Commodore 2040 User Manual page 23

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STEP 5: Type: RUN.
This causes the DOS support program to be executed. (This program
is
not neces-
sary for the disk unit to operate, it just simplifies the direct mode commands.) A
brief introductory discussion of DOS Support is presented in Chapter 3 as it
applies to Chapter 3 operations. A detailed description of DOS Support is pre-
sented in Chapter 7.
STEP 6: Type: >D1=O
This commands the disk drive to make a backup copy of the DEMO diskette.
Remove the original DEMO disk from drive 0 and return it to its protective
envelope. Insert the backup disk into drive O.
STEP 7: Type: >10
This command initializes the backup diskette.
STEP 8: Type: LOAD"O:DIAGNOSTIC BOOT",8
This command loads the Diagnostic Boot program from the diskette in drive 0
into memory. The screen displays your entry and:
':,ERPCHItJC, FOP
[1
IiIRC,tJO':,TIC BOOT
LORIIItlCi
PERII'T' •
•
Concurrent with the display, the drive 0 indicator lights and the drive 0 motor
runs.
STEP 9: REMOVE THE BACKUP DISKE'ITE BEFORE PROCEEDING TO THE NEXT
STEP.
STEP 10: Type: RUN and press RETURN
Follow the directions on the screen. If all three indicators flicker continuously,
the test is passed. If all indicators remain lit in a steady pattern, the directions
on the screen can be used to find the problem area. Mter 30 seconds of opera-
tion, reset the disk drive by turning the computer's power switch OFF, then ON.
STEP 11: Simultaneously press SHIFT and CLR/HOME to clear the screen. Use the POKE
command described earlier to set the computer for upper case character entry.
STEP 12: RETURN THE BACKUP DISKE'ITE TO DRIVE 0
STEP 13: Type: >10
This command initializes the diskette in drive O.