M7164 - KDA50-Q board 1 of 2
M7164 is the processor module, the first of two boards that make up the KDA50-Q SDI QBus Disk Adapter. The processor module is the control portion of the KDA50. The second board that makes up the KDA50 is the Communications Interface (M7165).
Main features
- Performs all KDA50 interaction with the QBus using two registers: The initialising and polling (IP register, and the status/address (SA) register. A switch pack is used to set the I/O page register address (CSR).
- Reports microcode-detected errors through four LEDs on the processor module and four LEDs on the SDI module. The reported error code indicates the defective module.
- Has dual microprocessors containing two 12-bit microprogram sequencers that share a common 16-bit ALU. This microprocessor is capable of simultaneously executing two independent interleaved microprograms from ROM. One of the sequencers controls the KDA50 to host interaction, and the other controls the KDA50 to disk drive interaction. For greater efficiency, one sequencer fetches an instruction while the other executes an instruction.
Documentation
Images
Click on the images below for a larger version.
In Collection
| Qty: | Systems: | Module: | Option: |
| 1 | lhnvax | M7164 | KDA50-Q |