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Xerox 560 Reference Manual

Xerox 560
206 pages
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at
its normal
rate
(e.
g.,
fixed
duration
control
sequences
may not
take
effect
and
diagnostic
control commands
which
operate
upon
BP's
registers or memory
locations
require
a
large
numberof
clock
steps
to
complete
the
operation).
The
RESET
SYSTEM,
RESET
I/O,
and
RESET
BASIC
PROCESSOR commands
are
effective
in
Single
Clock
Mode.
When the·Single
Clock
Mode is
set,
the
contents
of
the
currently
selected
Single
Clock
Status Register
are
displayed
(see SELECT/DISPLAY
SINGLE CLOCK
STATUS
REGISTER,
ZCE## command).
If
the
computer system is
currently
in
the
Single
Clock
Mode,
ZCCLK
command resets
the
two-digit
clock
step
counter
to
X'OO'.
The
Single
Clock
Mode may
be
reset
by
either
a
CLEAR
SINGLE CLOCK MODE, ZCKIL, command or a
SUPER
RESET,
Z
C
MM4, command.
Note:
Entering a
SET
SINGLE CLOCK MODE command
when
the
basic
processor
is
performing normal
data
pro-
cessing
operations
may
have
an
adverse
effect
upon
I/o
operations.
To
prevent
inadvertent
entry
into
Single
Clock
Mode,
the
ZCCLK command is
not
ac-
cepted
unless
the
MAINT MODE switch is
in
the
ON
position. Attempting
to
enter
a ZCCLK command
when
the
MAINT MODE switch is in
the
OFF
posi-
tion
results in
an
error
message (*EVENT A2*)
being
displayed
and
no
further
acti
on.
16
SINGLE-CLOCK
STEP
",I
.1
•
...1
~.
I I
ll.
I • I
YVrll::lI
rill::
:)y!)rl::lII
I!)
III
HII::
.J"I~II::
\..IOCK.
IYlOUl::,
U
!)"~II::
space
character
(depicted
as
!t5
within
this
text),
without
a
control-Z,
is
interpreted
as a
SINGLE-CLOCK
STEP
command. For
each
space
character
received
from
the
con-
trol
console,
the
current
command or
instruction
is
partially
executed
(one c1ock
'
s worth of
execution
for
each
space
character)
.
The
contents
of
the
currently
selected
Single
Clock
Status
Register
are
displayed
and
the
clock
step
counter
is
incre-
mented by + 1 for
each
SINGLE-CLOCK
STEP.
zCC##
MULTIPLE-CLOCK
STEP
When
thesystemisintheSingle
Clock
Mode,
the
MULTIPLE-
CLOCK
STEP
command
causes
the
current
instruction
or
com-
mand
to
be
executed
for 1
to
256
clock
steps (as
specified
by
the
two
hexadecimal
digits
11##
..
in this command). The
ZCOO
command
causes
256
clocks
to
be
issued. The
contents
of
the
currently
selected
Single
Clock
Status Register
are
displayed.
The
clock
step
counter
is
incremented
by
the
number
of
clock
steps
specified
by
this
command.
The
MULTIPLE-CLOCK
STEP
command
allows
precise
step-
ping
to
a
specific
point
in a micro-program
sequence
in-
volving a
large
number of
clock
steps.
SELECT/DISPLAY SINGLE CLOCK
STATUS
REGISTER
This command
causes
the
requested
SCSR
to
be
displayed.
The
Ir##lr
portion
of
this
command (two
hexadecimal
digits)
is stored
within
the
ECS
and used
as
a
reference
address in
any command
which
displays
the
contents
of
the
currently
selected
Single
Clock
Status Register. The first
hexa-
decimal
digit
is
the
cluster
address
and
the
second
digit
is
the
el
ement
address.
In
addition
to
being
modified by subsequent
Zc
E##
com-
mands,
the
cluster
and
element
addresses may
also
be
changed
by
the
LOAD NORMAL command
and
the
SET
CLUSTER
DISPLAY MODE command. The LOAD NORMAL
command sets
the
address
to
XIOO'
and
the
SET
CLUSTER
DISPLAY MODE command
causes
the
element
address
to
be
set
to
a
zero
following
each
cluster
scan.
Zct<IL
CLEAR
SINGLE CLOCK MODE
When
this
command is
entered,
the
system
clocks
are
re-
started
immediately.
The ZCKIL command may
be
issued
at
any
time.
If
the
system is
not
in
the
Single
Clock
Mode,
the
ZCKIL command is
ignored.
z'\1MO
CLEAR
MM
FEATURES
Upon
completion
of
maintenance
operations,
the
CLEAR
1.1~A
.......
T'lln
..
t'"
__
. _
••
1/.
.11
..•.
1..
t'"llnl':'n
nl':'t'"["'T'
...
IYIIYI
rLMI
UI'l.L.J
\,;UlIIIIIUIIU
\U!)
VVI::II
U!)
1111::
.JU"-
LI'I.
I'I.L.JL
I
\';UlII-
mand,
described
below) may be used
to
restore
the
system
to
a
standard
configurati
on status. The
CLEAR
MM
FEATURES
command
does
the
following:
1.
Restores
the
system
clock
to
its
normal
frequency.
2.
Clears
the
"Repeat
Clocking
Mode" (see
ZC
MM1
command).
3.
Clears
the
"Cluster
Display Mode" (see
ZC
MM2
command).
4.
c
Clears
the
II
P-Mode
Repeat Mode" (see Z MM3
command).
5.
Clears
the
II
Micro-diagnostic
Repeat Mode" (see
Z
C
MM5 command).
6.
C I ears
the
II
Overri
de
Interl
eave
Mode" (see
ZC
MM9
command).
7.
Clears
the
II
Display
Inhibit
Modell (see
ZC
MMA
command).
Note
that
the
CLEAR
MM
FEATURES
command does not
generate
any
resets (ZCRIO, ZCRSY, or
ZCRBP),
does not
clear
P-Mode,
nor does
it
clear
Single
Clock
Mode (see
ZCCLK
and
ZCKIL commands).
Control Commands 159

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Xerox 560 Specifications

General IconGeneral
Print Resolution2400 x 2400 dpi
Monthly Duty CycleUp to 300, 000 pages
Duplex PrintingStandard
Operating System CompatibilityWindows, Mac OS, Linux
ConnectivityEthernet, USB
Paper SizeUp to 13 x 19.2 inches
TypeMultifunction Printer

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