VAX-11/780
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VAX-11/780 systems
| VAX-11/780 | |
| Summary | |
|---|---|
| Announcement date: | November 1977 |
| Codename: | Star |
| OS support (VMS): | VMS V1.5 |
| CPU Details | |
| Number of processors: | 1 |
| CPU technology: | Bipolar Schottky |
| CPU cycle time: | 200ns |
| Instruction-buffer: | 8 bytes [1] |
| Translation-buffer: | 128 entries [1] |
| Control store: | 4K 99-bit words [1] |
| Gate delay: | 3ns |
| User Writable Control Store: | 2K 99-bit words [1] |
| Cache: | 8KB [1] |
| Compatibility mode: | Yes [1] |
| Console processor: | LSI-11 [1] |
| Console device: | RX01 [1] |
| Memory | |
| Minimum memory: | 2MB |
| Maximum memory: | 64MB |
| Physical address lines: | 30 |
| Memory checking: | 8-bit ECC/longword [1] |
| I/O | |
| Max I/O throughput: | 5.0MB/s |
| MASSBUS: | 4 @ 2.0MB/s |
| UNIBUS: | 4 @ 1.5MB/s |
| LAN support: | optional |
| Performance | |
| VUPs: | 1.0 |
The VAX-11/780 was the first member to ship of the VAX-11 family of supercomputers.
It was announced on October 25th, 1977 at Digital Equipment Corporation's Annual Meeting of Shareholders.[4]
The VAX series was conceived as a follow-on to the successful PDP-11 series of minicomputers.
One of the main design goals was to increase the address space available, in fact the VAX acronym originally stood
for Virtual Address eXtension).[3]
The first VAX-11/780 systems shipped with one quarter of a megabyte of memory, built from 4Kb chips.[3]
The VAX-11/780 was given the codename "Star" and its operating system, VAX/VMS, was codenamed "Starlet".[4] VAX/VMS Version V1.0 shipped in 1978, along with the first revenue-ship 11/780s.
References
[1] VAX Hardware Handbook Volume 1 - 1986.
[2] Systems & Options Catalog. European Edition. Spring 1990.
[3] VAX Architecture Reference Manual. Timothy E. Leonard. 1987. EY-3459E-DP. ISBN 0-932376-86-X.
[4] Nothing Stops It! VAX Open VMS At 20.
