r
Copyright 1985,
Hewlett-Packard
Company.
All
Rights
Reserved.
BOOTROM
Rev.
A
MC68020
Processor
MC68881
Coprocessor
Bit
Mapped
Display
Keyboard
Failed
HP-IB
HP98642
at
9
Failed
HP98629
at
20
Memory
Failed
at
FFFC5932
(W:BBBB4444,
R:BBBB4464)
196448 Bytes
WAITING
1
MINUTE
(RETURN
To
Abort Wait)
~
RESET
To
Power-Up
Figure
4-5.
Example
Screen Display
With
Multiple Power-up Self-Test
Errors:
Memory
Tests
Word (16 bit) wide
tests
are executed on main memory.
There
are two
types
of
word wide
tests
used. Tests
on
the
upper
16K bytes
and
all peripherals always use
the
slower, walking ones
and
zeros,
test.
The
rest of
main
memory may use
either
the
slow
test,
or
a faster "address in
mernory" test.
Byte
(8
bit)
wide
tests
use
the
walking
ones/zeros
test.
This
test
is
used
on
any peripheral
that
has less
than
full word wide mernory (e.g.
alpha
display controller memory,
and
some graphics
mernory).
The
same messages are used for
reporting
all nlemory failures,
but
they
are
interpreted
slightly
differently for word
and
byte
memory tests.
Boot Rom Functions
91
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