Virtual Address eXtension
E701312
Virtual Address eXtension is a 32-bit CISC computer architecture developed by Digital Equipment Corporation, widely used in minicomputers from the late 1970s through the 1980s.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Virtual Address eXtension canonical | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
CISC architecture
ⓘ
computer architecture ⓘ instruction set architecture ⓘ |
| abbreviation | VAX ⓘ |
| addressSpaceSize | 32-bit virtual address space ⓘ |
| architectureWidth | 32-bit ⓘ |
| commercialAvailability | late 1970s ⓘ |
| commonlyUsedWith |
Ultrix
NERFINISHED
ⓘ
VAX/VMS NERFINISHED ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designedBy | Digital Equipment Corporation engineers ⓘ |
| designedFor |
multi-user systems
ⓘ
time-sharing systems ⓘ |
| developer | Digital Equipment Corporation NERFINISHED ⓘ |
| hasFeature | virtual address extension over 16-bit predecessors ⓘ |
| influenced |
VMS operating system design
ⓘ
later DEC architectures ⓘ |
| influencedBy | PDP-11 architecture NERFINISHED ⓘ |
| instructionSetType | complex instruction set computing ⓘ |
| introducedInDecade | 1970s ⓘ |
| marketSegment | minicomputer market ⓘ |
| notableImplementation |
MicroVAX
NERFINISHED
ⓘ
VAX-11 series NERFINISHED ⓘ VAXstation NERFINISHED ⓘ |
| peakUsePeriod | 1980s ⓘ |
| predecessor | PDP-11 architecture NERFINISHED ⓘ |
| registerCount | 16 general-purpose registers ⓘ |
| status | discontinued ⓘ |
| supports |
bit-field operations
ⓘ
byte-addressable memory ⓘ condition codes ⓘ floating-point instructions ⓘ hardware stack ⓘ integer arithmetic instructions ⓘ interrupt handling ⓘ orthogonal instruction set ⓘ paged memory management ⓘ privilege levels ⓘ procedure call instructions ⓘ rich addressing modes ⓘ string manipulation instructions ⓘ virtual memory ⓘ |
| targetApplication |
commercial data processing
ⓘ
scientific computing ⓘ |
| usedIn | minicomputers ⓘ |
| widespreadUse | 1980s minicomputers ⓘ |
| wordSize | 32-bit word ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.