PCSX4ALL is a port of the Playstation emulator PCSX by dmitry_smagin for the GWC Zero. A PSX bios is required, but it does not come with the pack and we don’t know either where to get. Please read the instructions very careful.

Changes:

– Fixed root counters code (taken from pcsx_rearmed), this improved timings and made the whole emulation more accurate. As a result, input is no more getting stuck occasionally in Cotton and Metal Slug X. (senquack)

http://boards.dingoonity.org/gcw-releases/pcsx4all-2-3/