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Inside Macintosh: Operating System Utilities /

Chapter 9 - Start Manager / Start Manager Reference

Routines / Getting and Setting the Timeout Interval

GetTimeout
You can use the GetTimeout procedure to identify the current timeout interval set for the startup drive.
PROCEDURE GetTimeout (VAR count: Integer);
count
Indicates the number of seconds the system waits for the startup drive to respond during the boot cycle. A value of 0 indicates the default timeout of 20 seconds.

DESCRIPTION
The GetTimeout procedure identifies the current timeout interval set for the startup drive. Timeout values increment in 1-second intervals, from 1 to a maximum of 31 seconds. A count of 1 equals 1 second.

ASSEMBLY LANGUAGE INFORMATION
The register on exit from the routine is
Registers on exit
A0 Value of count field

The _GetTimeout macro expands to invoke another trap macro, whose routine selector is passed in the A0 register.
Trap Macro Selector
_InternalWait $0000

Registers on exit
A0	Value of `count` field

Trap Macro	Selector
_InternalWait	$0000

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