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0.0 fps · 1×
Cartridges
open-source homebrew · or drop your own .gb / .gbcYour own ROMs stay in this browser: they are read locally and never uploaded. Battery saves persist here too.
CPU · SM83
—Frame timing · 154 lines × 456 dots
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OAM scan
drawing (stretches with SCX, window, sprites)
HBlank
VBlank
beam
All 384 tiles in VRAM ($8000–$97FF), shaded through BGP. Tile data being rewritten shows up here the moment it lands.
Untick a channel to mute it. Levels are the digital value each channel feeds its DAC (0–15).
Hover a cell to see the instruction.
Every executed instruction since this tab opened, by opcode (top: base set, bottom: CB-prefixed). Darker is hotter, on a log scale.
Value finder
not startedFind where a game keeps a number: start a search, play until it changes, filter, repeat. Click an address to show it above and break when something writes to it.