16-Bit Instruction Set for a Minecraft Computer

16-Bit Instruction Set for a Minecraft Computer
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The instructions are formatted like this: x xxxx xx xxx xxx xxx.

First bit: Defines if the instruction is an immediate or compute instructions. If the bit is on
the first 8 bits will become immediates and the remaining 7 (without the first bit) aren't used.

If the instruction is a compute one, each section will do this:
First bit = I already mentioned that.
Next four bits = Opcode
0000 = NoOP
0001 = Add
0010 = Sub (A-B)
0011 = And
0100 = Or
0101 = Not (A)
0110 = Xor
0111 = Nand
1000 = Nor
1001 = Xnor
1010 = Not (B)

Next 2 bits = Flags
First bit (out of this set) = If zero
Second bit (out of this set) = If overflow

Next 3 bits = A source register

Next 3 bits = Destination register

Next 3 bits = B Source register

Note: The ALU has 2, 8 bit operands.