ZiLOG Z80-RIO Operating System User's Manual page 138

Following is a list of error codes with their meaning.
They will be discussed in detail under the description of
each operation with which they can occur.
CODE
(Base 16 )
Cl
C2
C3
C4
C5
C6
C7
C8
C9
CA
CB
CC
CD
CE
CF
DO
Dl
D2
D3
D4
D5
D6
D7
D8
D9
DA
MEANING
Invalid operation
Not ready
Protection
Sector error
Seek error
Data transfer area
File not found
End of file error
Pointer check error
File not open
unit already active
Assign buffer full
Invalid disk drive
Logical unit table full
Duplicate file
Diskette ID error
Invalid attributes
Disk full
File not in proper
directory record
Beginning of file error
File already open (on
another unit)
Invalid rename
File locked (attempt to
change attributes)
Invalid open request
Insufficient memory for
allocation maps
The following are warning codes. They do not have bit 6
(the error bit) set, and do not cause transfer to the error
return address.
81
82
83
84
Directory format error
Scratch file created
File name truncated
Attribute list truncated
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