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Erik Piehl

Always seeking to learn or achieve something new, I like to tinker both with software (C/C++/ASM) and hardware (MCUs, FPGAs).

Finland
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erik-piehl
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This user joined on 08/11/2016.

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Retrochallenge 2016/10 entry and winner: try to build a TI-99/4A clone using a TMS99105 CPU and an FPGA. In a month...
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RC2016/99: TI-99/4A clone using TMS99105 CPU

erik-piehlErik Piehl

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

erik-piehlErik Piehl

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64 megabytes RAM expansion for the TI-99/4A using the Pipistrello FPGA board and a buffer board.
Project Owner Contributor

TI-99/4A memory extension with Pipistrello FPGA

erik-piehlErik Piehl

Things I've Built

TI-99/4A GROM hardware emulator

Here an NXP LPC1114 Cortex M0 MCU emulates up to 5 GROM memories. The SD Processor board is also wired up, but just to provide bank switching for the cartridge ROM to support TI Extended Basic.

ZX Spectrum FPGA implementation

A simple Sinclair ZX Spectrum design running on a Nexus 2 1200 board. Not cycle exact, but still fun!

ZX81 keyboard interface

This is a PS2 keyboard interface for the ZX81. Uses an ATMega88 micro controller and Altera EPM3064 CPLD.

TMS9995 and FPGA breadboard

An implementation of a TMS9995 system with memory paging and SD card support implemented by a Spartan 6 LX9 FPGA.

SD Processor board

A board design with CPLD and NXP ARM micro controller, supporting USB and SD card interfaces as well as a 5V tolerant bus interface for retro computers.

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Connect your unsecured wireless stuff to the internet in a secure and anonymous way
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Raspberry Tor Router

thomasThomas

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

lutetiumLutetium

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My attempt at making an FPGA experimenters board in a popular form factor :)
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'Flea Ohm' FPGA Project

valentin-angelovskiValentin Angelovski

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Turn your Raspberry Pi 3 into an Eddystone URL beacon
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Raspberry Pi 3 as an Eddystone URL beacon

yamir-encarnacionYamir Encarnacion

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MC68030 based single board computer
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T030

tobias-rathjeTobias Rathje

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An open-source minimalist 68020 based single board computer
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rhombus

jason-westerveltJason Westervelt

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