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DEC DECpc 433 User Manual

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Troubleshooting
Beep Codes
If
POST finds an
error
condition
and
cannot
display
a message,
the
system
board
speakd
emits a series of
beeps
to
ir.dicate
the
error
condition.
It
also
writes a
value
into
J/O
port
SOH
for
both
fatal
and
not-fatal errors.
No
value
is written
to
1/0
port
80H
for intelligent graphics
controller
error conditions.
Beep codes
are
either
fatal
and
not-fatal. Fatal
errors
prevent
the
system
from
booting. Non-fatal errors allow
the
system
to
attempt
a boot. For example, if
the
speaker
emits
a
2-1-4
beep
code
(a
burst
of two
beeps,
a single
beep,
and
a
burst
of
four
beeps),
bit
three
of
the
first
64
KB
of
DRAM
failed its
test
Table
2-3
lists
the
beep
codes for fatal errors
and
the
values
written
to
J/0
port
80H.
Table
2-4
lists
the
beep
codes for non-fatal errors
and
the
values
written
to
110
port80H.
Beep codes
for
the
intelligent graphics controller
are
different
in
that
only
long
and
short
beeps are emitted. It is
the
number
of
ea1:h
that
identifies
the
error
condition. Table
2-5
lists
the
intelligent
graphics
controller
beep
codes.
DECpc
433
Workstation Service
Guide
2-11

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DEC DECpc 433 Specifications

General IconGeneral
BrandDEC
ModelDECpc 433
CategoryDesktop
LanguageEnglish

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