VAX instruction set architecture
GPTKB entity
Properties (49)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:microprocessor
|
| gptkbp:addressed |
Direct addressing
Indexed addressing Indirect addressing Register indirect addressing Base plus offset addressing |
| gptkbp:architecturalStyle |
CISC
|
| gptkbp:developedBy |
gptkb:Digital_Equipment_Corporation
|
| gptkbp:firstIntroduced |
1977
|
| https://www.w3.org/2000/01/rdf-schema#label |
VAX instruction set architecture
|
| gptkbp:instructionSet |
gptkb:VAX_assembly_language
Immediate operands Memory operands Multi-byte instructions Register operands Single-byte instructions |
| gptkbp:legacy |
Used in academic settings
Influenced modern architectures Retired in the 2000s Still studied in computer architecture courses |
| gptkbp:notableEvent |
gptkb:SIMH
gptkb:VAX_11/780_emulator gptkb:VAX_emulator |
| gptkbp:notableFeature |
Memory management
Variable-length instructions Support for floating-point operations Rich addressing modes |
| gptkbp:operatingHours |
gptkb:BSD_UNIX
Linux OpenVMS VMS Ultrix |
| gptkbp:performance |
Superscalar execution
Pipeline architecture Microcode_execution |
| gptkbp:RAM |
32-bit addressing
|
| gptkbp:registration |
General-purpose registers
Control registers Floating-point registers Segment registers |
| gptkbp:relatedTo |
PDP-11_architecture
|
| gptkbp:successor |
Alpha architecture
|
| gptkbp:supports |
Complex instruction set computing (CISC)
|
| gptkbp:type |
Integer
String Array Character Floating-point |
| gptkbp:usedIn |
gptkb:VAX_computers
|