11/45 progress

[Guy Sotomayor]

Jay West wrote:
>
> Next I would like a way to test interrupts in this minimal 
> configuration (that was where the problem was before, no matter what 
> device interrupted it would always trap to the same address). I would 
> assume I have to put something like an M7856 in next in order to test 
> this. Sound like a reasonable next step? Remember, in the config I 
> have right now I've just got 3 quad SPC slots... hex cards are not an 
> option (yet).
>
One of the easiest things to do is to use the LTC (on the M7856) and 
write a small program that counts at 60Hz (or any sub-multiple) on each 
"tic".  The counter (if in R0) will be displayed on the console lights 
when you're in a WAIT.

One thing you want to check is to make sure that your backplane is *not* 
wired to have an M787 be the LTC (mainly for the grant chain).  
Otherwise, you'll have to use the M787 and disable the LTC function on 
the M7856.

-- 

TTFN - Guy