|Announcement date:||November 1977|
|OS support (VMS):||VMS V1.5|
|Number of processors:||1|
|CPU technology:||Bipolar Schottky|
|CPU cycle time:||200ns|
|Instruction-buffer:||8 bytes |
|Translation-buffer:||128 entries |
|Control store:||4K 99-bit words |
|User Writable Control Store:||2K 99-bit words |
|Compatibility mode:||Yes |
|Console processor:||LSI-11 |
|Console device:||RX01 |
|Physical address lines:||30|
|Memory checking:||8-bit ECC/longword |
|Max I/O throughput:||5.0MB/s|
|MASSBUS:||4 @ 2.0MB/s|
|UNIBUS:||4 @ 1.5MB/s|
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. 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).
The first VAX-11/780 systems shipped with one quarter of a megabyte of memory, built from 4Kb chips.
The VAX-11/780 was given the codename "Star" and its operating system, VAX/VMS, was codenamed "Starlet". VAX/VMS Version V1.0 shipped in 1978, along with the first revenue-ship 11/780s.