The Z-80's 16-bit increment/decrement circuit reverse engineered

›
The 8-bit Z-80 processor was very popular in the late 1970s and early 1980s, powering many personal computers such as the Osborne 1, TRS-80,...
13 comments:

The Z-80 has a 4-bit ALU. Here's how it works.

›
The 8-bit Z-80 processor is famed for use in many early personal computers such the Osborne 1, TRS-80, and Sinclair ZX Spectrum, and it is s...
23 comments:

Intel x86 documentation has more pages than the 6502 has transistors

›
Microprocessors have become immensely more complex thanks to Moore's Law, but one thing that has been lost is the ability to fully under...
6 comments:

Reverse-engineering the Z-80: the silicon for two interesting gates explained

›
I've been reverse-engineering the Z-80 processor, using images from the Visual 6502 team. One interesting thing about the Z-80's s...
4 comments:

9 Hacker News comments I'm tired of seeing

›
As a long-time reader of Hacker News, I keep seeing some comments they don't really contribute to the conversation. Since the discussio...
43 comments:

Reverse-engineering the 8085's decimal adjust circuitry

›
In this post I reverse-engineer and describe the simple decimal adjust circuit in the 8085 microprocessor. Binary-coded decimal arithmetic ...
2 comments:

Reverse-engineering and simulating Sinclair's amazing 1974 calculator with half the ROM of the HP-35

›
I've reverse-engineered the Sinclair Scientific calculator. The remarkable thing about this calculator is they took a simple 4-function ...
7 comments: