[Info-vax] vms 5.4 cmd cqd-220/T disk not seen

[Stephen Hoffman]

On 2021-06-27 14:53:59 +0000, blockhouse007 said:

> Am I missing something obvious, any support appreciated to stop my 
> brain from exploding.

I do not know how much you know about Q-Bus.

You are aware that you have to reset all controllers when adding or 
removing Q-bus boards, correct?

If not... SYSGEN tells you its desires, and—if you never lie to SYSGEN 
CONFIGURE, and describe the complete configuration—you will get a 
working CSR and vector configuration.

SYSGEN *LIES* about the current vector settings. In any SYSGEN 
configuration display, SYSGEN displays the desired settings. Not the 
actual vector settings. SYSGEN LIES.

If the Q-Bus CSR setting is wrong, you may not see the device, or you 
may see the wrong device, or you may see a whole barrage of wrong 
devices.

The only Q-Bus boards that will ~always have correct vectors are the 
soft-loaded boards. All hardware switchpack-encoded Q-Bus boards will 
show the desired settings in SYSGEN displays, not the actual settings.

SYSGEN CONFIGURE will generate a CSR and vector configuration which you 
then need to establish across all Q-Bus controllers present.

Adding or removing one Q-bus controller can and variously does require 
switchpack changes to some or all of the other Q-Bus controllers 
present.

SYSGEN and SYSGEN CONFIGURE here also refers to the console Q-Bus 
display and Q-Bus configuration tools found on the 3000 series and 
newer MicroVAX consoles.


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Pure Personal Opinion | HoffmanLabs LLC