Pbp3.1.1

[tumbleweed]

You raise some good points about how/where everything is located.

I think the gains in using vectored interrupts would depend a lot on how many interrupts your program uses.
If you use a lot of interrupts then having individual vectors can speed it up quite a bit since you don't have to test the IE and IF flags for each interrupt.
If you only use one or two then the gain might not be that much, if any.

I suppose you could have different vectors storing different context data so there's that to consider. You might have to do a lot of that by hand, though.

Either way you get the fast hardware context saving for both low and high priorities, so that's a boost (assuming you change DT-INTS to remove that duplicate code).

[mpgmike]

I've used 7 or 8 interrupts in a single program in the past. I agree that for 1 or 2, it makes more sense to just use the conventional High/Low Priority Interrupts, which the K42 can do as well. Even with High/Low Priority, default addresses are 000008h for High and 000018 for Low. These can be changed with IVTBASE the same as the Vectored Ints. Since it's something new, I had to try to figure it out. The Data Sheet showed how to load the Vector Table Start Address at 004008h. I tried loading it at 0008, but didn't understand what was being done well enough to get it to work. Using the example 4008h, it worked.