Edit Infobox GB Homebrews: Blarggs Gameboy hardware test ROMs GB

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{{#seo: |title=GameBrew |title_mode=append |image=blarggtests.png |image_alt=Blargg's Gameboy hardware test ROMs }} A set of hardware test ROMs designed to test the Game Boy's functionalities. Originally hosted at http://blargg.parodius.com/gb-tests/ before parodious.com went down. ==User guide== OAM Corruption Test - Verifies OAM corruption bug on DMG. CPU Memory Access Timing Test - Evaluates memory read and write timing for instructions, excluding stack and program counter accesses. These tests require correct instruction timing and proper timer operation (TAC, TIMA, TMA). CPU Instruction Timing Test - Tests timing for all CPU instructions, except HALT, STOP, and 11 illegal opcodes. For conditional instructions, it tests taken and not taken timings. This test requires proper timer operation (TAC, TIMA, TMA). DMG/CGB Sound Hardware Tests - Verifies sound hardware aspects observable by the CPU. ROMs and GBSs designed for either DMG or CGB hardware due to differences. CPU Instruction Behavior Test - Thoroughly examines the behavior of all CPU instructions, except STOP and 11 illegal opcodes. Validates results and ensures other registers remain unmodified. Some sub-tests may take a while to complete. ==Screenshots== https://dlhb.gamebrew.org/gbhomebrews/blarggtests2.png https://dlhb.gamebrew.org/gbhomebrews/blarggtests3.png https://dlhb.gamebrew.org/gbhomebrews/blarggtests4.png https://dlhb.gamebrew.org/gbhomebrews/blarggtests5.png ==External links== * Official website - [https://web.archive.org/web/20160830121433/http://blargg.8bitalley.com/parodius/gb-tests/ http://blargg.8bitalley.com/parodius/gb-tests/] (archive)