HackadayFeb 22

How the Intel 8087 FPU Knows Which Instructions to Execute

https://fed.brid.gy/r/https://hackaday.com/2026/02/21/how-the-intel-8087-fpu-knows-which-instructions-to-execute/

13Feb 22
How the Intel 8087 FPU Knows Which Instructions to Execute https://hackaday.com/2026/02/21/how-the-intel-8087-fpu-knows-which-instructions-to-execute/
#Retrocomputing #ReverseEngineering #Intel8087
How The Intel 8087 FPU Knows Which Instructions To Execute

An interesting detail about the Intel 8087 floating point processor (FPU) is that it’s a co-processor that shares a bus with the 8086 or 8088 CPU and system memory, which means that somehow b…

Hackaday
Hacker NewsJan 19

Conditions in the Intel 8087 floating-point chip's microcode

https://www.righto.com/2025/12/8087-microcode-conditions.html

#HackerNews #Intel8087 #FloatingPoint #Microcode #Technology #History #ComputerArchitecture

Conditions in the Intel 8087 floating-point chip's microcode

In the 1980s, if you wanted your computer to do floating-point calculations faster, you could buy the Intel 8087 floating-point coprocessor ...

Eric VitielloMay 19, 2020

Extracting ROM constants from the 8087 math coprocessor's die

http://www.righto.com/2020/05/extracting-rom-constants-from-8087-math.html

#Intel8087 #FloatingPointArithmetic #ComputerHistory #Math #Intel

Extracting ROM constants from the 8087 math coprocessor's die

Intel introduced the 8087 chip in 1980 to improve floating-point performance on the 8086 and 8088 processors, and it was used with the ori...