PDP-8 diagnostics SR settings?

Johnny Billquist bqt at update.uu.se
Sat Sep 5 11:24:30 CDT 2015

On 2015-09-05 18:20, Charles wrote:
> I got lucky with a little trial & error. Setting the MSB of the SR (i.e.
> 7000) causes AJRLIA to report an error but then keep testing.
> Not sure if this works for all the AJ**** diagnostics but hopefully DEC
> had some kind of pseudo-standard for this...

Nit picking: The MSB would be 4000. :-)
But yes, DEC often did use similar bits for similar purposes in 
different diagnostics, especially if they are for the same device. So 
there is a fair chance that you'll get the same effect from other 
diagnostics with the same switch register settings.


Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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