User manual ASUS SC200

[. . . ] E281 R PCI SCSI Cards ASUS SCSI Cards SCSI BIOS 1 Symbios SCSI BIOS and Drivers Aside from the system BIOS, the Flash memory chip on the motherboard also contains the Symbios SCSI BIOS. This Symbios SCSI BIOS works in conjunction with the optional ASUS PCI-SC200 controller card to provide Fast SCSI-2 (up to 10MB/ Sec) interface when using compatible Fast SCSI-2 devices or the ASUS PCI-SC860 SCSI controller cards to provide Ultra-Fast SCSI-2 (up to 20MB/Sec) interface when using Ultra-Fast SCSI-2 devices. All SCSI devices you install on your system require driver software to function. [. . . ] One setting assigns the PCI interrupt, the other sets the card's termination. The ASUS PCI-SC860 has no jumper settings but you should read the "Terminator Requirements" for SCSI connection information. JP 1 JP 2 JP 1 JP 2 JP 1 JP 2 1 2 3 INT A (Default) 1 2 3 INT B 1 2 3 INT C 1 2 3 INT D Interrupt Settings (A, B, C, or D) Terminator Requirements for SCSI Devices SCSI devices are connected together in a "chain" by SCSI cables. Internal devices connect to the ASUS PCI-SC200 or ASUS PCI-SC860 with a fifty-pin flat ribbon cable. External devices connect to the external port with a SCSI-2 cable. If there are more than one internal or external devices, additional devices are connected with cables to form a "daisy chain. " Terminating the devices on the ends of the SCSI Bus "chain" is necessary for SCSI devices to work properly. Termination of the devices between the ends must be Disabled. Terminator Settings for the ASUS PCI-SC860 Many SCSI devices including the ASUS PCI-SC860 use a set of onboard active resistors to terminate the devices at the ends automatically. Automatic termination requires that the SCSI devices be connected in a straight linear connection or "chain. " Connect SCSI devices to one or two of the SCSI connectors in a linear "chain" for auto termination of the ASUS PCI-SC860 to be effective. Other formations will cause your SCSI devices to not mount properly. You must use the end of the ribbon cable when using the internal connector(s) to keep a linear path. 2 ASUS SC200/SC860 Reference Guide JP 1 JP 2 ASUS SCSI Cards Jumper Settings Setting the PCI Interrupt for the ASUS PCI-SC200 You must use PCI INT A setting in order to properly assign the ASUS PCI-SC200's interrupt. On the ASUS PCI-SC200, you assign the INT by setting jumper JP1 or JP2. The default setting for the card already is INT A, so you do not need to change the setting to use the ASUS PCI-SC200 with ASUS motherboards. R PCI SCSI Cards ASUS SCSI Cards Jumpers Settings 3 Terminator Settings for the ASUS PCI-SC200 The ASUS PCI-SC200, on the other hand, has "passive" termination that you must set using jumper JP5. There are two settings, "terminated" and "not terminated, " as shown below. JP 5 Terminated (Default) Not Terminated Terminator Setting (Terminated / Not Terminated) Decide whether or not you need to terminate the ASUS PCI-SC200 based on its position in the SCSI chain. Only the devices at each end of the chain need to be terminated. [. . . ] Follow the boot menu for instructions on entering the utility. IMPORTANT: The Symbios Logic SCSI Configuration Utility is a powerful tool. If, while using it, you somehow disable all your controllers or cannot enter the configuration utility, pressing "Ctrl-A" after memory count during reboot allows you to enter the configuration utility for reconfiguration. Copyright © 1998 ASUSTeK Computer Inc. [. . . ]