RAM

INST

DATA

0000:

1000:

0001:

1001:

0010:

1010:

0011:

1011:

0100:

1100:

0101:

1101:

0110:

1110:

0111:

1111:

ICTR:

IREG:

ACC:

Reset

Instruction Set
  <x> is a 4-bit memory address
  0000        -- NOP (Do nothing)
  0001 <x> -- LOAD value at <x> to ACC
  0010 <x> -- STORE value in ACC at <x>
  0011 <x> -- ADD value at <x> to ACC
  0100 <x> -- SUB value at <x> from ACC
  0101 <x> -- MUL ACC by value at <x>
  0110 <x> -- DIV ACC by value at <x>
  1000 <x> -- PRINT <x> to Monitor
  1001 <x> -- INPUT keyboard to <x>