Compaq ECQD2KCTE Select desired events muxctl, Select performance monitoring options, = PCMUX0

Table E–1: DECchip 21064/21066/21068 Performance Monitoring Functions (Continued)

Function Register Usage			Comments
Windows NT Alpha
Input:	a0	= 0	Select counter 0
	a0	= 1	Select counter 1
	a1	= 0	Disable selected counter
Select desired events (mux_ctl)
DIGITAL UNIX
Input:	a0	= 2	Function code
	a1	= mux_ctl	mux_ctl is the exact contents of those fields
			from the ICCSR register, in write format,
			described in Table E–2.
Output:	v0 = 1		Success
	v0 = 0		Failure (not generated)
OpenVMS Alpha
Input:	R16 = 2		Function code
	R17 = mux_ctl		mux_ctl is the exact contents of those fields
			from the ICCSR register, in write format,
			described in Table E–2.
Output:	R0 = 1		Success
	R0 = 0		Failure (not generated)
Windows NT Alpha
Input:	a2	= PCMUX0	For ICCSR<PCMUX0> field when a0 = 0
	a2	= PCMUX1	For ICCSR<PCMUX1> field when a0 = 1
	a3	= PC0	For ICCSR<PC0> field when a0 = 0
	a3	= PC1	For ICCSR<PC1> field when a0 = 1

Select performance monitoring options

DIGITAL UNIX
Input:	a0	= 3	Function code
	a1	= opt	Function argument opt is:
			<0> = log all processes if set
			<1> = log only selected if set
Output:	v0 = 1		Success
	v0 = 0		Failure (not generated)

E–6Alpha Architecture Handbook