external cables, respectively. As in the above case, remove the terminators from all devices connected in between.
Store the terminators in a safe place for future use, if necessary.
1.3 Cable Connection (CN1, CN2, & CN3)
There are three connectors on your DC-820B: CN1, CN2, and CN3.
External SCSI drive(s) connector (CN1): This 50-pin high density SCSI-2 connector is for connecting external SCSI devices.
Internal SCSI drive(s) connector (CN2): The 50-pin flat cable should connect to CN2 with its colored stripe, normally red, aligning with Pin 1 of CN2.
Floppy interface connector (CN3): The 34-pin flat cable should be connected to CN3 with its colored edge, normally red, aligning with Pin 1 of CN3.
Note that improper cable connections may damage both the drives and host adapter.
1.4 Cache DRAM Installation
The DC-820B features four SIMM sockets, arranged as one single memory bank. 256KB/1MB/4MB fast page mode SIMMs are required, with a mini- mum access time of 80ns or faster. All four SIMM sockets must be installed with SIMMs of same size, thus three cache sizes are available: 1MB, 4MB, and 16MB. Also, you are allowed to leave all the SIMM banks empty, i.e., Not-Installed or 0MB, if you don't intend to add any Cache DRAM for the time being.
1.5 Powering Up and Entering the System CMOS BIOS Setup
When the DC-820B is inserted in an available EISA bus master slot and the jumpers and cables are properly set, first turn on the power of your external SCSI devices and then the main system power.
When installing a SCSI drive as drive C: (or D:), set the CMOS HDD drive type as not-installed. Note that IDE (Intelligent Drive Electronics)/ST506/ ESDI (Enhanced Small Device Interface) drives always take precedence over SCSI drives. That means if one IDE/ST506/ESDI drive has already been
