EDIT: offe was faster ;D But anyway: Yes, this should work anyway. No, it`s no one-to-one wiring! Please take a closer look: http://www.ucapps.de/mbhp/mbhp_4xsid_c64_psu_optimized.pdf After MIOS is loaded, try the interconnection test (follow instructions in main.asm) BEFORE plugging in the SID.