isn't it a HAM6 production ? I guess so. It means when you see 160 pixel it means in fact a 640 pixel HAM mode,
and when you see 320 pixel HAM it is in fact 1280 HAM6 pixel mode. This is a tricky c2p, you got 4 hard pixel for 1 real pixel, but then no nasty HAM color overflow. It uses lots of chipram, it can explain the slow down even with 68060. Greetings again to loonies.
Hey, if you can watch java applet, run to Pr ken perlin homepage:
http://mrl.nyu.edu/~perlin/
Two oh his applet use the same trick :
http://mrl.nyu.edu/~perlin/experiments/violet/
http://mrl.nyu.edu/~perlin/experiments/fiend/
Ken perlin is an unversity professor, he experiments a lot of demo-like effect. All his applet show experimentations with real time software engines under java, and usually he gives sourcecode for each !!! I got a lot of respect for him.
K.Perlin discovered lots of algorythm commonly used in 3D render since the seventies (character skinning, procedural textures) and was involved in the movie "tron". ( I guess the tron motor racer game must be one of his crazy idea, it smells like perlin spirit. )