Legacy Documentclose button

Important: The information in this document is obsolete and should not be used for new development.

Previous Book Contents Book Index Next

Inside Macintosh: Devices /
Chapter 6 - Power Manager / Power Manager Reference
Power Manager Dispatch Routines / Controlling the Hard Disk

IsSpindownDisabled

You can use the IsSpindownDisabled function to find out whether automatic hard disk spindown is enabled.

Boolean IsSpindownDisabled();
DESCRIPTION
The IsSpindownDisabled function returns a Boolean true if automatic hard disk spindown is disabled, or false if spindown is enabled.

ASSEMBLY-LANGUAGE INFORMATION
The trap is _PowerMgrDispatch ($A09E). The selector value for IsSpindownDisabled is 8 ($08) in the low word of register D0. The Boolean result is passed in the low byte of register D0.

Previous Book Contents Book Index Next

© Apple Computer, Inc.
3 JUL 1996