What does JP (HL) exactly do? 1. PC (Program Counter) is what is at 'adress HL' (jumps to (HL)) 2. PC is HL (jumps to HL) I ask this because in the ROM (1.10) the last ROMcall in the jumptable is: 52E5h: EXECUTE_Z80: ; from Squish.inc LD HL,9327h JP (HL) And ehm, I always thought that JP (HL) did the first thing I mentioned, but with the example it is probably the second.