DocBoy vs Gearboy

DocBoy is a free, open-source Game Boy emulator written in C++17. It emulates the original DMG Game Boy and Game Boy Color, with M-cycle-accurate CPU emulation and T-cycle-accurate PPU emulation using a Pixel FIFO. Supported cartridge types include NoMBC, MBC1, MBC2, MBC3, MBC5, MBC7, HUC1 and HUC3. Its frontends provide save and load, save states, fast-forward, configurable palettes, screenshots and an SDL graphical menu. An optional GDB-style command-line debugger offers disassembly, breakpoints, watchpoints, stepping, rewind and memory viewing. DocBoy can also operate as a libretro core through RetroArch. Releases provide Windows and Linux executables, while the project documents an Android libretro build; RetroArch is described as supporting Android and iOS. Save states, link cable emulation and a real-time clock are listed. The project says perfect emulation remains distant and accuracy can affect performance. It uses the MIT license and accepts bug reports and proposals through issues or pull requests.

Gearboy has no write-up on Specifiction yet; its figures are above.