Tekram Technology DC-820B manual Case

EISA Fast SCSI Caching Adapter

Device		Case 0	Case 1	Case 2
IDE HDD 0		none	drive C:	drive C:
IDE HDD 1		none	none	drive D:
SCSI device 0	(SCSI	drive C:	drive D:	(*)
ID = 0)
SCSI device 1	(SCSI	drive D:	(*)	(*)
ID = 1)

*: Not recognized by BIOS INT 13H, if existing. Can only be controlled by device driver.

Case0: No IDE drive exists. You must set the SCSI ID as 0 for bootable drive and 1 for the other.

Case1: The IDE drive is recognized as drive C:. And you must set the SCSI ID as 0 for this SCSI drive (D:).

Case2: No more SCSI device can be controlled by BIOS INT 13H.

2)Enabled

This option can only be enabled for MS-DOS 3.3/4.0/5.0 and NetWare duplexing environments. Do not activate it under other operating systems. Under DOS 5.0, you are able to control up to eight devices controlled by BIOS INT 13H, such as IDE/ESDI/ST506/SCSI fixed disk, removable car- tridge, and re-writable optical disk (MO). As for the DOS 3.3/4.0, you can only control up to two drives. This option occupies 1KB of conventional memory space as the scratch-pad memory, i.e., 639KB-640KB. Also, this option may cause some virus-protection software or hardware to issue a

false alarm.

To set this option as Enabled you are able to coexist with an Adaptec SCSI adapter, but you have to leave 330H for Adaptec’s adapter and switch the DC-820B’s I/O port to some other address. Aside from this, you have to add the necessary device driver(s).

The following is an example under MS-DOS 5.0 with the option enabled: To simplify the example, each device is defined as having only one DOS partition, i.e., two devices for drives C:/D:, four devices for drives C:/D:/E:/

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