collapseos/blk/292

    BEGIN, ( inner )
    ( DE is a wordref, first step, do our len correspond? )
        HL PUSH, ( --> lvl 1 )
        DE PUSH, ( --> lvl 2 )
        DE DECd,
        LDA(DE),
        0x7f ANDi, ( remove IMMEDIATE flag )
        C CPr,                                        ( cont. )