TNL SN20-9843 (03-27-87) to 75X0152 or 75X0166When an additional device driver is needed, do the following:1. Remove the RT PC Diagnostic Diskette.2. Depending on the two-digit code, obtain the correct diskette containingthe device driver needed. Insert it into the diskette drive. The driverwill load without any additional action.3. Follow the instructions displayed or instructions with the device driverdiskette. If a flashing two-digit code displays, the diskette failed to load.See the information with the device driver.Loading the Diagnostic DisketteNote: Before loading the diagnostic programs, all other programs andoperating systems must be stopped to prevent loss of data.Do the following to load the diagnostic programs:1. Be sure that all programs or operating systems are stopped (get help ifneeded).2. Set the power switch on the system unit to Off. If attached, set thepower switch on the IBM 5085 to Off.3. If present, remove the write-protect tab from the diagnostic diskettes.4. Insert the Diagnostics 1 (DIAG-1) diskette in drive A and close thedrive.5. Set the keylock to Unlock.6. If the IBM 5085 is attached, be sure the System Diskette is in the IBM5085, then set the power switch to On.(3/87) Diagnostics 2-9