Re: [Simulavr-devel] test mechanism

[ThomasK]

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