Hi there!
FFFE is the BRK vector as well :-)
Bang ! Somehow I mixed things up and thought BRK used NMI vector.
Thanks for pointing this out to me (Chris too!).
I'm using it while developing as in
LDA INTIM
BMI TimerExpired
BNE WaitIntimReady
RTS
TimerExpired
BRK
Or I place it right after a bankswitch...
Or replace *any* JMP with BRK. Especially when you have a JMP target that
is used more then once, BRK saves you two bytes for any addtitional JMP to
that target...
There's also possibly a few hardcore tricks where you can strobe two
registers in... like... 2 cycles I think...
STA SWACNT ;Set PORTB to inputs
STA SWBCNT ;Set PORTA to inputs
Save another 6 bytes by removing those two STAs... ;-)
So you don't need to initialize those RIOT ports ever ???
No. At least not if your not going to *send* something throught those
ports...
Greetings,
Manuel
