CODE >R
    HL POP, 17 BCALL, ( 17 == pushRS )
;CODE
CODE R>
    20 BCALL, ( 20 == popRS ) HL PUSH,
;CODE
CODE 2>R ( 0xa9 )
PC ORG @ 0x35 + ! ( stable ABI JP )
    DE POP, HL POP,
    17 BCALL, ( 17 == pushRS ) EXDEHL, 17 BCALL,
;CODE NOP, NOP, NOP,
CODE 2R>
    20 BCALL, ( 20 == popRS ) EXDEHL, 20 BCALL,
    HL PUSH, DE PUSH,
;CODE