TITLE
Apple III: System Failure Errors 

Article ID:16
Created: 9/21/84
Modified: 7/27/98
 

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TOPIC 
The following table attempts to explain the numbers that are displayed following 
a SYSTEM FAILURE.



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DISCUSSION 

A system failure is generally a hardware problem. Try recreating the same error 
with the same software on another Apple III to confirm if it is software or 
hardware that is causing the failure.

Copying certain protected diskettes will cause an error $06 when the copy is 
booted. This is a normal effect of the protection scheme.

$01 BADBRK Break instruction from within SOS
$02 BADINT1 Interrupting device not found
$03 BADINT2 Bad zero page allocation
$04 NMIHANG Unable to lock NMI
$05 EVQOVFL Event queue overflow
$06 STKOVFL 6502 stack overflow
$07 BADSYSCALL DMGR detected invalid request code
$08 MCTOVFLOW DMGR - too many device handlers
$09 MEM2SML Memory size less than 64K
$0A VCBERR BFMGR - volume control block not useable
$0B FCBERR File control block crashed
$0C ALCERR Allocation blocks invalid
$0D DIRERR Directory is not correct
$0E TOOLONG Pathname buffer overflow
$0F BADUFNUM Invalid buffer number
$010 BADBUFSIZ Invalid buffer size (=0 or >16K)

BFMGR Block file manager
DMGR Device Manager