Difference between revisions of "VAX"
GerdIsenberg (talk | contribs) (Created page with "'''Home * Hardware * VAX''' FILE:SPEC-1 VAX 05.jpg|border|right|thumb| | SPEC-1 VAX <ref>The SPEC-1 VAX, the [https://en.wikipedia.org/wiki/VAX-11#VAX-11...") |
GerdIsenberg (talk | contribs) |
||
| Line 1: | Line 1: | ||
'''[[Main Page|Home]] * [[Hardware]] * VAX''' | '''[[Main Page|Home]] * [[Hardware]] * VAX''' | ||
| − | [[FILE:SPEC-1 VAX 05.jpg|border|right|thumb| | + | [[FILE:SPEC-1 VAX 05.jpg|border|right|thumb| SPEC-1 VAX <ref>The SPEC-1 VAX, the [https://en.wikipedia.org/wiki/VAX-11#VAX-11/780 VAX 11/780] that was used as the benchmark for the speed of each of DEC's VAXes. Now on display at the Department of Computer Science & Engineering, [https://en.wikipedia.org/wiki/University_of_Washington University of Washington], [https://en.wikipedia.org/wiki/Seattle Seattle], [https://en.wikipedia.org/wiki/Washington_(state) Washington], Photo by [https://commons.wikimedia.org/wiki/User:Jmabel Joe Mabel], August 03, 2009, [https://en.wikipedia.org/wiki/VAX VAX from Wikipedia], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]] |
| − | |||
'''VAX''', (Virtual Address Extension)<br/> | '''VAX''', (Virtual Address Extension)<br/> | ||
| Line 20: | Line 19: | ||
<span id="MicroVAX"></span> | <span id="MicroVAX"></span> | ||
=MicroVAX= | =MicroVAX= | ||
| + | [[FILE:DEC MicroVAX CPU die.JPG|border|right|thumb| DEC MicroVAX CPU die <ref>Die shot of DEC [https://en.wikipedia.org/wiki/MicroVAX_78032 MicroVAX 78032-GD] microprocessor from [https://en.wikipedia.org/wiki/VAXstation#VAXstation_2000 VAXstation2000] with chip number DC333R and part number 21-20887-05 on heatsink. Image by [https://commons.wikimedia.org/wiki/User:Birdman86 Pauli Rautakorpi], August 23, 2013, </ref> ]] | ||
The '''MicroVAX''' was a family of low-end minicomputers implemented the VAX instruction set architecture, first introduced in 1984. | The '''MicroVAX''' was a family of low-end minicomputers implemented the VAX instruction set architecture, first introduced in 1984. | ||
| Line 46: | Line 46: | ||
<references /> | <references /> | ||
'''[[Hardware|Up one Level]]''' | '''[[Hardware|Up one Level]]''' | ||
| + | [[Category:Die]] | ||
Revision as of 20:39, 27 December 2019
VAX, (Virtual Address Extension)
an instruction set architecture, developed by Digital Equipment Corporation (DEC) in the mid-1970s, to extend the PDP-11 architecture to a 32-bit orthogonal instruction set while adding a complete virtual memory system to the simple paging and memory protection of the PDP-11.
The first computer to use a VAX CPU was the VAX-11/780, which DEC referred to as a Superminicomputer [2].
DEC's VAX strategy was formulated by Gordon Bell [3].
Contents
Registers
VAX has 16 32-bit registers, R0-R15. R0-R11 general purpose, R12/AP the argument pointer, R13/FP the frame pointer, R14/SP the stack pointer, and R15/PC the program counter or instruction pointer.
Instructions
The general form of a VAX instruction ...
opcode [ operand ] [ operand ] ...
... has each component being one byte, the opcode a value in the range 0 - 255, and each operand consisting of two nibbles, the upper 4 bits specifying an addressing mode, and the lower 4 bits (usually) a register number (R0 - R15).
MicroVAX
The MicroVAX was a family of low-end minicomputers implemented the VAX instruction set architecture, first introduced in 1984.
Chess Programs
See also
External Links
- VAX from Wikipedia
- List of VAX computers from Wikipedia
- NVAX from Wikipedia
- VAX-11 from Wikipedia
- VAX 8000 from Wikipedia
- VAX 7000/10000 from Wikipedia
- VAXstation from Wikipedia
- MicroVAX from Wikipedia
- MicroVAX 78032 from Wikipedia
- VAX Macro from Wikipedia
- OpenVMS from Wikipedia
References
- ↑ The SPEC-1 VAX, the VAX 11/780 that was used as the benchmark for the speed of each of DEC's VAXes. Now on display at the Department of Computer Science & Engineering, University of Washington, Seattle, Washington, Photo by Joe Mabel, August 03, 2009, VAX from Wikipedia, Wikimedia Commons
- ↑ Digital Equipment Corporation - VAX from Wikipedia
- ↑ Beyond VAX: A Conversation with Gordon Bell. Computerworld, September 2, 1987, pdf from The Computer History Museum
- ↑ Die shot of DEC MicroVAX 78032-GD microprocessor from VAXstation2000 with chip number DC333R and part number 21-20887-05 on heatsink. Image by Pauli Rautakorpi, August 23, 2013,
