Xerox WORKCENTRE 7120 User manual

Xerox Card Readers
Models712017121/712217140
Reference Manual
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Code
(Hexadecimal)
02
06
12
16
32
36
OA
OE
lA
IE
3A
3E
CARD READER ORDER CODES
Function
Read Binary
Read
Automatic
Read Binary
Read
Automatic
Read Binary
Read Automatic
Read Binary
Read Automatic
Read Binary
Read
Automatic
Read Binary
Read
Automatic
Model 7120
Normal stacker
Normal stacker
AI ternate stacker
Alternate stacker
Stacki ng Action t
A
Iternate stacker 2
Alternate stacker 2
If no data overrun occurs, stack
card in normal stacker; if data
overrun occurs, stack card in
alternate stacker 2.
If neither data overrun nor
validity error occurs, stack
card in normal stacker; if data
overrun or validity error occurs,
stack card in 01 ternate stacker 2.
If no data overrun occurs, stack
card in alternate stacker 1; if
data overrun occurs, stack card
in alternate stacker 2.
If neither data overrun nor
val idity error occurs, stack
card ina I ternate stacker 1; if
data overrun or validity error
occurs, stack card in alternate
stacker 2.
Alternate stacker 2
AI ternate stacker 2
Model 7140
Normal stacker
Normal stacker
AI ternate stacker
AI ternate stacker
Normal stacker
Normal stacker
If neither data overrun nor read
verify error occurs, stack card
in normal stacker; if error occurs,
stack card in alternate stacker.
If neither data overrun, validity,
nor read verify error occurs,
occurs,
stack card in normal
stacker; if data overrun, validity,
or read verify error occurs, stack
card in alternate stacker.
Al1 ternate stacker
AI ternate stacker
Same as 'OA'
Same as 'OE'
t Models 712117122 accept all the above order codes but offer no alternative stacki ng si nce they have one stacker.
;.
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Xerox Corporation
~, 701 South Aviation Boulevard
EI Segundo, California 90245
213 679-4511
Xerox Card Readers
Models 7120/7121/7122/7140
Reference Manual
90 09 70E
November 1970
Price: $1.00
XEROX
Printed in U.S.A.
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ii
REVISION
This publication, 9009 70E, is a revision of the Xerox Sigma Card Readers Reference Manual, 9009 70D (dated
May, 1970). A change in text
from that in the previous manual is indicated by a vertical line in the margin of the
affected page.
RELATED PUBLICATIONS
Title
Xerox 530 Computer/Reference Manual
Xerox Sigma 2 Computer/Reference Manual
Xerox Sigma 3 Computer/Reference Manual
Xerox Sigma 5 Computer/Reference Manual
Xerox Sigma 6 Computer/Reference
Manual.
Xerox Sigma 7 Computer/Reference Manual
Xerox Sigma 8 Computer/Reference Manual
Xerox Sigma 9 Computer/Reference Manual
Xerox Meta-Symbol/LN, 0
PS Reference ManuaI (S igma 5-9)
Xerox Symbol/LN, OPS Reference Manual (Sigma 5-9)
Xerox Macro-Symbol/LN,OPS Reference Manual (Sigma
5-9)
Xerox Symbol/LN,OPS Reference Manual (Xerox 530 and Sigma 2/3)
Xerox Extended Symbol/LN,OPS Reference ManuaI (Xerox 530 and Sigma 2/3)
Publ ication No.
90 1960
900964
90 1592
900959
901713
900950
90 1749
90 1733
900952
90 1790
90 1578
90 1051
901052
Manual Content Codes: BP -batch processing, LN -language, OPS -operations, RBP -remote batch processing,
RT - real-time, SM -system management, TS -time-sharing, UT -utilities.
ALL SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
~"
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CONTENTS
~,
1. GENERAL DESCRIPTION
Card File Unloading Procedure
(Models 7121/7122) 19
Introduction
Reader Ha I ted
19
Reader Running 19
2.
FUNCTIONAL DESCRIPTION 2
Card File Loading Procedure (Model 7140) 19
Reader Halted
19
Data Representation
2 Reader Running 19
EBCDIC Card Format
2
Card File Unloading Procedure (Model 7140) __ 19
Binary Card Format 2 Reader
Halted
19
Card Reader States
3 Reader
Runn ing 19
Operational States
3
Conditions
3
APPENDIXES
Modes 3
Transi tions Between States
3
A.
XEROX EBCDIC CARD CODES 20
Data Transfer 3
B.
