EDN

Building a 4-Bit Computer from the Ground Up

What we are going to do is design a simple 4-bit computer at the primitive logic gate and flip-flop level and then implement it in the technology of our choice I’ve often wondered what would happen if ...
Hackaday

1MHz, 2 Boards, 4 Bits And A Homebrew CPU

[Agp.cooper] saw a vintage 4Kx4 bit RAM chip and decided that it needed a CPU design to match. The TTL design fits on two boards and has a functional front panel. This custom CPU project has a few ...
Hackaday

MikroLeo, A 4-Bit Retro Learning Platform

MikroLeo is a discrete TTL logic-based microcomputer intended for educational purposes created by [Edson Junior Acordi], an Electronics Professor at the Brazilian Federal Institute of Paraná, Brazil.
EDN

Building a 4-Bit Computer: Instruction Trade-offs

If you are limiting yourself to only 16 instructions, which ones should you chose, and how do you manage without the ones that fall by the wayside? In my previous column on our project to build a ...
ExtremeTech

First Mover: Intel's 4-bit 4004 CPU Turns 50

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Computerworld

CPUs rev new engines

In 1971, Intel Corp. introduced its first microprocessor chip, the 4004. The 4-bit processor chugged along at a mere 104 KHz. In the 35 years since then, processor clock speeds—and performance—have ...