Device Not Present; Load And Status Errors; Read Error - Commodore 8000 Series User Manual

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While the computer has many error and diagnostic messages, we will specifically examine
these thirteen errors-their causes and cures-because they are the ones most frequently en·
countered when using the LOAD, RUN, and SAVE commands.
ERRORS ENCOUNTERED
WHILE TRYING TO LOAD A PROGRAM
Device Not Present
This error message means that the computer has tried to communicate with an IEEE-488
device that either is not attached to the computer or is not turned on. To correct the error,
attach the appropriate device to the computer IEEE-488 port and turn it on. Be sure that
the cables are connected properly. Exercise caution here: you must first remove any
diskettes from the 2040 Dual Disk Drive before turning power OFF or ON. Take care to
ensure that the device number of the device being addressed corresponds to that device.
That is, don't attempt to address the printer as device number eight when it is actually
device number four. (8 for disk, 2 for second cassette, 4 for printer)
Load And Status Errors
If a fatal error occurs while loading a program from tape, this message appears on the screen:
?load error
This means that the computer could not load the program after repeated tries and has quit
trying. Rewind the tape and reload the program. Make sure you are searching for a program
that actually is on the tape you are using. Tapes can sometimes be aligned by running the
whole tape through on FAST FORWARD.
Marginal load errors, which do not cause complete failure to load, can be determined by
checking status-type PRINT ST followed by RETURN. If S'f::oO then the program has not
loaded correctly.
Read Error
*
*This is a disk error, signalled by the red light between the disk drives. Obtain the error
message by typing: PRINT DS$ followed by a RETURN.
This error means that the disk controller is unable to read the requested file from the disk.
If this occurs upon loading a program into computer memory, re-initialize the disk and
repeat your loading procedures. If this error message persists, your disk may have become
unreadable due to physical damage, exposure to magnetic fields, or some other cause. If a
read error is encountered on a large proportion of disks, or on one drive and not the other,
contact your Commodore distributor since this error may indicate a hardware-related
problem.
NOTE: If you attempt to read either a:
• 2040 disk with an 8050 disk drive or an
• 8050 disk with a 2040 disk drive,
A READ ERROR WILL RESULT.