There are three main limitations:
- Memory usage is high because of the copying collector. I will implement mark/sweep/compact collection for the oldest generation soon.
- Network sockets and non-blocking I/O is not supported yet. I need to finish off Doug's
io.windows.cecode for that to work.
- Factor must be run from inside the command prompt. The command prompt is awkward to install and use. Eventually I will port the Factor UI to Windows CE, in some cut-down form, and you'll get a nice listener instead.
You can download a binary package I threw together. It includes the command prompt, which might not be legal. To run it, you must follow these steps:
- Unzip the ZIP file on your phone; root directory is the easiest place, otherwise you'll be typing full pathnames all the time (Windows CE doesn't have a "current directory" concept).
pocketconsole.arm.cabto install the console driver.
- Open a registry editor such as TRE, and change the
HKEY_LOCAL_MACHINE\Drivers\Console\OutputToto the number
- In the command prompt, run
- If you want, copy the
extradirectories from the Factor 0.91 sources, so that you can load external modules.
Annoyingly error-prone and long-winded? You bet! Soon you'll just be able to double-click on
factor-ce.exeand it will start an UI listener, but for now the command prompt is as good as it gets.
To help with code input on the small dinky cellphone keyboard, I loaded some shortcut definitions. So now you can write
u tools.timeinstead of
USE: tools.time, etc.
Now, where does Lie algebra cohomology come into this? Well, I tried running
extra/koszulon the phone, and it works fine. This is probably one of the least practical things I have ever done in my life, but it is a good way of testing whether a non-trivial program can run.
Playing around with
extra/koszuland math stuff on the phone made me wonder. A modern cell phone has a much higher resolution (not to mention color) screen compared to a graphing calculator. Furthermore it has more RAM and a faster CPU. For example, the TI Voyage 200 is rather bulky and only has 188K of user-available RAM. My phone has more than 300 times that. The TI-89 is pretty much the same but with a different form factor. The calculators have an advantage when it comes to input, but perhaps predictive completion, handwriting recognition and the iPhone multitouch can narrow the gap there. A good CAS for cellphones and PDAs could cut into HP and TI's business...