Asus PCI-SC200 User Guide - Page 2

ASUS SCSI Cards Jumper Settings R PCI SCSI Cards Setting Up the ASUS PCI-SC200 & PCI-SC860 There are two jumper settings you may need to make on the ASUS PCI-SC200. 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. 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. JP 1 JP 2 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 Interrupt Settings (A, B, C, or D) 1 2 3 INT 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