Some infinite loops for the MC6800: BRA $FE HERE: JMP #HERE 0100: CLRA 0100: LDS #SBASE PSHA SWI INCA FFFA: 01 PSHA FFFB: 00 RTS 0100: CLRA 0100: LDS #SBASE PSHA JSR $0100 INCA PSHA 0100: LDS #SBASE PSHA WAI PSHA FFF8: 01 PSHA FFF9: 00 PSHA FFFC: 01 PSHA FFFD: 00 RTI A New WAI: to call it: CLC BCC $FE interrupt subroutine: PULA TAP SEC TPA PSHA RTI