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Announcement date: 2 April 1984
Codename: Superstar
OS support (VMS): VMS V3.4
OS support (ULTRIX): Ultrix V1.0
CPU Details
CPU name (VMS): KA785
Number of processors: 1
CPU technology: Advanced Schottky
CPU cycle time: 133ns [1]
Instruction-buffer: 8 bytes [1]
Translation-buffer: 128 entries [1]
Control store: 0.5KB 99-bit words [1]
Writable Control Store: 6.5K 99-bit words [1]
User Writable Control Store: 1K 99-bit words [1]
Cache: 32KB [1]
Compatibility mode: Yes [1]
Console processor: LSI-11 [1]
Console device: RX01 [1]
Minimum memory: 2MB
Maximum memory: 64MB [1]
Memory checking: 8-bit ECC/quadword [1]
Max I/O throughput: 13.3MB/s [1]
MASSBUS: 4 @ 2.0MB/s
UNIBUS: 4 @ 1.5MB/s
LAN support: optional
VUPs: 1.5 - 1.7 [3]

The VAX-11/785 was an upgraded version of the /780; its CPU used Advanced Schottky logic. A /780 could be upgraded to a /785 by replacing the CPU's cards.

See also


[1] VAX Hardware Handbook Volume 1 - 1986.
[2] CPU Upgrade Guide. Spring-Summer 1992.
[3] VAXcluster Systems Guidelines for VAXcluster System Configurations". EK–VAXCT–CG–006

External links