I remember playing that in high school! That's really impressive use of the tech, and was staggeringly impressive to me at the time. Learning z80 assembly on th

I remember playing that in high school! That's really impressive use of the tech, and was staggeringly impressive to me at the time. Learning z80 assembly on the TI series got me into programming at an early age. It's worth pointing out that the TI-83(+) contains a proper z80, running at 6MHz, with full support for the z80's extended instruction set and 16-bit arithmetic functions, which certainly helped this game out quite a bit. The Gameboy itself is somewhat underpowered in comparison; its Sharp80 processor is considerably stripped down, lacks most of the extended instruction set, and runs at a slower 4MHz. Given these limitations, I'm (a) staggeringly impressed to see Wolfenstein running on the thing in any capacity, and also (b) totally understand why the coprocessor is necessary to make it work, especially at that buttery smooth framerate. There's no hardware graphics scaling for one, all tech demos I've seen that do scaling appear to be doing so entirely in software and using hblank trickery to speed things up a bit. Doing a raytracer without hardware scaling for the texture lookups (or any ability to rewrite VRAM mid-scanline for that matter) would be pretty tough. It's also curious to point out that this probably wouldn't be possible on the Black and White Gameboy (Pocket); from his frame disassembly, he's using the arbitrary DMA copy hardware exclusive to the Gameboy Color, and I don't think a straight sharp80 copy routine would be able to complete all 120 tiles during a single vblank and still have any room to do much of anything else. I'm presently working on a Gameboy Emulator in Lua, and it seems like this is another esoteric cartridge I'll have a ton of trouble supporting. An entire additional CPU inside the cart! What sorcery :) http://bgb.bircd.org/pandocs.htm#gameboytechnicaldata http://bgb.bircd.org/pandocs.htm#gameboytechnicaldata https://en.wikipedia.org/wiki/TI-83_series#Technical_specifications https://en.wikipedia.org/wiki/TI-83_series#Technical_specifi...