Docs » Autodocs » exec.library » SetSR
SetSR -- get and/or set processor status register
oldSR = SetSR(newSR, mask)
D0 D0 D1
ULONG SetSR(ULONG, ULONG);
This function provides a means of modifying the CPU status register
in a "safe" way (well, how safe can a function like this be
anyway?). This function will only affect the status register bits
specified in the mask parameter. The prior content of the entire
status register is returned.
newSR - new values for bits specified in the mask.
All other bits are not effected.
mask - bits to be changed
oldSR - the entire status register before new bits
EXAMPLES
To get the current SR:
currentSR = SetSR(0,0);
To change the processor interrupt level to 3:
oldSR = SetSR($0300,$0700);
Set processor interrupts back to prior level:
SetSR(oldSR,$0700);
|
