|The All Mighty
The Microvax II Motherboard
The M7606 or 50-16523-02 A1
Microvax II motherboard
The KA630 is a quad-height VAX processor module for the Q22-Bus. The 78032 CPU
chip is a 32-bit virtual memory microprocessor packaged in a 68-pin ZMOS
(double metal NMOS) chip. At its maximum frequency, the Microvax CPU chip
achieves a 200ns microcycle and a 400ns I/O (memory) cycle.
As a point of reference, the 80386 circa 1986/1987 ran with a 16MHz clock.
Microvax Interface Gate Array
The Microvax interface gate array consists of two custom Large Scale Integration
(LSI) chips. The gate array includes the following features:
- Provides interface between the Microvax CPU, FPU and module logic
- Provides signals to the KA630-AA LEDs indicating consile and diagnostic
- Decodes signals from the KA630-Aa connector J2 to determine module
characteristics. (J2 is to the "console" module that includes TOY, batteries
and battery backed up config memory).
- Contains a local decoder and address latch, for use by the memory
subsystem and other KA630 logic elements.
Links to other resources:
||The Microvax II CPU and motherboard manual (PDF format). Note
that this manual is for the first version of the Microvax-II with slightly
different chip layouts than those picture above.
Microvax II hardware manual
||This PDF file contains the various documents that described
how to install run and configure a microvax II.
Microvax II Diagnostics kit
||The Microvax II's console was extremely primitive and lacked
basic functions such as diagnostics, configuration display and more
importantly, a disk formatter. This ZIP file contains the files that were found
on a MVII Diagnostics tape (AQ-QL5AH-DN) labeled "MVII DIAG CUST TK50".
This has not been tested. The AAA_README.TXT file provides some explanation.
There is also a file that copies files to a tape in the order they were present
on the original TK50.
Addendum: After initializing the tape to which you copy the files, you need to MOUNT/BLOCKSIZE=512
You should also use the /contiguous and /truncate switches on the copy commands.
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