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VAX-11/780 systems

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]
Minimum memory: 2MB
Maximum memory: 64MB
Physical address lines: 30
Memory checking: 8-bit ECC/longword [1]
Max I/O throughput: 5.0MB/s
MASSBUS: 4 @ 2.0MB/s
UNIBUS: 4 @ 1.5MB/s
LAN support: optional
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.


[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.