26. Simplified Conditional Jump Instructions (not x86!)

There are six conditional jump instructions:

    JA  - jump if greater than (above)
    JAE - jump if greater than or equal
    JB  - jump if less than (below)
    JBE - jump if less than or equal
    JE  - jump if equality
    JNE - jump if inequality

You would normally execute JE or similar instruction immediately after a CMP instruction, since it sets the less than and equality flags in the CPU for conditional jump instructions to look at.

Conditional jump instruction mechanics are:
1. Test some condition, and then jump, but only if the condition was true.
2. Fall through to the next instruction if the condition was false.

Conditional jumps test the results of the preceeding CMP instruction. For example,

            cmp     bx, 0           ; Is BX = 0?
            je      is_zero         ; Jump if so
            ...
    is_zero:

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