Difference between revisions of "MicroVAX III"
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| − | + | '''MicroVAX III''' was the generic name erroneously given to the 3rd-generation series of [[Digital Equipment Corporation|DEC]] [[VAX]] [[microcomputer]]s by the computer press. It was not a formal [[DEC]] product name; the confusion probably occurred because the [[KA630 CPU]] of the [[MicroVAX II]] was succeeded by the [[KA650 CPU]], and people assumed the name of the VAX systems which used it followed. | |
| − | {{stub}} | + | The KA650 CPU was implemented in [[VLSI]]. |
| + | |||
| + | These computers used the [[QBUS]] for their [[input/output|I/O]] only; [[main memory]] traffic used the [[KA650 Main Memory System]], which used a special [[bus]] carried on [[over the back]] connectors as well as the [[CD interconnect]] of the QBUS [[backplane]]. (The [[address space]] of the QBUS was limited to 4MB, and the data section is only 16 bits wide, so there were good reasons for partially replacing it.) | ||
| + | |||
| + | Systems which used the KA650 included: | ||
| + | |||
| + | * [[MicroVAX 3500/3600|MicroVAX 3500]] | ||
| + | * [[MicroVAX 3500/3600|MicroVAX 3600]] | ||
| + | * [[VAXserver 3500/3600|VAXserver 3500]] | ||
| + | * [[VAXserver 3500/3600|VAXserver 3600]] | ||
| + | * [[VAXstation 3200/3500|VAXstation 3200]] | ||
| + | * [[VAXstation 3200/3500|VAXstation 3500]] | ||
| + | |||
| + | {{semi-stub}} | ||
| + | <!-- | ||
| + | ==See also== | ||
| + | --> | ||
| + | ==External links== | ||
| + | |||
| + | * [http://www.bitsavers.org/pdf/dec/vax/650/ VAX 650] - documentation at [[Bitsavers]] | ||
| + | |||
| + | {{Nav VAX}} | ||
| + | |||
| + | [[Category: DEC VAX systems]] | ||
| + | [[Category: QBUS VAXen]] | ||
Latest revision as of 01:17, 2 January 2024
MicroVAX III was the generic name erroneously given to the 3rd-generation series of DEC VAX microcomputers by the computer press. It was not a formal DEC product name; the confusion probably occurred because the KA630 CPU of the MicroVAX II was succeeded by the KA650 CPU, and people assumed the name of the VAX systems which used it followed.
The KA650 CPU was implemented in VLSI.
These computers used the QBUS for their I/O only; main memory traffic used the KA650 Main Memory System, which used a special bus carried on over the back connectors as well as the CD interconnect of the QBUS backplane. (The address space of the QBUS was limited to 4MB, and the data section is only 16 bits wide, so there were good reasons for partially replacing it.)
Systems which used the KA650 included:
External links
| v • d • e VAX Computers and Operating Systems |
|---|
| VAX-11/7xx (including VAX 86x0) - VAX-11/780 • VAX-11/785 • VAX-11/750 • VAX-11/730 • VAX 8600 • VAX 8650
VAX 8000 series (excluding VAX 86x0) - VAX 82xx/83xx series • VAX 85x0/8700/88xx series MicroVAXen (many types also come in VAXserver and VAXstation models) - MicroVAX I • MicroVAX II VAXstation Series - VAXstation I • VAXstation II Late Model VAXen - VAX 4000 series • VAX 6000 series • VAX 7000 series • VAX 9000 series • VAX 10000 series |
| Special Purpose VAXen - VAXft series • rtVAX series • Infoserver series
Clones - CM 1700 • TPA-11/580 |
