Slots 1 through 3 are designed for 16-bit option cards and slot 4 is designed for an 8-bit card. As you can see below, a 16-bit card has an extra connector along the bottom.

16-bit option card

8-bit option card

Usually it does not matter which slot an option card occupies as long as the card fits in the slot. For example, you can place some 8-bit cards in a 16-bit slot. However, you must follow these guidelines when deciding which slot to use:

01An 8-bit card with an additional tab along the bottom must go into an 8-bit slot.

DIf you install a disk drive controller card, place the card as close as possible to the drive it is controlling.

0Some option cards must be installed in a specific slot. Consult the instructions that come with the card to see if this is the case.

Installing and Removing Options 5-13