Pan Docs, “Pan Docs: Window”

Cite as: Pan Docs, “Pan Docs: Window”
Original: https://gbdev.io/pandocs/Window.html
sha256: f94f79d7cf8d028ad341c99ea4f9a2560bf27c08f6ba2bb1fd06f2e65df6bacb
Archived: https://web.archive.org/web/20260418214557/https://gbdev.io/pandocs/Window.html
Accessed: 2026-10-21
Licence: CC0-1.0 (the gbdev/pandocs repository's license)
Credit: The Pan Docs authors, begun by Pan of Anthrox and maintained by the gbdev community; see https://github.com/gbdev/pandocs/graphs/contributors.
Notes: Read from the live page as deployed from the pinned master commit. Used for WX and WY and how the window covers the background.

Cited on

The window is a second background layer whose top-left corner sits at screen position (WX − 7, WY), set by WY and WX (`$FF4A`-`$FF4B`); it can't be scrolled and always starts from its tile map's top-left tile. From the line where LY equals WY, the PPU switches from the background to the window when the line reaches WX, drawing the window's current row, and that row advances once for each line the window is drawn on; at WX 7 and WY 0 it covers the whole background.	`FF4A–FF4B — WY, WXWindow rendering criteriaWindow rendering criteriaWindow mid-frame behavior`	Wiki