Wang System 2200 User manual

TABLE OF CONTENTS
SECTION 1
U DESCRIPTION 1-1
1.1 GENERAL , - 1-1
1.2 MODELINFORMATION 1-18
1.3 SPECIFICATIONS 1-19
1.3.12200System;GeneralSpecifications 1-19
1.3.2 2200 CPU; Models A,B,C,S,T 1-19
1.3.3MemorySizes 1-22
1.3.4PeripheralCapabilities 1-22
1.3.5DynamicRange 1-22
1.3.6Subroutine Stacking- 1-22
1.3.7PhysicalParameters t. 1-23
1.4 PERIPHERALCABLELENGTHS ..f. 1-26
.r, , ' oa
SECTION 2 71-"V«' *
,:."i
2. INSTALLATION ...'., 2-1
2.1 INSTALLATIONGUIDE FOR WANG SYSTEMS '<*2-1
2.1.1Selecting A Location 2-1
2.1.2Controlling The Environment 2-1
2.1.3ElectricalEnvironment 2-3
2.2 DEVICEADDRESSASSIGNMENTS 2-4
2.2.1 2200 PeripheralDefaultAddresses 2-6
2.2.2AddressSetting On 2200 I/O ControllerCards 2-7
2.3RAM SIZESELECTIONS - 2-11
2.4 INCOMING INSPECTION 2-12
2.5 INSTALLATIONPROCEDURE 2-13
SECTION 3
3. OPERATION , 3-1
3.1 GENERAL - 3-1
3.2 PROGRAMMING OF OUTPUT DEVICES 3-1
3.2.1 The Select Statement 3-1
3.2.2DeviceTypeCodes 3-1
3.2.3Print 3-5
3.2.4List 3-5
3.2.5ConsoleOutput 3-6
3.2.6LineLength " 3-6
3.2.7 Special Techniques 3-8
3.2.8 Summary Of Console And Non-consoleDevice Output 3-12
From CPU
SECTION 4
4. THEORY OF OPERATION 4-1
4.1CPU GENERAL DESCRIPTION 4-1
4.1.1Introduction 4-1
4.1.2HardwareVersusSoftware 4-1
4.1.3GeneralHardwareDescription 4-4
4.1.3.1 RegisterStructure 4-4
4.1.3.2 MemoryStructure 4-8
4.1.3.3 SupportingHardware 4-11
4.1.3.4 Input/OutputStructure 4-15
ix

4.2 GENERALINSTRUCTION SET DESCRIPTION ' 4-16
4.3CPU FIRMWARE DESCRIPTION 4-22
4.3.1 CPU Processing 4-23
4.3.1.1 TextEntryPhase 4-23
4.3.1.2 Variable and line Number ResolutionPhase 4-23
4.3.1.3 TextAtomizing 4-25
4.3.1.4 ExecutionPhase 4-27
4.3.1.5 Recursion 4-27
4.3.1.6 ExpressionEvaluation 4-28
4.3.1.7 Looping (FOR/NEXT) 4-31
4.3.1.8 Subroutines(GOSUB/RETURN) 4-32
4.3.1.9 DeviceSelection 4-32
4.3.1.10 OutputDeviceSwitching 4-34
4.4 DETAILEDTHEORY OFCPU OPERATION(CENTRALPROCESSOR AND 4-35
POWER SUPPLY
4.4.1 CPU Hardware 4-35
4.4.2 CPU PowerSupply 4-88
4.4.32200Mnemonics it 4-90
.2
.3
.2.4
5.1.2.
5.1.2.
5.1.
5.1.2.5
5.1.2.6
5.1.2.
5.1.2.
.7
.8
.1.2.9
SECTION 5
5. -USER TERMINAL AND POWERSUPPLYHARDWARE OPERATION
5.1 VIDEODISPLAY
5.1.1VideoDisplayPrinciples
5.1.2Theory Of Operation "
5.1.2.1 VideoAmplifier *
SyncSeparator
Vertical Oscillator
VerticalDriver and Output '
Horizontal AFC Circuit
Horizontal Oscillator
HorizontalPulse Shape r
Horizontal Driver
HorizontalOutput
5.1.2.10 RetraceBlanking
5.1.2.11 Power Supply (73V Version)
5.1.2.12 PowerSupply (12V Version)
5.2THE TAPEDRIVEUNIT
5.2.1Theory Of Operation
5.2.1.1 InputDecoder
SignalConditioner
Take-upMotorControl **
DirectionControl
Output Buffer
Detailed Theory Of Operation
5.2.2.1 InputDecoder (L558)
Tape ForwardOperation (LOAD, SAVE, SKIP)
TapeReverseOperation (BACKSPACE)
Rewind
PowerDriver (L559)
Speed Control (L559)
Signal Conditioner (6175) and Output
Buffer (L558)
5.2.2
5.2.1.2
5.2.1.3
5.2.1.4
5.2.1.5
5.2.2.2
5.2.2.3
.4 5.2.2.
5.2.2.
5.2.2.
5.2.2.
5-1
5-1
5-1
5-3
5-4
5-6
5-7
5-8
5-10
5-12
5-12
5-13
5-13
5-17
5-18
5-19
5-19
5-20
5-20
5-20
5-20
5-20
5-20
5-20
5-21
5-21
5-21
5-22
5-22
5-22
5-23

