The better version of this is just to create lots of appvars, all the same name. (you shouldn't be able to do it, but using "prgmVAR" rather than the correct "vVAR" does the trick.) It doesn't crash your calculator, it just can slow things down a lot and it makes it a pain to delete them, since you go in, delete it, it looks like it's gone, you go in, it's back, you delete it, and so on.
And yes, whyever would you want to clear someone's RAM?

I'm no artist, so here's the best I can do, with two spikes. (No photo-realism, I know)
The only change I may make is make the base shorter.

Also, that looks interesting, Raylin

How many spikes in one tile?

Can we make announcements of these streams? Maybe in the topic on #omnimaga? I always seem to miss them...
At any rate, I hope we (well, brandonw) will be able to find out more about this device.

Efficiency or readability... hm... You could always just make a special hex editor that supports masked sprites and gives the hex for both masks.
Also, something that wasn't mentioned: you can also use such masking to invert areas, in addition to white, black, or untouched (transparent). With what builderboy mentioned, in the second mask you put black where in the first mask you put white, and, while it cannot be done with DJ's method as-is, replacing that final OR with an XOR and using black where there was white the first mask does the trick.

I only have the rest of the week unless I fail any EOC's/exams. (I'm counting days for finals as days of school)
And back on topic... (well, sort of) I can't wait until more work is done on this. Keep up the good work!
I don't know if this has been said, but just having this as a mini-physics playground (like phun, but scaled down a lot) would be pretty awesome.

Nice to know. thanks for the info.
Goodness, if it weren't for the existent of a large niche market (kind of an oxymoron, but whatever) for calcs, they (and we) would be gone... Calcs are nice because assembly is, compared to most other systems, rather easy.