Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Germanium transistors: logic circuits in the IBM 1401 computer
›
How did computers implement logic gates in the 1950s? Computers were moving into the transistor age, but transistors were expensive so cir...
6 comments:
Strange chip: Teardown of a vintage IBM token ring controller
›
IBM used some unusual techniques in its integrated circuits, and one of the most visible is packaging them in square metal cans. I've ...
7 comments:
Booting the IBM 1401: How a 1959 punch-card computer loads a program
›
How do you boot a computer from punch cards when the computer has no operating system and no ROM? To make things worse, this computer req...
19 comments:
‹
›
Home
View web version