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Homebrew CPU

Projects that help you to build your Homebrew CPU

curated by dusan-petrovic

Dusan Petrovic and

Lutetium

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A Retrobrew TTL CPU - Classic yet Baroque

ONAN 1111

nicolas-reimen Nicolas REIMEN

256 switches and few shift registers to implement a working 16 or 32-bit integer arithmetic calculator (+, -, *, /, isqrt, BCD / bin conv..)

Bit-serial CPU based on crossbar switch

using the lm324n quad 1mhz op amp to build simple logic; which are then used to create a simple ALU

1-Bit ALU useing Open Loop Op-Amps

dave-collins Dave Collins

Creating a complete working retro 16-bit computer from scratch in the style of the C64, CPC 464 and alike using an FPGA

The Moncky project

32 bit RISC-V homemade CPU out of discrete components

Pineapple ONE

filipszkandera filip.szkandera

A microcode compiler developed to fit into FPGA toolchain and validated to develop CDP1805-like CPU and text-based video controller

Microcoding for FPGAs

8 Bit CPU in 7400 with full Verilog simulator and toolchain

SPAM-1 - 8 Bit CPU

john-lonergan John Lonergan

A 16-bit TTL CPU and stack machine built out of 7400-series chips.

TTL Operation Module (TOM-1)

tim-ryan Tim Ryan

This projects tracks my efforts to develop discrete LED-Transistor logic building blocks and designing a CPU from them.

LCPU - A CPU in LED-Transistor-Logic (LTL)

A TTL CPU I built a long time ago when I bought a huge stock of NOS TTL chips on ebay

4 Bit TTL CPU

16-instruction, 12-bit Asynchronous CPU

CPU-001

Homebuilt 8-bit CPU and GPU for fun entertainment system.

j8ger

This clock has no microcontroller, but a TTL CPU built on 1 square inch

Clock driven by small homebrew CPU

A 16-bit (and a 32bit) FPGA CPU I call Lion CPU and a computer, the Lion computer. Everything built from scratch.

Lion FPGA CPU/Computer

A 32 Bit Variable Length Instruction Set Core and Transputer Like Comms Network

Trinity Core and Net