Typo in MTMC spec

[KyleDickersonComposer]

The current spec has the jr's top nibble like so: 1000 0000 0000 rrrr

Found a test that has a different top nibble: 1001.

Jump Register spec

@Test
    void testJumpRegister() {
        MonTanaMiniComputer computer = new MonTanaMiniComputer();
        computer.setRegisterValue(T0, 50);
        short jumpIfZeroInst = (short) 0b1001_0000_0000_0000; // jr t0
        computer.execInstruction(jumpIfZeroInst);
        assertEquals(50, computer.getRegisterValue(PC));
    }

The test in question

[AphureA]

I have also encountered this typo in the spec.

The instruction for 1000 0000 0000 rrrr behaves as (and decodes to) lw t0. See below:

Spec states that the top nibble for JUMP REGISTER is 1001. The instruction for 1001 0000 0000 rrrr behaves as jr instruction, by my own testing. Howevever the ip register in the interface does not decode the command correctly. See below:

[jbanes]

Fixed by @paiv in PR. PR is merged. Closing.