In human terms: The core tried to reserve a critical memory block for audio/SPU emulation but was denied.

The majority of "Core Stopped" errors in ePSXe and RetroArch are caused by the video driver conflicting with your GPU.

typically occurs when the emulator encounters an "unknown opcode," essentially a piece of game code it cannot process

This error essentially means the emulator's "brain" (the core) has crashed because it received a command it didn't understand, often due to incorrect CPU settings or a corrupted game file. Primary Fix: CPU Overclocking Adjustment

If the core stops immediately upon booting:

Try clicking the button at the bottom left to apply stable default settings.

The error message "" typically occurs when the emulator encounters an unknown opcode , meaning it tried to execute a command it did not understand. This is often a sign of a bad game file, incorrect CPU settings, or BIOS issues. Analysis of Section 3.1.6