Function Name: CLOSE ALL

Purpose: Close all files on a device
Call address: $FF4A (hex) 65354 (decimal)
Preparation:

	Registers:	.A -> device # (FA: 0-31)
	Memory:		system map
	Flags:		none
	Calls:		none

	Registers:	.A used
			.X used
			.Y used
	Memory:		none
	Flags:		none

Description: The FAT is searched for the given FA. A proper CLOSE is performed for all matches. If one of the CLOSEd channels is the current I/O channel, then the default channel is restored. This call is utilized, for example, by the BASIC command DCLOSE. It is also called by the Kernal BOOT routine.

EXAMPLE:

	LDA	#$08
	JSR	$FF4A	;close all files on device 8