DC-820 Hard Disk/Floppy Controller Settings and Configuration

Data bus:	32-bit, EISA
Size:	Full-length, full-height card
Hard drive supported:	Up to seven SCSI devices
Floppy drives supported:	Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS
Function	Location
50-pin SCSI connector - external	CN1
50-pin SCSI connector - internal	CN2
34-pin control cable connector - floppy drive	CN3
4-pin connector - drive active LED	JP1
4-pin connector - cache error speaker	JP2

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive enabled	JP3	closed
	Floppy drive disabled	JP3	open

DRIVE ACTIVE LED ERROR CODES (IMMEDIATELY AFTER POWER-UP)
Status	Function
One short flash	DC-820 CPU error
Two short flashes	SCSI chip error
Three short flashes	BMIC (EISA bus) chip error
Four short flashes	SRAM error
Five short flashes	EPROM checksum error

MISCELLANEOUS TECHNICAL NOTES

All four sockets of Bank 0 must be filled with SIMMs of the same size - 256KB, 1MB, or 4MB.