GUI: CPU

CPU Panel

This panel configures the Main Processor (CPU) emulation.

CPU Settings

CPU Model

Selects the 680x0 processor family.

• 68000: A500/A600.
• 68020: A1200/CD32.
• 68030/68040: High-end accelerators.
• 24-bit addressing: Restricts address space (Required for 68000/020 compatibility).

FPU (Floating Point Unit)

Selects the math coprocessor (None, 68881, 68882). Most games do not use an FPU.

CPU Speed

• Approximate A500/A1200: Attempts to match the original speed (Cycle-Exact). Best for compatibility.
• Fastest Possible: Runs as fast as the host CPU allows. Great for Workbench or 3D games (Frontier, Doom).

JIT (Just-In-Time) Compiler

• JIT: Enables dynamic recompilation of 68k code to native host code (ARM/x86).
• Performance: Provides a massive speed boost (emulates a 68060@1GHz+).
• Compatibility: Low. Many old games will crash. Use only for Workbench/Applications.
• JIT Cache Size: Memory allocated for translated code (8MB is usually enough).