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GuruMeditation
Docs » Autodocs » exec.library » SetSR

NAME

	SetSR -- get and/or set processor status register

SYNOPSIS

	oldSR = SetSR(newSR, mask)
D0 D0 D1
ULONG SetSR(ULONG, ULONG);

FUNCTION

	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.

INPUTS

	newSR - new values for bits specified in the mask.
All other bits are not effected.
mask - bits to be changed

RESULT

	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);

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