9845B/C Environmental, Installation, and Preventive Maintenance Requirements 2-7 The Option ROM Drawers The 9845 has two ROM drawers which contain the ROMs. They are located on each side of the machine at the base of the dark stripe. The ROMs that belong in the left-hand drawer have green labels, and those that belong in the right-hand drawer have black labels. Since it is important that each ROM be inserted in the proper drawer, the drawers are designed to prevent inserting a ROM in the wrong drawer. I The labels on the drawers and the ROMs have symbols on them: a circle, square, or triangle. Use these symbols as a guide for matching ROMs to the appropriate slots.
· ° ROMs can go in ° or D slots. • D ROMs must go in D slots. ~ ROMs must go in ~ slots. Installing and Removing ROMs To insert a ROM: • Slide the drawer aU the way out and make sure the label color matches that of the ROM you want to insert. • Open the clear plastic cover by squeezing the sides of the cover to gain access to the connectors. • Orient the ROM so that the tops of the letters on the label are toward the computer. • Make sure that the shape (0, D or ~) on the ROM corresponds to the shape for the slot. • Insert the ROM verticaUy so that it goes aU the way to the bottom of the connector.
The smaU raised rib on the top of the drawer should fit into the recess on the bottom of the ROM. If it doesn't, make sure you have made the proper color, shape and orientation matches. • When the ROM is inserted, snap the clear cover shut and close the drawer until it is flush with the outside cover of the computer.