BEXT

Instruction Name	Branch on External
Mnemonics	BEXT
CP1610 Clock Cycles	7 or 9
Interruptible	Yes
Opcode Range	$0210-$21F, $0230-$23F

The Branch on External opcode (BEXT) is a two-decle opcode that is a part of the Branch family of opcodes. This instruction causes the CP1610 to branch if the external pins EBCA0-EBCA3 match the specified value. If this condition is true, the CP1610 branches to the address specified by the following parameters.

   Format - Decle #1    Format - Word #2 (All 16 bits are significant)
   0000:0010:00d1:cccc  aaaa:aaaa:aaaa:aaaa

   where:

       d      indicates the direction of the branch
              such that:
                  d == 0    indicates to branch in the forward direction
                  d == 1    indicates to branch in the reverse direction

       cccc   The value to assert on external pins EBCA0-EBCA3.  
              The input EBCI determines whether the branch gets taken.

       aaaaaaaaaaaaaaaa    indicates the amount of offset

See the Branch opcode family documentation for more information.