The pseudoinstruction BSS N (block started by symbol) is sometimes employed to reserve N memory words for a group of operands. For example, the line of code 

A, BSS 10 

informs the assembler. that a block of 10 (decimal) locations is to be left free, starting from location A. This is similar to the Fortran statement DIMENSION A(10). Modify the flowchart of Fig. 6-1 to process this pseudoinstruction.

Fig. 6-1

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First pass LC+0 Scan next line of code Label yes no Store symbol in address- symbol table together with value of LC Increment LC Set LC yes ORG no END no yes Go to second pass