PROGRAMMING EXAMPLES 22
3. PROGRAM INTERFACE 5 Sigma
5-9 Programming Example 22
Read Orders 5
Xerox 530 and Sigma 2/3 Programming Example_ 23
Read Card Binary 5
Read Card Automatic 6
ILLUSTRATIONS
Key Events 6
Start Input/Output
6
Model 7120 Card Reader, Model 7140 Card
Unusual End
Conditions
6 Reader, Model 7121/7122 Card Reader iv
Channel End CondiHons
6
Error Conditions
7 1. EBCDIC Read
Operation
2
Incorrect Length 7
2.
Binary Read Operation
2
Invalid EBCDIC Punches 7
Data Overrun
7 3. Controll ing
System/Card Reader Actions
11
Read Verify (Model 7140-02) 7
4.
Card Reader Event Times (Model 7120) 12
Not Operational Conditions
7
Card Reader Status Response 7
5.
Card Reader Event Times (Model 7121)
13
I/O Instruction Status Bits 7
6.
Card Reader Event Times (Model 7122) 14
Device Status Byte 7
Operational Status Byte 9
7.
Card Reader Event Times (Model 7140)
15
Programming Considerations
9
8.
Model 7120 Card Reader Control Panel
16
Sequence of Activity
9
Timing Information 9
9.
Models 7121/7122 Card Reader Control Panel
__ 16
10.
Model 7140 Card Reader Control Panel
17
4.
OPERA liONS
16
11.
Model 7120 Input Hopper
18
Introduction
16
12.
Model 7120 Mul tiple Output Stackers
18
Operator Controls (Model 7120)
16
OPER'L/POWER
16
13.
Models 7121/7122 Input Hopper and Output
START
16
Stacker
18
FAULTjRESET
16
14.
Model 7140 Input Hopper and Output Stackers __ 19
STOP
16
Operator Controls (Models 7121/7122/7140)_- 16
TABLES
POWER
16
START
16
STOP 17 1.
Characteristics
1
FEED/READ 17
2.
Card Reader State Transitions 4
RESET
17
3.
Binary Mode Stacking Action
5
HOPPER/STACKER 17
4.
Automatic Mode Stacking Action
6
-~,
Card File Loading Procedure (Model 7120) 17 5.
Card Reader I/O Instruction Execu'Hon Response_
8
Card File Unloading Procedure (Model 7120) __ 18
6.
Device Status Response for SIO, TIO, and HIO_
9
Card File Loading Procedure (Models 7121/7122)_ 18
7.
Device Status Response for TDY
9
Reader Halted
18
8.
Devi ce Status Response for AIO
10
Reader Runn ing
18
9.
Operational Status Byte 10
iii
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Model 7120 Card Reader
Model 7140 Card Reader
Model 712117122 Card Reader
iv
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1. GENERAL DESCRIPTION
INTRODUCTION
Xerox Models 7120/7121/7122/7140 Card Readers are
capable of reading standard 80-'column tabulating cards
conforming to the Electronic Industries Association (EIA)
punched card standard RS-292.
Cards
are read serially, column by column, in either of
two
read modes: binary (absolute) or automatic (EBCDIC).
Automatic read mode switching, from
EBCDIC to binary,
facilitates reading of intermixed EBCDIC- and binary-
punched cards.
The
photoelectric read station reads each 12-bit column of
an 80-column card. The data thus sensed are presented to
the controlling system as a series
of 8-bit bytes.
Transport
check and read check faci Iities provide for detec-
tion of "not operational" conditions by the controlling sys-
tem. Empty input hopper and full output
stacker conditions
are also signaled to the controlling system.
Table 1. Characteristics
Operati ng Characteristi cs
Model 7120 Models 7121/7122 Model 7140
Readi ng speed 400 cards/minute 400 cards/minute (7122) 1500 cards/minute
200 cards/minute (7121)
Hopper
capacity 1200 cards 1200 cards 2500 cards
Stacker capacity
1000 cards/stacker
1000 cards 2000
cards/stacker
Number of stackers 3 1 2
Physical Dimensions
Height
24 in.
17 in.
40 in.
Width 32 in.
21 in.
37.5 in.
Depth 25
in.
31.5 in. 33
in.
Weight (approximately)
450 Ib
200lb
350lb
Recommended access area
3 ft on all sides 3 ft on
all sides 3 ft on
all sides
Environmental Characteristics
Power Requirements 120
vac,
120 vac, 120
vac,
60 Hz, si ng Ie-phase,
60 Hz, single-phase
60 Hz, single-phase,
2 amps 8 amps
16 amps
Operati ng temperature
60
0F to 900F
60
0F
to 900F
60°F to 900F
Operating humidity (relative) 25% to 80% 25% to
80%
25% to 80%
General Description
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2. FUNCTIONAL DESCRIPTION
DATA REPRESENTATION
A single 80-column card can contain data in either of two
formats: EBCDIC
or binary.
