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Tiny Saturn demo

mic - Sep 10, 2008

		mic	Sep 10, 2008
		Size optimization on the SH can be a bit tricky, but I thought I'd give it a go and you can find the result here: http://jiggawatt.org/badc0de/satgegga.zip... It's a variation of a 256-byte DOS demo that I wrote earlier this year, and the Saturn version is currently 484 bytes, which I think is pretty decent. Tested and works on a real Saturn (upload to 0x6004000), source code is included..

		mic	Sep 11, 2008
		Well, there's (almost) always room for improvement. It's down from 484 bytes to 432 bytes, and still works on HW: http://jiggawatt.org/badc0de/satgegg2.zip...

		vbt	Sep 11, 2008
		Well done Mic what about a 400 bytes target

		mic	Sep 14, 2008
		Since the effect is based on a sine table and the Saturn has no FPU, about 100 of the 432 bytes is spent on code+data to generate the sine table. If there had been a way to do 32-bit division with a single instruction perhaps a Taylor series approximation could've been made, but on the SH2 it would probably require even more bytes. Perhaps a few bytes here and there could be optimized away, but nothing major, unless the appearance of the effect is changed (e.g. generate a simpler palette).