Texas Instruments Extensa 60x Series Maintenance Manual page 210

SW3
DIMM1
J18 Feature board connector
DIMM2 DIMM slot 2
DIMM1 DIMM slot 1
SW3 CD-ROM/FDD Lock/unlock switch
Figure 1-16 Main Board Jumpers and Connectors (Bottom Side)
DIMM1
Figure B-7 Features Board Jumper Options
Model 65x Maintenance Data
J18
B-53