IBM 8681 Hardware Maintenance Manual - Page 150
Table 14. Processor-controller board jumper, Processors listed in Table
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Processors listed in Table 14 are not necessarily available or planned for your model. If a processor becomes available for your model, use these switch settings. Table 14. Processor-controller board jumper Jumper name Description 3 The default core/bus fraction is 5.5 Processor-core-frequency-selectio(n550/100 MHz). Pins 9/10, 11/12, and 13/14 are closed. Pins 15/16 are open. For the core/bus fraction 6.0 (600/100 MHz), pins 9/10, 11/12, and 13/14 are open. Pins 15/16 are closed. For the core/bus fraction 6.5 (650/100 MHz), pins 9/10 and 15/16 are closed. Pins 11/12 and 13/14 are open. For the core/bus fraction 7.0 (700/100 MHz), pins 9/10 and 11/12 are open. Pins 13/14 and 15/16 are closed. For the core/bus fraction 7.5 (750/100 MHz), pins 9/10, 13/14, and 15/16 are closed. Pins 11/12 are open. Note: Open = No jumper is present. Closed = A jumper is present. 142 Netfinity Server HMM