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[Johnny Billquist]

On 2017-12-31 04:44, Robert Armstrong wrote:
>> ASTs are synchronous with instruction execution, right?
> 
>    That's exactly the point - the "A" in AST is wrong...

Well, sortof not. It is asynchronous to your program flow.

>> In RSX you have both ASTs and SSTs. Did you know that one? :-)
> 
>    Nope, that  didn't...

Now you do. And SSTs are synchronous to your program flow, but are also 
a software construct.

So, from your program point of view, AST very much corresponds to 
interrupts, and SST corresponds to traps. But call a routine you 
registered, with some arguments giving additional information on the stack.

   Johnny

-- 
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