Ken Shirriff

righto.com

18 October 2026 19:05

Have you ever thought about how your computer adds and subtracts? It takes a lot of hardware to handle floating-point numbers like 12.34. I opened up Intel's 8087 math coprocessor chip from 1980 to see how it works...

Nanoraptor

nanoraptor.danamania.com

13 September 2026 09:05

I will probably be as repetitive about this like I am with backups, bodies, and batteries. Australians, plan to be where you want on July 22 2028 to see the total solar eclipse, you ferals.

Seeed Studio

seeedstudio.com

26 August 2026 14:57

At 8 cm, Bluetooth Channel Sounding reported 7.66 cm. At 1 m, it reported about 4 m 📏 Our engineer Brandy tested BLE 6.0 ranging with two XIAO nRF54LM20A boards in an ordinary room. Great up close, hard to trust beyond it.  Full write-up 👉 https://tinyurl.com/bdzm29hr

Nanoraptor

nanoraptor.danamania.com

14 July 2026 09:26

It’s time to simplify shift patterns.

Ken Shirriff

righto.com

14 February 2026 18:26

In 1980, Intel released the 8087 floating-point chip, making math much faster. I'm reverse-engineering this chip, 46 years later. Most of its instructions are implemented in microcode, but some are implemented in hardware. Let's look at the circuitry that decodes instructions and decides what to do.