VAX is a CISC instruction set architecture (ISA) and line of superminicomputers and workstations developed by the Digital Equipment Corporation (DEC) in the mid-1970s. The VAX-11/780, introduced October 25, 1977, was the first of a range of popular and influential computers implementing the VAX ISA. Over 100 models were introduced over the lifetime of the design, with the last members arriving in the early 1990s. The VAX was succeeded by the DEC Alpha, which included several features from VAX machines to make porting from the VAX easier.

VAX was designed as a successor to the 16-bit PDP-11, one of the most successful minicomputers in history with approximately 600,000 examples sold. The system was designed to offer backward compatibility with the PDP-11 while extending the memory to a full 32-bit implementation and adding demand paged virtual memory. The name VAX refers to its "Virtual Address eXtension" concept that allowed programs to make use of this newly available memory while still being compatible with unmodified PDP-11 code. The name "VAX-11", used on early models, was chosen to highlight this capability.

Later models in the series dropped the -11 branding as PDP-11 compatibility was no longer a major concern. The line expanded to both high-end machines like the VAX 9000 as well as to the workstation-scale systems like the VAXstation series. The VAX family ultimately contained ten distinct designs and over 100 individual models in total. All of these were compatible with each other and normally ran the well-regarded VAX/VMS operating system.

VAX has been perceived as the quintessential CISC ISA, with its very large number of assembly-language-programmer-friendly addressing modes and machine instructions, highly orthogonal architecture, and instructions for complex operations such as queue insertion or deletion, number formatting, and polynomial evaluation.

How To Love

How To Love

April 2, 2021

Play on spotify
Scared to Be Lonely

Scared to Be Lonely

December 4, 2020

Play on spotify
Riptide

Riptide

November 13, 2020

Play on spotify
Me & Ur Ghost

Me & Ur Ghost

June 19, 2020

Play on spotify
Trust You

Trust You

November 15, 2019

Play on spotify
Dandelion

Dandelion

August 16, 2019

Play on spotify
Bleeding Love

Bleeding Love

March 22, 2019

Play on spotify
What Are We Waiting For (feat. Ellise) [Acoustic Version]

What Are We Waiting For (feat. Ellise) [Acoustic Version]

March 15, 2019

Play on spotify
What Are We Waiting For (feat. Ellise)

What Are We Waiting For (feat. Ellise)

January 18, 2019

Play on spotify
Crime

Crime

August 17, 2018

Play on spotify
Bubble Gum (Lü Remix)

Bubble Gum (Lü Remix)

June 15, 2018

Play on spotify
Bubble Gum

Bubble Gum

May 4, 2018

Play on spotify
Endless (feat. Tove Styrke) [Acoustic Version]

Endless (feat. Tove Styrke) [Acoustic Version]

March 23, 2018

Play on spotify
Endless (feat. Tove Styrke)

Endless (feat. Tove Styrke)

February 16, 2018

Play on spotify
Fireproof (feat. Teddy Sky) [Jello Remix]

Fireproof (feat. Teddy Sky) [Jello Remix]

November 10, 2017

Play on spotify
Fireproof (feat. Teddy Sky) [DIMA Remix]

Fireproof (feat. Teddy Sky) [DIMA Remix]

September 15, 2017

Play on spotify
Fireproof (feat. Teddy Sky)

Fireproof (feat. Teddy Sky)

September 11, 2017

Play on spotify
6 In the Morning

6 In the Morning

May 26, 2017

Play on spotify
Read more

Like this too?

Madden

Madden

Rhys

Rhys

Sandro Cavazza

Sandro Cavazza

William Segerdahl

William Segerdahl

Klockrent!

Klockrent!

Albin Johnsén

Albin Johnsén

Alex Järvi

Alex Järvi

JUNG

JUNG

Rasmus Hagen

Rasmus Hagen

Paul Rey

Paul Rey

HON

HON

estraden

estraden

SJUR

SJUR

HEDEGAARD

HEDEGAARD

Joakim Lundell

Joakim Lundell

Peg Parnevik

Peg Parnevik

Niello

Niello

Ruben

Ruben

Davai

Davai

lovad

lovad

Would you like to write an article?