Hmm, what is "Jim E's Tilemapper" ?

It's the tilemapper Jim e wrote, it's fast and can handle large jumps (from 1 pixel to... i dunno how many, maybe 255?). Hot_Dog, i was under the impression that it redrew the map every time, i dunno how else he would've done the parallax scrolling demo with all the animations. I've never actually used it and it's been ages since i looked at it, do you have a link to it somewhere?

Unfortunately I don't.  I do know that you can redraw the map every time or simply have it scroll (because it uses a buffer)

From what i recall Jim's mapper prerotates the tileset for speed. It would require RAM proportional to how many tiles you had in this case.

Im sure i have it at home, ill look when i finish work.

It works on the same principal as DWedit's mapper, but Jim added layers etc.

EDIT - Didnt calc84maniac write a layered mapper as well?

In the past ive used a 2KB LUT to save on having to rotate each tile byte, basically each combination of 0-255 prerotated. Then just mask out the bits you dont need when copying. You could save on the masking with a 4KB LUT but that might be overkill for the benefit.

tr1p1ea, how do you get a LUT of 2kb? If each tile is 8x8, 256*8=2048, and that's just the basic tiles, non-rotated... CrASH's mapper did something similar, too, i believe (prerotating the tileset).

Ahhh that makes much more sense. That's clever

Thats how my sprite routines usually work (if its a project that doesnt use a LUT).