Hi Michael,
now I know, what you mean. It took a little bit time on me. ;-) Yes,
that's a real core change, which changes the behaviour of CBI and SBI. A
feature, that can make people unlucky!
It looks so, that newer AVR cores (and devices) have this,
M48/88/168/328 and also M164/324/644 and Tiny2313 and so one.
Behaviour in simulavr is now like in M128, means read complete byte,
modify, write complete byte. For the new behaviour we need a new
interface for IO registers, one is clearBit(bitnum), the other
setBit(bitnum), not only read byte: operator char() and write byte:
operator=. And then, of course, for all the hardware units, which have
to provide this, not only a get and set method, but also a getbit/setbit
method or other modifybit(bitval, bitnum).
And a flag for the core to signal old/new behaviour.
All together a "nice" piece of work ... ;-)
Question at all: do we have also some other "nice" features, which
change the behaviour of core?
cu, Thomas
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