collapseos/blk/321

    BEGIN, ( loop )
        SCF,
        C RLr,
        RLA,
        HL ADCHLss,
        DE SBCHLss,
        IFC,
            DE ADDHLss,
            C DECr,
        THEN,
    DJNZ, AGAIN, ( loop )
    B A LDrr,
    HL PUSHqq,
    BC PUSHqq,
;CODE