P/N 5640987
Type
Model F 3104/3178 Terminal Keyboard
Nickname
Blue Switch
OEM
IBM
Switches
IBM capacitive buckling springs
Earliest Appearance
1983 Q1
Original Keycaps
PBT with dye-sublimated legends
Casing Colour
Beige/Off White
Branding
IBM silver square badge
Protocol
IBM 3178-specific
Connection
Cable
Cable
Grey straight fixed DA-15
Key Count
87
Data Last Updated
2021-04-08
More about this type of keyboard...
The so-called "blue switch" Model F terminal keyboards were a series of five distinct keyboards for originally the IBM 3178 Display Station in Q1 1983 and later for the IBM 3104 Display Terminal. Characterised by their blue switch used for toggling the terminal's display between uppercase + lowercase or uppercase-only display, these Model Fs featured a heavily modified XT-like layout with two or three function banks.