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SYNTAX      [<LABEL>] FORT <constant>

OPERANDS    Constant = 0 or 1

EXECUTION   (PC) + 1 . PC
            Constant . format (FO) status bit
            Affects FO.

DESCRIPTION The format (FO) status bit is loaded by the instruction with
            the LSB specified in the instruction. The FO bit is used to
            control the formatting of the transmit and receive shift
            registers of the serial port. If FO = 0, the registers are
            configured to receive/transmit 16-bit words. If FO = 1, the
            registers are configured to receive/transmit 8-bit bytes. FO
            is set to zero on a reset.

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  0  0  1  1  1|FO |
            +-----------------------------------------------+

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   |   -   |   -   |
            |-------+-------+-------+--------+-------+-------|
     'C25   |   1   |   1   |  1+p  |  1+p   |   1   |   1   |
            |------------------------------------------------|
            |    Cycle Timings for a Repeat Instruction      |
            |------------------------------------------------|
      '20   |   n   |   n   |  n+p  |  n+p   |   -   |   -   |
            |-------+-------+-------+--------+-------+-------|
     'C25   |   n   |   n   |  n+p  |  n+p   |   n   |   n   |
            +------------------------------------------------+



EXAMPLE     FORT  1     The FO status bit is loaded with 1, making the bit
                        length of the serial port 8 bits.
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