Maintenance and Service Guide

8-17

Table 8-11. Switch Settings for the Multipurpose Fixed Disk Drive Controller Board (assy. no. 000519 and 000815)

Switch	Setting/Function
SW500-1	OFF = Primary diskette controller address (default)
	ON	= Secondary diskette controller address

SW500-2	OFF = Disable high-speed transfer rates (for systems without 1.2 Megabyte 5¼-Inch
		Diskette Drive or 40-Megabyte Fixed Disk Drive Backup) (default)
	ON	= Enable high-speed transfer rates (for systems with 1.2 Megabyte 5¼-Inch Diskette
		Drive or 40-Megabyte Fixed Disk Drive Backup)
SW500-3	OFF = Enable fixed disk drive
	ON	= Disable fixed disk drive

SW500-4	OFF = Serial interface COM1 IRQ4 (default)
	ON	= Serial interface COM2 IRQ3
SW500-5	OFF = Enable serial port (default)
	ON	= Disable serial port

SW500-6	OFF = Enable parallel port (default)
	ON	= Disable parallel port

Compaq 386 manual Maintenance and Service Guide