A# - CPU in Logicsim.

Central Processing Unit created in logicsim, using only basic logic gates and integrated circuits (Created by me).

This CPU is extremally optimised for using a low quantity of clocks circles per operation, Mostly using 1 clock per operation.

Making possible running interessing programs at 4.1 KMz.

Inner view.

Circuits and CPU created in 2015. (I just passed it to github for public domain).

Documentation CPU instructions

All instructions are created by myself. Here is the list (not complete).

Operation	Binary	HEX
INIT AX	00000000	00
IN AX	00110001	31
OUT AX	00110010	32
MOV AX, BX	00000001	01
MOV AX, CX	00000010	02
MOV BX, AX	00000101	05
MOV CX, AX	00000110	06
MOV AX, {RAM}	00000100	04
ADD AX, BX	00001101	0D
ADD AX, CX	00001110	0E
SUB AX, BX	00010001	11
SUB AX, CX	00010010	12
JNO	01001010	4A
PUSH AX	10000000	80
PUSH BX	1000001	81
PUSH CX	10000010	82
POP AX	10010000	90
POP BX	10010001	91
POP CX	10010010	92
OR AX,BX	00011001	19
OR AX,CX	00011110	1E
NOT AX	00010100	14
INC AX	00001100	0C
DEC AX	00010000	10

Is possible to make CALLS and MOV {RAM}, AX, Conditional or incoditional JUMPS etc...

But i dont remember instructions anymore (I will analise later.)

Sinus Wave Code Demonstration

Hexadecimal program loaded.

00 00 00 05 01 00 04 ff
00 00 00 05 11 00 04 ff
05 11 00 04 ff 05 21 00
04 ff 05 21 00 04 ff 05
41 00 04 ff 05 41 00 04
ff 05 21 00 04 ff 00 05
21 00 04 ff 05 11 00 04
ff 05 11 00 04 ff 00 00
00 27 08

Video demonstration Watch the video

Interessing ideas for new CPUs

I could implement alot of things to make this have a even better clock performance.

1. Having a SPECIAL register thats defines block of memory for actuation, decreasing the amount of information for JMP instruction.
2. Duplicate BUS, to enter two instructions at a time with two loaded ROM units and create a unit that defines whether two instructions can be executed simultaneously, like (PUSH CX, INC AX) or even (MOV AX, CX and MOV AX, BX) having 2x better performance and 2 intructions per 1 clock.