VAX 8650

VAX 8650
Summary
Announcement date:	4 December 1985
Codename:	Morningstar
OS support (VMS):	V4.3
CPU Details
CPU module:	KA865
Number of processors:	1
CPU technology:	ECL Gate Array
CPU cycle time:	55ns
CPU clock:	18.18MHz
Instruction-buffer:	8 bytes [1]
Translation-buffer:	512 entries [1]
Writable Control Store:	8K 86-bit words [1]
Cache:	16KB [1]
Compatibility mode:	Yes
Console processor:	T-11 [1]
Console device:	RL02 [1]
Memory
Minimum memory:	16MB [1]
Maximum memory:	368MB
Memory checking:	7-bit ECC/longword [1]
I/O
Max I/O throughput:	26MB/s
SBI:	1-2 [1]
MASSBUS:	4 @ 2.0MB/s [1]
UNIBUS:	7 @ 1.5MB/s
LAN support:	optional
Performance
VUPs:	6

The VAX 8650 was an improved version of DEC's second-generation VAX, the VAX 8600. An 8600 could be field-upgraded to an 8650.

From Wikipedia

The VAX 8650, code-named "Morningstar", was a faster version of the VAX 8600 introduced on 4 December 1985. It was originally to be named "VAX-11/795", but was renamed before launch. The VAX 8600 was the last VAX to be 100% compatible with the VAX-11/780 and VAX-11/785, to have the PDP-11 compatibility mode, and to use the SBI also used by the VAX-11/78x. The CPU had a 55 ns cycle time (18.18 MHz).

This page contains content from Wikipedia, article VAX_8000#VAX_8650, under the Creative Commons license.

References

• [1] VAX Hardware Handbook. Volume 2-1986.

External links

• 8600 - documentation at Bitsavers
  • VAX 8600 System Upgrade Procedure (EK-8600I-S1-001)
• VAX Hardware Handbook Volume 2 - the VAX 8650 is described on page 1-9 (pg. 18 of the PDF) and covered in detail in Chapter 3 (pp. 50-76)
• VAX 8600/8650 SBIA Technical Description (EK-DB86X-TD-002)