Difference between revisions of "VAX 8800"

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The '''VAX 8800''' comes in four models, depending on the number of [[Central Processing Unit|CPUs]] installed in the basic cabinet:
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The '''VAX 8800''' is a dual-[[Central Processing Unit|CPU]] version of the [[VAX 8700]].
  
* VAX 8810 - 1 CPU
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(The designation 'VAX 8800' is occasionally used for the whole first generation of VAX 8800 computers - correctly called [[VAX 85x0, 8700, 88xx, and 897x systems|VAX 8800 Family]] - as well, leading to confusion sometimes.)
* VAX 8820 - 2 CPUs
 
* VAX 8830 - 3 CPUs
 
* VAX 8840 - 4 CPUs
 
  
The first three may be upgraded in the field by the installation of additional CPU(s).
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It belongs to the first generation of VAX 8800 computers, which includes four more models:
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* [[VAX 8500/VAX 8530|VAX 8500]]
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* [[VAX 8500/VAX 8530|VAX 8530]]
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* [[VAX 8550]]
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* [[VAX 8700]]
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When the second generation of VAX 88xx computers came out in 1987, the VAX 8800 was renamed to '''VAX 8820N''' ('''N''' for '''Nautilus''')
  
 
== References ==
 
== References ==
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* [http://www.bitsavers.org/pdf/dec/vax/handbook/VAX_Hardware_Handbook_Volume_2_1986.pdf VAX Hardware Handbook Volume 2] - the VAX 8800 is covered in Chapter 2 (pp. 24-49 of the PDF)
 
* [http://www.bitsavers.org/pdf/dec/vax/handbook/VAX_Hardware_Handbook_Volume_2_1986.pdf VAX Hardware Handbook Volume 2] - the VAX 8800 is covered in Chapter 2 (pp. 24-49 of the PDF)
 
* [http://www.bitsavers.org/pdf/dec/vax/8800/ 8800] - VAX 88xx documentation at [[Bitsavers]]
 
* [http://www.bitsavers.org/pdf/dec/vax/8800/ 8800] - VAX 88xx documentation at [[Bitsavers]]
** [http://www.bitsavers.org/pdf/dec/vax/8800/EK-8840H-UG-001_88xx_System_Hardware_Users_Guide_Mar88.pdf VAX 8820/8830/8840 System Hardware User's Guide] (EK-8840H-UG-001)
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{{Nav VAX}}
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[[Category: DEC VAX systems]]
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[[Category: DEC Mainframes]]

Revision as of 23:10, 1 January 2024


VAX 8800
Summary
Announcement date: 29 January 1986
FRS date: February 1986
Codename: Nautilus
OS support (VMS): VMS V4.4
CPU Details
CPU module: KA88
Number of processors: 2
VMS DCL CPU: 6
VMS DCL XCPU: 0
SID: 06045060
XSID: 000009F7
CPU technology: ECL Gate Array [1]
CPU cycle time: 45ns [1]
Instruction-buffer: 16 bytes [1]
Translation-buffer: 1024 entries [1]
Writable Control Store: 15K 143-bit words [1]
User Writable Control Store: 1K 143-bit words [1]
Cache: 64KB
Console processor: PRO380
Memory
Minimum memory: 48MB
Maximum memory: 12000003
Memory checking: 7-bit ECC/longword
I/O
Max I/O throughput: Over 30MB/s [1]
UNIBUS: 2 @ 1.5MB/s
VAXBI: 4 @ 13.3MB/s
LAN support: optional
Performance
VUPs: 12


The VAX 8800 is a dual-CPU version of the VAX 8700.

(The designation 'VAX 8800' is occasionally used for the whole first generation of VAX 8800 computers - correctly called VAX 8800 Family - as well, leading to confusion sometimes.)

It belongs to the first generation of VAX 8800 computers, which includes four more models:

When the second generation of VAX 88xx computers came out in 1987, the VAX 8800 was renamed to VAX 8820N (N for Nautilus)

References

[1] "VAX 8800 Family", Digital Technical Journal, Vol 1 No 4, February 1987.
[2] VAX Hardware Handbook. Volume 2-1986.

External links