|Announcement date:||14 May 1985|
|FRS date:||May 1985|
|OS support (VMS):||MicroVMS V4.1M|
|CPU name (VMS):||KA630|
|CPU name (console):||KA630|
|Number of processors:||1|
|VMS DCL CPU:||8|
|VMS DCL XCPU:||1|
|CPU cycle time:||200ns |
|Instruction-buffer:||8 bytes |
|Translation-buffer:||8 entries |
|Console device:||RX50 or TK50|
|Minimum memory:||1MB |
|Maximum memory:||16MB |
|On-board memory:||1MB |
|Q-bus:||1 @ 3.3MB/s |
|LAN support:||optional |
The MicroVAX II was a personal computer VAX, with the KA630 CPU for its CPU. Its bus between the CPU and main memory was a special bus carried on over the back connectors as well as the CD interconnect of the QBUS backplane; it used the QBUS for its I/O bus.
The following operating systems can run on the MicroVAX II:
MicroVMS / VMS
In version 4 of the VMS operating system there were two different subversions:
- MicroVMS - for the series of MicroVAX computers
- VMS - for all other VAX computers
Both versions differ in contents and packaging:
- MicroVMS software was distributed as set of numerous RX50 diskettes or on TK50 tape cassettes.
- VMS software was available on standard 9-track magnetic tape or on removable disks, e.g. RL02 or RA60.
From version V5.0 onwards there was no more special version for the series of MicroVAX computers.
MicroVMS Support for MicroVAX II Computers
MicroVMS V4.1 was the first version to support the MicroVAX II computer.
VMS Support for MicroVAX II Computers
Some of the 'full size' VMS V4.x versions include MicroVAX II support, too, see the following table for details:
|VMS V4.x Support for MicroVAX computers|
|Version||Type||Date||MicroVAX Support||Save Set Info|
|V4.1||Update||11-JAN-1985||YES||VMS041.A: VMS041 / VMS041.B: VMS only / VMS041.C: MicroVMS only|
|V4.3||Update||9-JAN-1986||YES||VMS043.A: Common Files / VMS043.B: VMS only / VMS043.C: MicroVMS only|
|V4.4||Full||30-MAR-1986||YES||Integral part of all Save Sets|
|V4.5||Update||26-SEP-1986||YES||Same as with V4.3 (individual Save Sets)|
|V4.6||Full||15-JUN-1987||YES||Same as with V4.4 (integral part of all Save Sets)|
|V4.7||Update||29-OCT-1987||YES||Same as with V4.3 (individual Save Sets)|
Many UNIX variants were available for the MicroVAX II.
Version 1.2 and higher of the VAX port of NetBSD can run on a MicroVAX II. I've even built some instructions using SIMH on how to do so, that may be adapted to a real MicroVAX but I don't have one to test with.
OpenBSD can run on the MicroVAX II as well, later versions are better for timing issues... 4.4 is the current good version.
The MicroVAX II is emulated in SIMH.
- VAX 630 - documentation at Bitsavers
- MicroVAX II 630QY, 630QZ Technical Manual (AZ-FE06A-TN)
- SIMH information on the CPU in the MicroVAX II
|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|