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Leon

Electrical & computer engineer who loves old computers

Athens Greece

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This user joined on 10/31/2018.

My Projects

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

Qubide with 512K ram leaves a small amount of free ram to QL so this is a version with more ram and an expansion connector

QUBIDE clone with 640K or 704K ram upgrade for QL

It is a 1MByte flash cartridge, it supports standard 8K and 16K carts.

Multi-Cart for 8-bit Atari computers

Having burned two ZX8301 chips in the last years was a motive to make a cpld based replacement for the QL ZX8301 ULA.

ZX8301 replacement for Sinclair QL

A friend asked me to see why a video circuit for the pal version apple IIc didn't work, I designed a new video adapter for him.

Video adapter for PAL Apple IIc

This is my final ula replacement board for the ZX8301 ula of Sinclair QL. This one offers no optimizations but is compatible with SGC/GC.

Lion ULA - ZX8301 ULA for Sinclair QL

Projects I Contribute To

A Windows Emulator for the Lion FPGA CPU/Computer.

LionWin

My Lists

Retro Computer Projects

Projects related to retro computers, cards, accelerators, upgrades, cartridges, emulators, clones

Curated by Leon

Projects I Like & Follow

The 2018 Hackaday Prize

The Automatic Infinite 3D Printer (i3D) gives anyone the power of a factory.

Automatic Infinite 3D Printer

swaleh-owais Swaleh Owais

Follow for the 'Hacklet' and latest news about hackaday.io

Hackaday.io Project

I set out to build a working 13"-27" CRT Arcade XY Vector Monitor. UPDATE!!! 5" and 9" monitors too.

BUILD an ARCADE XY VECTOR MONITOR

The 2017 Hackaday Prize

A computer invented, designed and built from scratch. Custom CPU on FPGA.

A2Z Computer

A mc68k-based computer motherboard, some expansion cards, and a very basic multitasking OS, all built from scratch.

Motorola 68000 computer

An optimized "re-mix" of Adafruit's GFX library (and LCD drivers) for Arduino (AVR).

PDQ_GFX optimzed AVR LCD graphics

A Single-board Modular Logic Noise Synth Monster

Logic Noise: Klangorium

elliot-williams Elliot Williams

Porting the classic Doom engine to an FPGA-based system

FPGA Doom

matt-stock Matt Stock

Game engine using a virtual machine with a simulator and a web compiler

Esp little game engine

The 2017 Hackaday Prize

Low cost IDE/PATA disk emulator using a RPi Zero that also brings wireless networking to vintage computers.

NetPi-IDE

Hackaday Prize 2019

University digital Logic Learning Xtensible board release 3 with SDRAM

ULX3S powerful ECP5 board for open source FPGA

radionaorg radiona.org

Recreation of the 'Fastest computer in the Universe' that runs FORTH.

Recreating the Jupiter Ace

cees-meijer Cees Meijer

I am building a computer featuring a 16-bit RISC CPU made of discrete transistors for learning, fun and art. It will be pretty large.

The Spikeputor

Writing on a whiteboard with stepper motors

Scribing Robot

Retrochallenge 2016/10 entry and winner: try to build a TI-99/4A clone using a TMS99105 CPU and an FPGA. In a month...

RC2016/99: TI-99/4A clone using TMS99105 CPU

erik-piehl Erik Piehl

A custom 32-bit CPU core with GCC toolchain

Bexkat1 CPU

matt-stock Matt Stock

Retro challenge 2017/04 project to create a TMS9900 compatible CPU core. Again in a month... Failure could be an option...

TMS9900 compatible CPU core in VHDL

erik-piehl Erik Piehl

The memory systems of Altera Cyclone5 FPGAs have various features and limitations. I will not talk about the HPS here, only the FPGA.

Memory on Cyclone5 FPGA

bruce-land Bruce Land

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Bits

Dusan Petrovic wrote 03/25/2019 at 12:30

Hello Leon! Thank you for following my #Homebrew CPU list.

Are you sure? yes | no