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ERROR MESSAGES
EI
28. 1 -- Diskette Controller Errors
The
version
and
revision
0;
MDOS
. already loaded into memory is net the
same as that on diskette.
This
error
usually
occurs
as
the
result
of
switching
diskettes
in
drive
zero
without
following the
initializ~tion
pro c e
d
u reo u t
1
in e d i n
sec
t
ion
2.
1.
This
error
can also occur is the
ID
sector has been damaged.
The
error
can
be
avoided
if
the
initialization
procedure is followed
correctly every
time
a
ne~
system
diskette
is
inserted into drive zero.
ER
The addresses of the RIBs of the MDOS
overlays are not the same as those at
the
time of the last initialization.
This error may
occur
ror
the
same
reasons as the "EI" error.
EU
An
input/output
s~5tem
function
returned
an
error
during
the
initialization.
Errors of this sort
indic~te
a possible memory problem or
the opening of
the
door to drive zero
while
the
initialization
is
taking
place.
EV
One of the system files is missing or
cannot be loaded into memory.
If
a
s y stem
f i
1
e ism iss in
9
I
the dis
k
e t t
e
has been improperly generated or
the
file was intentionally deleted.
IT a
rile
cannot
be
loaded,
then
the
diskette
should be regenerated.
The
diskette may be used in drive one
to
save
any
files
that
may
be on it
(section
2.8.9),
This error may also
occur
if
the
door to drive zero is
opened
while
initialization
is
in
progress.
28.1.2
Errors after initialization
If
a
diskette
controller error is detected after MDOS
has been initialized,
then an error message of the
following
format will be displayed.
**PROM I/O ERROR--STATU8=nn AT h DRIVE i-PSN
J
This
message
indicates that an unrecoverable error occurred
while trying to access the diskette.
The error
status
"nn"
Page
28-05
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