[fa.info-mac] disk spinning during macsbug

info-mac@uw-beaver (info-mac) (07/13/84)

From: Bill Croft <croft@safe>
Since the disk drive motor is shut off with a software timeout,
it can remain on "forever" if you hit a breakpoint in macsbug
while it's spinning.  Bruce Horn offers this advice:

	Yep, you're right, it's timed in software.  
	The address to kill the motor is the IWM, DFF1FF.  
	Just do a DM DFF1FF in the debugger and it should turn the thing off.
	
	Bruce