> Or you do not consider MUL/DIV "arithmetic", or something.
Multiplier and divider are usually not considered part of the ALU, yes. Not uncommon for those to be shared between execution threads while there's an ALU for each.
Even on NES a lot of games use CHR-RAM so arbitrary bitmaps are at least possible, though only a small part of the screen is unique without some rarely used mapper hardware. Zelda and Metroid mostly just use this to compress the graphics in ROM, Qix is a simple example with line drawing, Elite is an extreme one.
I made a demo of the Mystify screensaver using the typical 8KB CHR-RAM. Even with a lot of compromises it has pretty large borders to avoid running out of unique tiles. https://youtube.com/watch?v=1_MymcLeew8
Funny because I rewrote a bad port of dragons lair for a custom console with a tiny engine and huge dataset relatively, each frame having one "if press X goto frame Y" instruction.
Not really, no. The ground isn't moving. I'm not moving. I get that if the ground wasn't there, I would be moving, but that's not the same thing, I think?
Like I said in another response, I have always been told that acceleration is change in velocity over time. If my velocity is not changing, I don't understand how I'm accelerating?
I do understand that gravity exerts a force that is indistinguishable from acceleration, which was my original point. But that doesn't mean it is acceleration.
Multiplier and divider are usually not considered part of the ALU, yes. Not uncommon for those to be shared between execution threads while there's an ALU for each.
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