VAX 8250

VAX 8250
Summary
Announcement date:	2 March 1987
Codename:	Sargas
OS support (VMS):	VMS V4.5
OS support (ULTRIX):	ULTRIX V2.0 [1]
CPU Details
CPU name (VMS):	KA825
CPU name (console):	None
CPU module:	KA825
Module:	T1001-YA
Number of processors:	1
VMS DCL CPU:	5
VMS DCL XCPU:	0
SID:	05903914
XSID:	00000000
CPU chip:	V11 [1]
CPU technology:	ZMOS
CPU cycle time:	160ns
CPU clock:	6.25MHz [1]
Instruction-buffer:	8 bytes [2]
Translation-buffer:	512 entries
Control store:	15K 40-bit words [2]
Writable Control Store:	1K 40-bit words [2]
Cache:	8KB (160ns) [2]
Compatibility mode:	No
Console processor:	CPU
Console device:	None
Memory
Minimum memory:	4MB
Maximum memory:	128MB [2]
Memory checking:	7-bit ECC/longword [2]
I/O
Max I/O throughput:	13.3MB/s [2]
UNIBUS:	1 @ 1.5MB/s
VAXBI:	1 @ 13.3MB/s
LAN support:	optional
Performance
VUPs:	1.2 [2]

The VAX 8250 is an improved version of the VAX 8200 mid-range VAX uni-processor system built around the VAXBI bus; it has the improved KA825 CPU in place of the KA820 CPU of the VAX 8200.

References

[1] KA825 Maintenance Advisory. EK-KA825-MA-001

[2] VAX Systems Hardware Handbook -- VAXBI Systems. EB-31692-46

External links

• 8200 - documentation at Bitsavers
• KA820/KA825 Processor Technical Manual (EK-KA820-TM-003)
• KA825 Maintenance Advisory (EK-KA825-MA-001)
• VAX 8200 to VAX 8350 and VAX 8250 to VAX 8350 Upgrade Procedures (EK-83XUP-IN-001)