Lenovo ThinkPad 600 User's Reference Guide for TP 600 - Page 100
Setting to 3-Channel IDE Mode, ThinkPad Configuration, Docking Station, IRQ Holder for PCI Steering
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Title: C79EGMST CreationDate: 02/10/98 09:24:42 Using a Docking Station Setting to 3-Channel IDE Mode 1 Open the ThinkPad Configuration program. 2 Click on the Docking Station ( ) button. 3 Change the IRQ value in IRQ Holder for PCI Steering to a value other than IRQ 11 or 15 (IRQ 9 is recommended). 4 Select Enable IDE devices. 5 Select Third channel(IRQ 11, I/O 1E0) in the IDE channel selection list box. 6 Click on OK to close the dialog box. 7 Select OK in the warning dialog box. The system restarts. Setting to 2-Channel IDE Mode 1 Open the ThinkPad Configuration program. 2 Click on the Docking Station ( ) button. 3 Change the IRQ value in IRQ Holder for PCI Steering to a value other than IRQ 11. 4 Select Enable IDE devices. The third IDE is automatically selected. 5 Select Secondary channel in the IDE channel selection list box. 6 Click on Disable Device in the warning message dialog box. 7 Click on OK to close the dialog box. 82 IBM ThinkPad 600 User's Reference