Poke_Transporter_GB/menu_bars.grit at code-cleanup - Poke_Transporter_GB - Gitea: Git with a cup of tea

Leahnaya/Poke_Transporter_GB

mirror of https://github.com/GearsProgress/Poke_Transporter_GB.git synced 2026-10-23 07:53:18 -05:00

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easyaspi314 f3a164076d Cut VRAM usage roughly in half

Memory manufacturers and AAA game studios hate her!

With some clever rearranging, PTGB now uses only 36 KiB of the 64 KiB
BG VRAM. This means the remaining 28 KiB is free to use in the future.

Caveats: The flex tileset must not use more that 6 KiB. There is a check
for it added.

VRAM Map
  06000000 - 06000800 ( 2K): Eternal backdrop and textbox tileset
  06000800 - 06002000 ( 6K): Flex BG tileset
  06002000 - 06002400 ( 2K): BG0: Backdrop tilemap
  06002800 - 06003000 ( 2K): BG1: Flex BG tilemap
  06003000 - 06003800 ( 2K): BG2: Textbox tilemap
  06003800 - 06004000 ( 2K): BG3: Text tilemap
  06004000 -~06009000 (20K): Text rendering bitmap
  06009000 - 06010000 (28K): Free work RAM
  06010000 - 06018000 (32K): Sprite tileset

Additionally:
- Explicitly clear VRAM on boot
- Dirty workaround to fix box drawing buffer overflow.
- Flex backgrounds use a table instead of a huge switch statement
- Textbox tile IDs are now const u16[] instead of int[]

2026-07-02 16:20:19 -04:00

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 #
 # Text Box (Background) : 64x64t, 4bpp, SBB-layout, not compressed.
 # Pallet bank 2, copy from 32 to 48.
 #
 -gt -gB4 -gzl -mR4 -mLs -mp2 -ma64 -mzl -ps0 -pe16