Simple 4 Bit Computer
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Author: Aiden JOO

Project access type: Public


This is My 4 Bit computer with 6 instructions just like the SAP Computer. :)


00 NOP

1x LDA

2x ADD

3x SUB

ee OUT

ff END


This computer cannot calculate more than 2 numbers

This Example Program shows 5+7 and 4-5.

To Program, Set the Reset Bit to 1 and Program the ROM.

To Run the Program, Set the Reset Bit to 0.

The Numbers in the output are in Two's Complement so if the number is more than 7 

than the number will be negative because 7 is the biggest number in 4 bits.

Created: Jan 10, 2022

Updated: Aug 27, 2023


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Nice! I have seen the video about your computer, and I am using this as a tutorial for my 8 bit computer
Posted on Dec 29 2022 at 08:45PM UTC.