Q-Bus Boards

Configuration and Jumper Information

This page collects as a "jumping off" point links to pages that describe the configuration jumpers for Q-bus boards that are useful in a VAX. As I get information I will add links to it here.

DEC Q-Bus Boards

DELQA - DEC M7516 Ethernet Interface
DELQA-PLUS - DEC M7516-YA "Turbo" Programming Manual
DRV11-WA - DEC M7651 16 Bit DMA parallel I/O board.
CXA16 - DEC 3108 Eight Port Async MUX (S-box handles)

Third Party Q-Bus Boards

DQ132 - Dilog Pertec Tape controller interface.
SQ706A - Dilog MSCP SCSI interface for Q-Bus systems
SQ703A - Dilog TMSCP SCSI Tape interface for Q-Bus Systems
UC07 - Emulex SCSI Interface

Firmware Images

The RQDX3 (M7555) is a combination floppy disk and MFM hard drive controller for Q-Bus systems. As time progressed the controller was able to control more types of floppies and drives, the later models could talk to all DEC floppies and MFM drives. I discovered you could "upgrade" an early model by replacing its firmware with a later version. I've save the firmware as INTEL HEX files and put it here.

These files 340E5.HEX and 339E5.HEX are sufficient. (alternate rqdx3.tgz) I don't know if they are the latest, but I do know they work. They are in Intel HEX format. Save them to disk then burn them to a couple of 27128A EPROMs.
The Emulex UC07/UC08 SCSI controller has various flavors of Firmware that affect how well the card works in your VAX. I use the G143R version on my UC07 and UC08 and it works well for me.
There is a bug in NetBSD that sometimes corrupts the firmware in the VAX 4000/90 this is a "good" image I extracted from my 4000/90. Its pure binary (no encoding) so you probably want to right-click or shift-click the link and down load it to a file. I haven't figured out how to flash the motherboard yet but hope to be able to do that soon.

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