IBM ThinkPad 770, Supplementary Manual

Page: 14 / 30

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.
8
Select OK in the warning dialog box. The system restarts.
If necessary, change the IRQ value assigned to PCI to 11.
The following table shows the relationship between the devices and
IRQ values:
Legend:
1. P-M: Primary-master
2. P-S: Primary-slave
3. S-M: Secondary-master
4. S-S: Secondary-slave
5. T-M: Third-master
6. T-S: Third-slave
Device 2-Channel
IDE
Default Mode 3-Channel
IDE Mode 2-Channel
IDE Mode
HDD IRQ 14, P-M IRQ 14, P-M IRQ 14, P-M
UltraBay II IRQ 15, S-M IRQ 15, S-M IRQ 14, P-S
Docking
station
Disabled IRQ 11, T-M
and T-S IRQ 15, S-M
and S-S
8
Title: C79DKMST CreationDate: 08/19/97 17:47:41