mcpx_1.0.bin is exactly in size. The MCPX ROM occupies the last 512 bytes of the memory space, overlaying the top of the BIOS region.
If RRoD 0022 (Southbridge failure) is caused by corrupted firmware, reflashing can fix it. But if the chip is physically overheated, no firmware will help. Mcpx-1.0.bin Bios
Modern emulation efforts preferentially target because its RC4 pipeline has been reverse-engineered down to the individual bit, offering excellent compatibility across multiple virtualization backends. Verifying a Clean vs. Bad Dump (MD5 Hash Check) mcpx_1