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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