Ok so this is part of what I have: 
 byte 1               byte 2 (optional)
 bits      [ 7 6 5 4 3 2 1 0 ]  [ 7 6 5 4 3 2 1 0 ]
 opcode      - - -             
 mod               -           
 operand1            - - - -
 operand2                         - - - - - - - -

[download]
And instructions: 
 opcode | instruction | operands (mod 0) | operands (mod 1)
 -------+-------------+------------------+-----------------
 0x00   | jmp         | r1               | r2:r1
 0x01   | movr        | r1, r2           | rx,   imm 
 0x02   | movm        | r1, [ds:r2]      | [ds:r1], r2
 0x03   | add         | r1, r2           | r1,   imm

 flags
 
 cmp r1, r2 instruction results in:
    r1 == r2 => fl = 0
    r1 < r2  => fl = 0xff
    r1 > r2  => fl = 1
 
    jmpe r1
    => if (fl == 0) jmp r1
    else nop

[download]
I am then given: 
 0x00 0x00 0x00 0x01 0x03 0x02 0x03 0x02 0x03 0x02

[download]
But pretty much like you said, I am in need of simulating a processor with given instructions.

In reply to Re^2: Parsing through instructions by DaveMonk
in thread Parsing through instructions by DaveMonk

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