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SYNTAX      [<LABEL>] RET

OPERANDS    None

EXECUTION   (TOS) . PC
            Pop stack one level.

DESCRIPTION The contents of the top stack register are copied into the
            program counter. The stack is then popped one level. RET is
            used with CALA and CALL for subroutines.

WORDS       1

ENCODING    15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
            +-----------------------------------------------+
            |1  1  0  0  1  1  1  0  0  0  1  0  0  1  1  0 |
            +-----------------------------------------------+

CYCLES

            +-----------------------------------------------+
            |     Cycle Timings for a Single Instruction    |
            |-----------------------------------------------|
            | PI/DI | PI/DE | PE/DI | PE/DE | PR/DI | PR/DE |
            |-------+-------+-------+-------+-------+-------|
       '20  |   1   |   1   |  1+p  |  1+p  |   1   |   1   |
            |-----------------------------------------------|
      'C25  |            Destination on-chip RAM            |
            |-----------------------------------------------|
            |   2   |   2   |  2+p  |  2+p  |   2   |   2   |
            |-----------------------------------------------|
            |            Destination on-chip ROM            |
            |-----------------------------------------------|
            |   3   |   3   |  3+p  |  3+p  |   3   |   3   |
            |-----------------------------------------------|
            |          Destination external memory          |
            |-----------------------------------------------|
            |  3+p  |  3+p  | 3+2p  |  3+2p |  3+p  |  3+p  |
            |-----------------------------------------------|
            |     Cycle Timings for a Repeat Instruction    |
            |-----------------------------------------------|
       '20  |         not repeatable        |   -   |   -   |
            |-----------------------------------------------|
      'C25  |                not repeatable                 |
            +-----------------------------------------------+



EXAMPLE     RET


                     BEFORE             AFTER

                  PC    >96         PC    >37

               STACK    >37      STACK    >45
                (20)    >45       (20)    >75
                        >75               >21
                        >21               >21

                STACK   >37       STACK   >45
                (C25)   >45       (C25)   >75
                        >75               >21
                        >21               >3F
                        >3F               >45
                        >45               >6E
                        >6E               >6E
                        >6E               >6E