ZBOQT
3.
Enter
the beginning address, followed by the
right—arrow key.
4.
Enter
the ending address, followed by the
right—arrow
key.
5.
Enter the
data
byte in hex, followed by the
right-arrow
key.
6
(Optional)
To
select an address step
other
than the
default
of
1
,press
the right- arrow key, followed by the step (up to 15)
7.
(Optional)
To
select a
functionother than
the default
of
fill (1),
press
the
right—arrow
key; then enter
2
for verify or
3
for
fill
then verify.
8.
Press ENTER to start the test.
3-25.
MARGINAL
UUT
PROBLEMS
3-26.
Introduction
The pod
is
designed to
approximate,
as
closely as possible, the actual
characteristics
of
the microprocessor
that
it replaces in the UUT. However, the
pod does differ
in
some respects.
In
general, these differences tend to make
marginal UUT problems more
Visible.
A UUT may operate marginally with the
actual
microprocessor installed, but tend to exhibit errors with the pod plugged
in.
The pod differences tend to make marginal UUT problems more obvious and
easier to
troubleshoot.
Different UUT and pod operating
conditions
that may
reveal marginal problems are described
in
the
paragraphsthat
follow.
3-27.
UUT
Operating Speed and
Memory
Access
UUTs designed
to
operate at speeds
that approach
the time limits
for
memory
access may
operate
marginally.
Inherent
delays present in the pod may result
in
the reporting
of
errors
in
memory.
3-28.
UUT
Noise
Levels
UUTs operate with
a
certain
amountof
noise, and as long
as
the noise
level is
low
enough,
it
does
not
affect normal operation. Removing the UUT
from
its
chassis
or case may
disturb
the integrity of the shielding to the
point
where intolerable
noise could exist. The pod may
introduceadditional
noise. In general, marginal
noise problems will actually be made worse (and easier to
troubleshoot)
through
use
of
the pod and mainframe.
3-29. Bus Loading
The pod loads the UUT slightly more
than
the UUT microprocessor. The pod
also presents more capacitance
than
the microprocessor. These effects tend to
make any bus drive problems more obvious.
3-19
Содержание 9000A-Z80QT
Страница 6: ......
Страница 14: ......
Страница 18: ...ZBOQT Figure 2 3 Connection 0 Interface Pod to UUT...
Страница 72: ......
Страница 76: ...Z8OQT MP10 H 2 9000A Z8OQT 5071 Figure 6 1 9000A 2800T Intertace Pod Final Assembly...
Страница 84: ...Z8OQT E 3 mwmdwwwwmi o a u n v u 2 as MLVLSI IQ 23333329...
Страница 85: ...ZBOQT QLVLSNXVI 9 Figure 7 1 A11 Processor PCB Assembly...
Страница 86: ...ZBOQT H H u Chum 55 ixu m3m V V v 0 A0 m v mmmcaa 5 5 taxman th XEH 35me 9 02 hww m4mm Nu W tho mu m uw m 7 4...
Страница 88: ...2800T 7 6 m V L LOl D INPUTS PAL U27 LOGIC Flgure 1 1 A11 Processor PCB Assembly cont OUTPUTS 15...
Страница 89: ...ZBOQT DEVICE 6ND PINS 14 Figure 7 1 A11 Processor PCB Assembly cont 7 7...
Страница 90: ...Z8OQT LA SELF HOLD LO BUSAK 7 8 C 2 5 5v 22A if 22L l clz Em 0531 00 463 EEF tzaF L _____________ _J...
Страница 92: ......
Страница 108: ......