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1C1F: THE 'COMMAND CLASS +01' ROUTINE
Used by the routines at READ_3 and INPUT.
The address of this routine is derived from an offset found in the command class table.
Command class +01 is concerned with the identification of the variable in a LET, READ or INPUT statement.
Input
Output
CLASS_01 1C1F CALL LOOK_VARS Look in the variables area to determine whether or not the variable has been used already.
This routine continues into VAR_A_1.
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