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Andreas Gruber-Kersting

I am a retired systems analyst into electronics as a hobbyist.

Berlin, Germany

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This user joined on 05/08/2020.

Projects I Like & Follow

Hackaday Prize 2019

Homemade 8MHz Z80 SBC, 128kB banked RAM, RTC, SD (HD emulation), Basic and Forth interpreter, CP/M 2.2 and 3, UCSD Pascal, Fuzix and more...

Z80-MBC2: a 4 ICs homebrew Z80 computer

The 2017 Hackaday Prize

No iron, no cry! Build a mini 4MHz Z80 64kB RAM system with Basic and Forth interpreters, CP/M 2.2, QP/M 2.71, Assembler and C toolchains

A 4$, 4ICs, Z80 homemade computer on breadboard

Hackaday Prize 2019

A microprocessor built with TTL chips. In one square inch.

1 Square Inch TTL CPU

A simple Arduino mega SRAM expansion.

Arduino MEGA 2560 32Kb RAM shield

andrey-skvortsov Andrey Skvortsov

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 full-featured Forth-based RTOS for ARM Cortex-M

zeptoforth

travis-bemann Travis Bemann

I have been exploring one bit CPUs. For the right application they may be worth knowing.

One Bit CPUs

agpcooper agp.cooper

The 2016 Hackaday Prize

Scientific calculator with a brain built out of relays.

RISC Relay CPU

A sub-project of the ED-64 Computer to document the development of a 64-byte ferrite core memory module

Ferrite Core Memory Module

andrew-starr Andrew Starr

Generic prototyping of processors from 1970's and 1980's

Generic 8-bit Processors Prototype (G8PP)

An educational 16-bit CPU made from < 1024 transistors with lots of LEDs that anyone can build and learn from

The Blinking Computer

tony-robinson Tony Robinson

If we did not have ICs then this is what a 7400 NAND gate would look like!

A Discrete Transistor 7400 NAND GATE

agpcooper agp.cooper

A full ALU, capable of ADD, SUB and all logic functions, with only 12 transistors

ALU in DCTL technology

CPU-neutral, professionally designed, industrial strength. Design slave boards that work with any processor.

STEbus

Microchip PIC Programmer using GPIO connector, supporting dsPIC33E/PIC24E, dsPIC33F/PIC24H, PIC24FJ, PIC18FxxJxx and PIC32MX/Z families.

picberry

A more hackable eForth/z80

eForth/z80 modifications

ken-yap Ken Yap

68008 processor board renovation

STEbus 68008

The purpose of this project is to develop a family of logic circuits using discrete components.

Discrete Component Logic Family

harvey-sugar Harvey Sugar

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Ken Yap wrote 07/01/2020 at 07:35

Thanks for following #eForth/z80 modifications

Are you sure? yes | no

roelh wrote 05/20/2020 at 20:33

Hi Andreas, thanks for following the ALU in DCTL technology !

Are you sure? yes | no