Tekram Technology DC-820B manual 1MB 4MB

EISA Fast SCSI Caching Adapter

Cache Size	1MB	4MB	16MB
DOS/Windows	4KB/line	16KB/line	16KB/line
NetWare	4KB/line	16KB/line	16KB/line
UNIX	4KB/line	8KB/line	16KB/line

Cache DRAM test: Suppressed/Simplified/Full test. Suppressed test is the default option and would just skip the test on cache DRAM to save time for system boot-up. Full test on cache DRAM includes regular pattern, random pattern, and address pattern tests. Choosing the Simplified test option would only activate the regular pattern test.

Host Adapter SCSI ID: 0-7. The default ID of DC-820B is 7. Each device, including the DC-820B, must have its own individual SCSI ID. If any conflict occurs, check the device menu for proper ID setting.

DOS 5 Support enable / disable: Under DOS environments, the devices connected to the DC-820B can be controlled through BIOS INT 13H or device drivers. There are some limitations for devices serviced by BIOS INT 13H, such as the I/O port has to be set as 330H and the SCSI ID must start from 0. This option enables you to overcome the above limitations. Two options available are as follows:

1). Disabled (default)

When this option is chosen, you can only handle two drives through BIOS INT 13H. Be sure that the SCSI IDs of these two drives must start from 0 and make sure to set 330H as your I/O port address. All other SCSI devices, such as fixed disk (more than two), removable cartridge, re-writable optical disk (MO), tape streamer, DAT, and CD-ROM, should be controlled by device drivers.

When devices are under the control of BIOS INT 13H, IDE drives always have higher priorities over SCSI drives. The following is an example describ- ing all the combinations:

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