VAX-11/785

VAX-11/785
Summary
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]
Memory
Minimum memory:	2MB
Maximum memory:	64MB [1]
Memory checking:	8-bit ECC/quadword [1]
I/O
Max I/O throughput:	13.3MB/s [1]
MASSBUS:	4 @ 2.0MB/s
UNIBUS:	4 @ 1.5MB/s
LAN support:	optional
Performance
VUPs:	1.5 - 1.7 [3]

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

References

[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

• 785 - documentation on BitSavers
  • VAX-11/785 Hardware User's Guide (EK-11785-UG-PRE)