The first item on the main CMOS menu will be "Standard" settings, and should be highlighted when you enter the CMOS setting program.
Press Enter to get into the standard settings. The only thing you should have to deal with in that menu is the settings for floppy drive a: (and b:, if you have 2 floppies).
Arrow down to highlight the item you want to change, then use the PgUp key (usually labeled COOLANT on Omniturn keyboards) to step through the options until each of them is set to 1.44 meg, 3-1/2".
If you only have 1 floppy disk drive, drive b: should be "none" or "not installed".
You may also set the date and time in this menu if you care about the timestamps on your files.
There should be a setting for your hard drive, too. If this says "None" or "Not Installed" but you do have one,you'll have to autodetect the hard drive. You do this in a different menu.
When you've got things all set in this menu, press Esc to get back to the main CMOS menu.
If the Standard settings screen showed no hard drive but the control has one, use the down arrow key to highlight the item for Auto-detecting the hard drive. For some CMOS it's IDE auto detect, for others it's HDD autodetect; it always says something about detecting the hard drive.
Press Enter and the screen for the Primary Master hard drive will come up. It may present you with more than one option for hard drives. Sometimes they have choices with a mode parameter of "LBA" along with one or two other mode options.
Pick the number of a non-LBA alternative. You will then be shown values for Primary Slave drive (should be all 0's). Press Enter to skip it, and likewise for the Secondary Master and Slave options, if it shows them. When you've finished the Auto-detect, you'll need to go to BIOS features or Advanced Settings.
The second item on the main CMOS menu will be either "Advanced" or "BIOS features" settings. Use the up or down arrow key to highlight this item and press Enter, and the new menu should come up.
Somewhere near the top of this list will be settings for Internal and External CPU caches. The default setting for both of those is Enabled, but for most motherboards, the machine ran best with them both disabled. Apparently the best setting to match the motherboards with the motion control card can change over time, though, so you may want to try different combinations if you run into problems with programs hanging up. Sometimes people have gone through all four combinations of Internal and External caches enabled and disabled to find the best combination.
To change the settings, arrow up or down to highlight the item you want to change and then press the PgUp (coolant) key to switch its status. Most likely the best setting will be both caches disabled.
There will also be a setting for "Boot Sequence": This should start with C,A, if you have a hard drive or A,C, if you have no hard drive.
NumLock status at bootup should be OFF.
Once you've got the settings the way you want them, press Esc to get out of the Advanced settings page and back to the main CMOS menu.
At the main CMOS menu press the F10 key. You'll be asked if you want to save the changes and exit. Press Y and Enter.
The system should now boot with your new settings.