Microvax II hardware not recognized

Jon Elson elson at pico-systems.com
Thu Aug 18 21:14:57 CDT 2016

On 08/18/2016 03:39 PM, Noel Chiappa wrote:
>      > From: Paul Koning
>      > A lot of Unibus/Qbus devices have "floating CSRs" which means they
>      > don't have fixed address assignments. Instead, the correct address is
>      > based on a set of rules, which puts devices in an ordered list and
>      > assigns addresses in sequence. .. If you get the address wrong, the
>      > system will see the device as the wrong type
> What about if you have a series of devices (A, B, C, D, E), assigned addresses
> in the correct order, and then you remove C from the system; will the software
> stop probing for more devices when it gets to C (ie. D and E, although still
> plugged in, will not be seen)?
This can mess up the whole scheme.  I just gave up on the 
auto assignment of addresses, and wrote a script to 
configure the devices.  This was a big help as I was often 
putting boards in and out of the system.

(I went looking for the file and couldn't find it.)


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