Constants for the size (in bytes) and length (in pixels) of a tile

[Rangi42]

A tile in VRAM is 8x8 pixels, so 16 bytes at 2 bits per pixel. Constants for these measurements would be useful, and would pair well with the screen-size constants.

[ISSOtm]

I'd use “width” and “height” for the names; even if those are both intrinsically the same, they 1. provide extra semantic value, and 2. are much more distinguishable from “size” (which is very often used interchangeably with “length”).

[Rangi42]

Maybe just provide TILE_WIDTH, so a redundant TILE_HEIGHT doesn't cause confusion ("wait, is there ever a circumstance where width as opposed to height matters?") or a split over which one to conventionally use.

[Rangi42]

As well as TILE_SIZE_B for the size in bytes (16), which matches SCRN_X_B, SCRN_VY_B, etc.

[ISSOtm]

There won't be a split, the height will be used for heights and width for width. They are not redundant merely because they are identical, otherwise we would define def EIGHT equ 8.

[Rangi42]

They would be redundant because squares have one side length that describes both their width and height. We just want to avoid calling it "length" to avoid confusion over the "byte length".