Ken Shirriff's blog

In 1970, MOS memory chips were just becoming popular, but were still very expensive. Intel had released their first product the previous yea...

The 8-bit Z80 microprocessor is famed for use in many early personal computers such the Osborne 1, TRS-80, and Sinclair ZX Spectrum. The Z80...

This article is now available in Japanese: 紙と鉛筆でビットコインをマイニング：1日に0.67ハッシュ and Russian: Майним Bitcoin с помощью бумаги и ручки . I decided...

If you look closely at the datasheet for a Z-80 chip, you'll notice the data pins are in a random-looking order. The address pins (A) ar...

Update: It turns out my 7805 isn't counterfeit. eclectro did an in-depth search ( details on reddit ) and found an old 7805 datasheet...