Tuesday, June 22, 2004

Old demo coders become new virus coders?

Slashdot posted to Farb-Rausch Releases PC Demo Creation Software
as Old demo coders become new virus coders?:

I tried disassembling one once first thing it did was copy code to the old specky print buffer delete this loader code move everything down a bit and then proceeded to unfold itself up the memory incredible. pretty good to watch too as the primitive hardware started doing things which just seemed impossible.

I wonder how many of the demo and other assembly programmers from the old 65xx scene ended up in the virus authoring scene of the 90s? It's pretty clear from the badly-coded worms that few real programmers are participating in that realm.

I know I learned assembly, patching interrupt vectors, and self-modifying code from writing game intros and "trainers" for C= BBSes.

Pretty much everybody in the C64 assembly programming scene used the "copy your bootstrap into the tape/disk buffer, then shift the rest of your data to fit", as well as the well-documented technique of running your main loop out of "page 0" to take advantage of the faster execution time.


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