collapseos/blk/295

        ( DE contains prev offset )
        HL POP, ( <-- lvl 3, prev field )
        DEZ, IFNZ, ( offset not zero )
            ( get absolute addr from offset )
            ( carry cleared from "or e" )
            DE SBCHLd,
            EXDEHL, ( result in DE )
        THEN,
        HL POP, ( <-- lvl 2 )
    JRNZ, AGAIN, ( loop-B292, try to match again )
    ( Z set? end of dict, not found. "w" already on PSP TOS )
    PUSH0,
;CODE