User:I am islptng/SingleOperandAssembly

Instructions

The RISC has 16 instructions, each of them has exactly 1 operand.

The computer has a register to store the result of calculations.

Hex	Keyword	Meaning
0	imd x	reg = x
1	jmp x	pc = x
2	jnz x	if(reg != 0) pc = x
3	jlz x	if(reg < 0) pc = x
4	get x	reg = ram[x]
5	put x	ram[x] = reg
6	rget x	reg = ram[ram[x]]
7	rput x	ram[ram[x]] = reg
8	add x	reg += ram[x]
9	sub x	reg -= ram[x]
A	and x	reg &= ram[x]
B	or x	reg |= ram[x]
C	xor x	reg ^= ram[x]
D	rol x	(reg >> (8 - ram[x]))
E	shr x	reg >>= ram[x] (logic)
F	ashr x	reg >>= ram[x] (arithmetic)

Virtual machine and assembler

Try it online! Use a single line of exclamation mark to separate the assembly code and input.

Example for a cat program Input:

w:get 65535 put 65535 jnz w
!
3
0

Assembly code:

w:get 65535 put 65535 jnz w

Input for the machine:

[3,0]

Assembled to machine code:

0000 4 ffff
0001 5 ffff
0002 2 0000

Output result:

3
0