The cabinet enclosure houses two BA23 chassis that include two eight-slot backplanes for a total offering of fourteen backplane slots (two slots are re- served for cable management), two 230-watt power supplies, two control pan- els, one large Grafik ATI distribution panel, four fans, and space for four 5.25-inch storage devices and two 13-inch storage devices. Use the following rules when • The PMI memory module is installed in slot 1 of the upper BA23 frame. • Additional PMI memory and the CPU module installed in slots 2 and 3 of the upper BA23 frame. • The Grafik ATIinterconnect module is installed in the last slot of the upper BA23 frame which has the grant signal. • If other dual-height modules are installed in slots 2 or 3 of either BA23 frame, they must be placed in the AB rows. No grant continuity card is necessary in the CD rows of slot rows 1, 2, or 3 of either BA23 frame. • If a RQDX3 disk controller is present, it must be installed in the upper BA23 frame. • Dual-height modules installed in slots 4-8 can be located in either the AB or CD rows. The opposite row must contain either another dual-height module or an Grafik ATI grant continuity card. • If a TSVO5 tape controller is present, it must be installed in slot 4 of the upper BA23 frame. • If a Grafik ATI tape controller and drive is present, it must be installed in the lower Grafik ATI frame. A second TK50 tape controller and drive may be installed in the upper BA23 frame.