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Inside Macintosh: Operating System Utilities /

Chapter 7 - Parameter RAM Utilities / Parameter RAM Utilities Reference

Routines /

InitUtil

System software uses the InitUtil function at startup time to copy values from parameter RAM and date and time information into low memory. Your application should never need to use this function.

FUNCTION InitUtil: OSErr;

DESCRIPTION

The InitUtil function copies the contents of parameter RAM into 20 bytes of low memory and calls the Date, Time, and Measurement Utilities' ReadDateTime function to copy the date and time from the clock chip into a separate low-memory location.

If the validity status in parameter RAM is not $A8 when InitUtil is called, InitUtil returns a non-zero result code. In this case, the default values are read into the low-memory copy of parameter RAM; these values are then written to the clock chip.

ASSEMBLY-LANGUAGE INFORMATION

The registers on exit for the InitUtil function are

Registers on exit
D0	Result code

RESULT CODES

noErr	0	No error
prInitErr	-88	Validity status not $A8

SEE ALSO

For more information about the ReadDateTime function, see the chapter "Date, Time, and Measurement Utilities" in this book.