EBCDIC CARD FORMAT
In the EBCDIC card format there are 256 valid punch con-
figurations for a single card column (see Appendix A), each
of which is translated into an 8-bit code in the range 0-
2551Q(0016-FF16). Thus, the EBCDIC card image (i.e.,
the 80 columns of punch configurations) consists of a trans-
lated string of 8-bit bytes, with the first byte of the string
corresponding to the configuration punched in column 1 and
the last byte of the translated string corresponding to col-
umn 80 •. The card image is always presented to the control-
ling system in column order.
Figure 1 illustrates how the first two columns of an EBCDIC
card image are presented to the controlling system. Note
that column 2 contains an invalid EBCDIC punch configura-
tion, which is translated as 8 zeros and which causes a trans-
mission data error condition (see IErrorConditions" in Chapter
3). If column 1 of a card contains punches in rows 1 and 2,
the entire card is interpreted as a binary card image rather
than an EBCDIC image (see IlRead Orders" in Chapter 3).
II
)
000000000
1 2 3 4 5 6 1 8 tl
1111111111\
2122222222
3333333333
444444444
555555555
6666666~6
177171717
8888888888
Column
9999999999 J
123.; 5 6 1 B 910
~'
I
n
n+1
Byte , " , ,
Data 11100 0001 1,0000 0000 I
Bit Position 0 1 2 314 5 6 710 1 2 3 i4 5 6 7
Validity
Valid
Invalid
Figure 1. EBCDIC Read Operation
2 Functional Description
BINARY CARD FORMAT
In the binary card format there are 4096 possible punch con-
figurations for a single card column, and all configurations
are valid. In this format each card column corresponds toa
12-bit code in the range 0-4095 (00016-FFF16)' with each
row punch corresponding to a 1 in the 12-bit code. Thus,
the binarycard image consists of a string of 80 12-bitcodes,
with the first code corresponding to the actual punch con-
figuration in column 1 and the last code corresponding to
the actual punch configuration in column 80. Because
Sigma I/o systems use an 8-bit byte as the basic data group-
ing, the 80 12-bit codes are presented to the controlling
system as 120 8-b it bytes.
Figure 2 illustrates how the first two columns of a binary card
image are presented to the controlling system. Note that
for odd-numbered columns, the data in rows 12 through 5
comprise one
byte and that the data in rows 6 through 9 are
combined with the data in rows 12 through 1 of the next
even-numbered column to form a second byte. A third byte
is formed from the data in rows 2 through 9 of the even-
numbered column. Thus, for each odd- even-numbered
pair of binary card columns, the controlling system receives
a sequence of three 8-b it bytes.
Card Row
IF
12 11
o 1 2 3 4 5.6
7 8 9 12 11 j 0
112
\ I I
"-
I
...
I
Column I
Byte n
n+1
__ """'. ___ ,I r""-- ... ·---, If
I
0000000
12 J 4 567
1111111
2122222.
13333333,
414444444
155555555
61666666l
717777777
818888888
999999999
1 2 1 ~ 5 6 1 B ~
3.!56789
...
2
n+2
*
I
D.a ta.. 10 1 0 1 0 10 110 0 00 00 00 11 0 1 0 1 0 10 I
Bit P os I tI on 0 I 2 3 4 5 6 7 0 I 2 3 4 5 6 7 0 I 2 3 I 4 5 6 7
Figure 2. Binary Read Operation
The binary card image is always presented to the controlling
system in column order and in the byte sequence described
above.
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CARD READER STATES
The initial state of the card reader depends on its power
status. The complete absence of power to the card reader
subsystem (that is, the absence of its prime ac power and
system
dc power) effectively removes the card reader from
the controlIing system. All attempts to access the card
reader result in a response of "no input/output address rec-
ognition" to the I/O inshuctions. Furthermore, unpredictable
status conditions are supplied if status response is requested
by
the I/O instruction. In the absence of ac power, the
presence of system
dc power will enable address recognition,
but the card reader assumes a "not operational" state. L ike-
wise, failure of power supplies internal to the card reader
causes the card reader to assume a "not operational" state.
OPERATIONAL STATES
The presence of ac and dc power, with no read station faul t
or transport mechanism fault, enables the card reader to as-
sume either of two device conditions ("ready" or "busy")
and either of two modes ("manual" or "automatic"). A read
station fault exists if one or more of the photoelectric
channels for sensing punches in the card rows have failed to
pass
the read station test in the previous card read operation.
A transport mechan ism faul t exists if a card jam exists in any
portion of the card transport area.
The exact condition and mode status of the card reader at
any given time is returned to the controlling system in re-
sponse to such I/O instructions as SIO, HIO, and no.
Other I/O instructions, such as AIO and TDV, provide more
specifi c indications of the card reader's status (see "Status
Response" in
Chapter 3). Abriefexplanationofthepossible
conditions and modes of the card reader follows.
