RetroCompass
RetroCompass

TrimUI Brick Hammer — Custom firmware

Quick answer

Button combo

microSD swap(keep stock card as backup)

Steps

  1. 1Pick a CFW that supports the Brick/TG3040: MinUI, NextUI, Knulli or StockMix.
  2. 2Use a fresh microSD/TF card so your stock card stays as a fallback.
  3. 3FAT32-format the card and extract the CFW's BASE (and EXTRAS) to its root.
  4. 4Insert the card and boot; first boot may take several minutes to install.
  5. 5Add ROMs/BIOS to the Roms and Bios folders; emulators run on RetroArch cores.
Last verified: 2026-06-20Source: github.com

Because it is the same TG3040 hardware as the Brick, the Brick Hammer runs the same community firmware. NextUI (an actively developed MinUI fork) is popular for its clean UI and battery-saving sleep; Knulli (Batocera-based) offers a fuller, feature-rich experience but boots slower on this modest hardware; MinUI keeps things minimal; StockMix is a community stock-OS mod. Most install by copying to a FAT32 card root — no PC flasher needed — and keeping your original card lets you switch back any time.

FAQ

Which custom firmware supports the Brick Hammer?
The same as the Brick (TG3040): MinUI, NextUI, Knulli and StockMix all run on it. CrossMix-OS targets the Brick/TG3040 too, but confirm the current release lists the Brick before flashing.
Can I go back to stock?
Yes. Because CFW lives on the SD card, swapping back to your stock card (or re-flashing the SD base package) returns you to TrimUI OS.

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