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44839: Read The Schedule Field
Used by the routine at MatchWordAgainstEarlierClause.
Sets the copy length from the script position, using two bytes when that position is empty.
44839 CALL SetCopyLengthTen Call SetCopyLengthTen to set the copy length to 10.
44842 LD A,(IY+2) Test whether the word at IY+2-3 is zero.
44845 OR (IY+3)
44848 LD DE,2 Take a length of 2 bytes.
Set copy length 2.
44851 CALL Z,SetCopyLengthTwo Call SetCopyLengthTwo to set the copy length to 2 if the link word is zero.
44854 EXX Switch back to the values saved for the caller.
44855 RET Return.
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