IBM SG24-4576-00 - Manual (Page 203)

Jumper Name: W10 - Level 2 Cache.
Default factory settings:
OFF ON
Change settings to:
OFF ON
+-----------+
| o
o---o |
+-----------+
1 2 3
This jumper along with W5 selects the level 2 cache size. Jumper pins
1-2 for 256K cache size.
Jumper pins 2-3 for 512K cache size.
Default is pins 2-3; 512K cache.
=======================================================================
Jumper Name: W20 - Monitor Type.
Default factory settings:
ON
Change settings to:
ON
+-------+
| o---o |
+-------+
1 2
This jumper will set the monitor type. The default, installed, is for
color monitors. Leave off the jumper for monochrome monitors.
=======================================================================
Jumper Name: W25 - ISA IDE IRQ.
Default factory settings:
OFF ON
Change settings to:
OFF ON
+-----------+
| o
o---o |
+-----------+
1 2 3
Jumper pins 1-2 to set the ISA IDE controller as the PRIMARY IDE
controller at IRQ 14. (The PCI IDE below must be disabled.) Jumpering
pins 2-3 will set the ISA IDE as the SECONDARY IDE controller at IRQ
15. (A primary IDE must be present first.)
=======================================================================
Appendix A. EISA Configuration File
191