4 bit Redstone Computer

4-bit Redstone Computer
Functions

-0101(A=10)-Addition
-1101(A=11)-Subtraction
-1011(A=13)-Write Memory
-0111(A=14)-Read Memory
-1111(A=15)-Clear Memory

The computer has 8 lines for inputting data to be processed, and has an additional 3 lines for updating RAM, inputting commands, and clearing registers.
The programming of the instruction lines is simple, this is the only input device and to use it, first the function with which the program is going to work is coded and then each instruction to be carried out is coded, if the function with which it is going to work work the program is not entered, the computer does not work.