Top: Industrial Version of a DEC PDP-11 CPU, below a very widely used PDP-11/70 CPU.

Top: Industrial Version of a DEC PDP-11 CPU, below a very widely used PDP-11/70 CPU.

A PDP-11/70 Console. These display and switch consoles were the hallmark of the PDP-11 computers in the 70ties. Picture Henk Gooijen

These display and switch consoles were the hallmark of the computers in the Picture Henk Gooijen

PDP-11/70. The PDP-11/70 represented the high end of PDP-11 architecture with the capacity for supporting the speed, addressing range and bandwidth required in large systems applications. It was the first PDP-11 to use cache memory

1975 - The represented the high end of architecture with the capacity for supporting the speed, addressing range and bandwidth required in large systems applications. It was the first to use cache memory.

UNIX inventors Ken Thompson and Dennis Ritchie at Bell Labs before a DEC PDP-11 minicomputer

Ken Thompson and Dennis Ritchie Ritchie (standing) and Thompson work on Unix at a at Bell Labs.

The midrange PDP-11/34 was DIGITAL's most successful PDP-11 in terms of unit volume. The 11/34 featured a CPU so compact that the entire CPU logic was contained on two circuit boards. This provided greater flexiblity during later system expansion by making additional chassis space available

The midrange PDP-11/34 was DIGITAL's most successful PDP-11 in terms of unit volume. The 11/34 featured a CPU so compact that the entire CPU logic was contained on two circuit boards. This provided greater flexiblity during later system expansion by making additional chassis space available

Re-animating the PDP-11/70

(Used this as the template to do my inkscape panel)

PDP 11/70 Emulator

PDP 11/70 Emulator

Dennis Ritchie stands over Ken Thompson as he works on the PDP-11 (1972). They authored a computer language you may have heard of. It's called "C".

Dennis Ritchie: The shoulders Steve Jobs stood on

Dennis Ritchie (standing) and Ken Thompson, inventors of the UNIX operating system at Bell labs, work at a in the early

PDP-11/05 and 11/10. The central processors for the PDP-11/05 and 11/10 were identical. The 11/05 was offered for the Original Equipment Manufacturer, while the 11/10 was designed for the end user. Both machines offered features not available on the earlier PDP-11/20, such as 4-level priority interrupt and multiple accumulators

PDP-11/05 and 11/10. The central processors for the PDP-11/05 and 11/10 were identical. The 11/05 was offered for the Original Equipment Manufacturer, while the 11/10 was designed for the end user. Both machines offered features not available on the earlier PDP-11/20, such as 4-level priority interrupt and multiple accumulators

PDP-11... Where UNIX was born

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