Sharp mz-3500 Manual For Use page 161

Section A:
System interface
A.lG. System Errors
All system calls which access disks may cause errors. These errors are
subdivided into logical and physical errors. Contrary to physical er-
rors, the reason of logical errors is erroneous behavior of the program
or the system.
A
typical logical error were an attempt to read data past
the end of a file.
Logical errors are returned in register A. Following values are
possible:
If a
fied,
like:
or
1 = Missing data. This error can occur only when reading a disk
file, namely, if one attempts to read past the end of the file
or within a gap produced by random write operations. Further-
more, on sequential writes, the error denotes that the direct-
ory is full.
2
Disk is full. Can occur only with write operations.
3
An error was encountered when changing the current extent. In
general, this error will occur only when the directory struc-
ture is destroyed.
4
Attempt to
with random
of logical
position to non-existing extent.
read operations. Essentially, this
error
1.
Can occur only
is an extension
5 Directory full. It is not possible to establish another ex-
tent.
6
The random block number specified exceeds the upper limit
(currently, 65535). This error can also occur on an attempt to
create a file larger than 8 Megabytes.
physical error is encountered and normal error handling is
an error message is displayed on the screen. This message
EOS system error in function #n, file d:nnnnnnnn.eee
(message)
EOS system error in function #n, drive d:
(message)
speci-
looks
where n denotes the system function number which lead to the error,
nnnnnnnn.eee is the file affected. The error messages themselves
like this:
and
read
EOS System manual Daeumling & Zimmermann
Page 24