CONDITIONS
Ready. In the" ready" condition the card reader is capable
of accepting an SIO instruction, providing no device inter-
rupt is pending. In order to be in the "ready" condition,
the card reader must be operational (that is, all conditions
defined under "Operational States" must be satisfied) and
the execution of an order to read a card is not in progress
or
pending.
Busy. In this condition the card reader has accepted an SIO
instruction. The unit will not accept a new S10 until the
current order list is completed and no device interrupt is
pending.
MODES
Manual. The card reader assumes the "manual" mode when
any condition arises requiring operator intervention before
the reader can function normally (e.g., stacker full, hop-
per empty, etc.). The "manual" mode is forced by the
operator pressing the STOP switch or RESET switch on
the card reader control panel. The reader can accept an
SIO instruction in this mode, but will not act on it in any
way until it enters the "automatic" mode.
Automatic. When all necessary conditions for successful
card
reader operation are present, the reader is placed in
the "automatic" mode by the operator pressing the START
switch on the card reader control panel (thus illuminating
the switch).
TRANSITION BETWEEN STATES
The allowable card reader state transitions and the condi-
tions causing the reader to change from one state to another
are summarized in Table 2.
DATA TRANSFER
A card read operation is initiated by the controlling system
with a
START INPUT/OUTPUT (SIO) instruction if all the
following conditions are satisfied:
1. Input/output address recognition exists.
2. The card
reader is in the" ready" condition.
3. No interrupt is pending.
If the card reader is in the "automatic" mode, it then requests
an order from the controll i ng system. After accepting a read
order, the card reader advances a card from the input hop-
per to the read station, and commences to read the card,
column by column, beginning with column 1. If reading is
performed in the EBCDIC mode, one 8-bitbyte is transmitted
to
the controlIing system for each col umn read, and a code
validity check is performed on each byte. In the binary
read mode three 8-bit bytes are transmitted to the control Iing
system for
each odd-even-numbered pai r of col umns (no
val
idity check is performed in this mode). Reading continues
until
one of the following conditions occurs:
1. The end
of the card is detected.
2. The card reader receives a "count done" or "halt" sig-
nal from the controlling system.
3. A "fault" condition is encountered.
If the card read operation was not terminated by a card jam,
the card is then routed to the stacker station, where it is
sensed and directed to the normal stacker unless:
1. The Read Automatic order specified error stacking and
the
validity check (for EBCDIC mode only) indicated
that the card contained an invalid EBCDIC punch con-
figuration, in which case the card is directed to alter-
nate stacker 2 (Model 7120) or to the alternate stacker
(Model 7140).
2. The Read order specified error stacking and a data over-
run has occurred, in which case the card is directed to
al
ternate stacker 2(Model 7120) or the alternate stacker
(Model 7140) and the controlling system is notified of
the error with the Data
Overrun and Unusual End
indicators.
Card Reader States/Data Transfer 3
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3. The Read order specified error stacking and a read
verify error (Model 7140-02) has occurred, in which
case the card is directed to the alternate stacker and
the con~rolling system is notified of the error with the
read verify error indicator.
4. The Read order selected an alternate stacker uncondi-
tionally for this card, in which case the card is directed
to the selected stacker.
t
tFor Model 7120,
alternate stacker 1 or 2; for Model 7140,
a I ternate stacker or normaI stacker.
The photoelectric circuitry is automatically checked at the
beginning
of each card read cycle. If this check indicates
a malfunction, the card reader switches to the "not opera-
tional" state, lights the FAULT (Model 7120) or READ
(Models 7121/7122/7140) indicator, and signals "unusual
end" to the
controlling system.
If no "fault" or other condition caused the card reader to
switch to
the "not operational" state or the "manual" mode,
the card
reader either returns to the "ready" conditionor(if
command chaining has been specified by the controlling
system) requests a new Read order to read the next card.
Note that each read card cycle requires a Read order.
Table 2. Card Reader State Transitions
~
Present State
Ready Manual
Busy Manual Ready
Automatic Busy Automatic
Not Operational
Operational
Not possible
Not possible Not possibl e
Ready Manual
SIO accepted
ST ART switch operated
Not possible
---
with no operator inter-
vention required
Busy Manual • HIO
received
Not possible ST ART switch operated
• RESET switch operated
---
with no operator inter-
• I/O reset
vention required
• Invalid order
Ready Automatic
STOP or RESET switch
Not possible SIO
accepted
operated
---
Busy Automatic
• STOP switch operated
STOP switch operated
• Operation completed
• RESET switch operated
and card cycle com- and no operator inter-
• Execution completed
pleted but order pend-
vention required
---
and no order pending ing, or operator inter-
• HIO received
and operator inter-
vention required •
I/O reset
vention required • Inval id order
4 Data Transfer
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