lblpushRS BSET PC ORG @ 0x12 + ! ( pushRS )
    IX INCd, IX INCd,
    0 IX+ L LDIXYr,
    1 IX+ H LDIXYr,
    RET,

PC ORG @ 0x15 + ! ( popRS )
    L 0 IX+ LDrIXY,
    H 1 IX+ LDrIXY,
    IX DECd, IX DECd,
    RET,