2. youaremyfriend.com
"word1" is the first word of your "friend" (VTI in this case) and "word2" is the second word (pocket) thus if you wanted to tell Joe Bob he was your friend, you would have him go to joe.bob. youaremyfriend.com ... go to www.youaremyfriend .com for a better explanation if this doesn't make sense...

Funny way of passing arguments ;)

Haha, that's so easy... you don't need to set it up or anything? You just type in the URL? Let's see if this works, then...

Darn... the text box wouldn't let me type in my >150 digits of pi. :'(

I wish I had a pocket PC, but then again, I already have a REAL TI-89.

BTW, I asked the author about compiling the program for the older Palm-Size PC's (the predeccor to the Pocket PC), and he says the only thing keeping him from doing so is the slow processor- and he's right, the MIPS 4100 in my Cassiopeia goes unbelievably slow.

Someone should port TIGCC to Pocket PC, maybe I should...

I finally got some time to try out the emulator.
On my iPaq 3670 (ARM, 206MHz, WindowsCE2000) it loads up fine. When I press the ON button the calc screen flashes neon green, then familiar calculator-screen green, but nothing more happens. I'm using the .tib file mentionned in the README. Anyone else have similar issues?

Increase the contrast. I had the same problem too. The only thing is I have an iPAQ 2215 and it still runs really slow. I mean come on, it has a 400 MHZ processor!

Thanks for the info. Unfortunately I think that you can't change the contrast on iPaqs (or I haven't figured out how)

I think he mean in the emulator. Increase the contrast using the buttons in the emulator. diamond and +/-

Thanks a lot for the tip. I feel like an idiot (you can probably tell I don't use calcs too much anymore).

Anyways, the result looks great. True, it's very slow, but for calculations it isn't too bad. It's still got a few kinks though - the screen doesn't refresh as often as is needed and the menus have faded sections, but hey, if it's going to solve my diffeqs, I'm game!

Hmmmm, your luckier than me than. I can barely get it to run. Entering 2 + 2 <enter> takes me ~5 min!

Hey can someone give me a URL for the version 1.0, or w/e workes, ROM image. I have tryed the newest ver 2.09 or w/e and it doesn't work. So then I tryed and old ver 2.05 and it also doesn't work. So if someone could help me out, ya... that would be great. I will even make a youaremyfriend.com for them with there name!!! LOL, ya...

Yes, after looking for hours for the old rom image version I have finally found it. So if anyone needs it and has a calc with the newer versions like me, then just DL from the above link.

OK, so what is a .tib file exactly?

It is a type of ROM image format.