CODE *  ( DE * BC -> DE (high) and HL (low) )
    DE POPqq, BC POPqq, chkPS,
    HL 0 LDddnn,
    A 0x10 LDrn,
( loop )
    HL ADDHLss,
    E RLr, D RLr,
    JRNC, 4 A, ( noinc )
    BC ADDHLss,
    JRNC, 1 A, ( noinc )
    DE INCss,
( noinc )
    A DECr,
    JRNZ, -14 A, ( loop )
    HL PUSHqq,
;CODE