SECTION 6
6.CPU INPUT/OUTPUTCONTROLLERCIRCUITBOARDS HARDWARE OPERATION 6-1
6.1 INPUT/OUTPUT DEVICE SELECTION 6-1
6.1.1 Introduction 6-1
6.1.2 AddressComparator 6-1
6.1.3 SelectLatch 6-2
6.1.4Ready/BusyDecoder 6-2
6.2 VIDEODISPLAYCONTROLLER 6-2
6.2.1 GeneralTheory of Operation 6-2
6.2.1.1 Timing 6-2
6.2.1.2 DeviceSelection and DataInput 6-2
6.2.1.3 ClockDecoder 6-2
6.2.1.4 HorizontalCounter 6-3
6.2.1.5 VerticalCounter 6-3
6.2.1.6 CursorCharacter andRow Counters 6-3
6.2.1.7 CursorCharacter andRow Compare 6-3
6.2.1.8 MemoryAddressSelection 6-3
6.2.1.9 CharacterGenerator Row SelectCounter 6-5
6.2.1.10 CharacterGenerator and Conversion 6-5
6.2.1.11 Output Gates 6-5
6.2.1.12 RollCounter and Compare 6-6
6.2.1.13 ControlFinctionDecoder 6-7
6.2.1.14 ControlFunctions 6-7
6.2.1.15 Read Cycle 6-7
6.2.1.16 WriteCycle 6-8
6.2.2 DetailedTheory Of Operation 6-8
6.2.2.1 Device Selection 6-8
6.2.2.2 "D" Clock and ClockDecodeLogic 6-8
6.2.2.3 VerticalCounter . 6-9
6.2.2.4 HorizontalCounter 6-9
6.2.2.5 ControlFunctions 6-10
6.2.2.6 Roll 6-11
6.2.2.7 CharacterGeneration 6-12
6.2.2.8 Cursor Generation 6-13
6.2.2.9 Writing a Character Into Memory 6-13
6.2.2.10 Lower To UpperCaseConversion 6-14
6.2.3Differences In Video Display Controllers 6-U
6.3 KEYBOARDCONTROLLER6-18
6.3.1 General Theory Of Operation 6-18
6.3.1.1 DeviceSelection 6-18
6.3.1.2 ScanClock 6-18
6.3.1.3 Y Multiplexer 6-19
6.3.1.4 RDMand OutputLatch 6-19
6.3.1.5 FunctionDecoder 6-19
6.3.2DetailedTheory Of Operation 6-19
6.3.2.1 DeviceSelection 6-19
6.3.2.2 KeyboardInputCycle 6-19
6.3.2.3 Function Key Detector 6-22
6.4 TAPEDRIVECONTROLLER 6-22
6.4.1GeneralTheory Of Operation 6-23
6.4.1.1 Device Selection 6-23
6.4.1.2 ControlDecoder 6-23
6.4.1.3 OutputBuffer 6-23
xl

6.4.2DetailedTheory Of Operation
6.4.2.1 ControlDecoder
' 6.4.2.2 Output Buffer
6.5 DISKCONTROLLER
6.5.1Cener.ilTheory Of Operation
6.5.1.1 DeviceSelection
6.5.1.2 Input Buffer
6.5.1.3 Output Buffer
6.5.2DetailedTheory Of Operation
6.5.2.1 DeviceSelection
6.5.2.2 PrimeCircuit
6.5.2.3 InputBuffer
6.5.2.4 OutputBuffer
6.6 DISK MULTIPLEXER CONTROLLER (2230 MXA/B)
6.6.1Theory Of Operation
6.6.1.1 DeviceSelection
6.6.1.2 ScanClock
6.6.1.3 Channel Scanner
6.6.1.4 CPUI/O Buffer
6.6.1.5 Hog Latch
6.6.2DetailedTheory Of Operation
«r 6.6.2.1 ScanClock
6.6.2.2 ChannelScanner
6.6.2.3 CPUI/O Buffer
6.6.2.4 PrimeCircuit
6.6.2.5 Hog Latch
i 6.6.2.6 Drive #3 Latch
6-23
6-24
6-24
6-24
6-24
6-24
6-25
6-25
6-25
6-25
6-26
6-26
6-26
6-26
6-26
6-27
6-27
6-27
6-27
6-28
6-28
6-28
6-28
6-29
6-30
6-30
6-30
SECTION 7
SYSTEMDIAGNOSTICS ' 7-1
7.1 MODEL 2200 A,B ANDC CPU BASIC DIAGNOSTIC TESTS 7-1
7.1.1Test 1 and2 7-1
7.1.2Model 2200B BasicDiagnosticTest 7-2
7.1.3Model 2200C BasicDiagnosticTest 7-3
7.1.4Model 2200S BasicDiagnosticTest 7-4
7.1.5Model 2200T DiagnosticTest 7-5
7.2 2200 MEMORY AND MATHDIAGNOSTIC TESTS (MEM-1, MEM-2, and7-5
MATH-3)
7.3 2200 B ANDC MEMORYDIAGNOSTIC 7-6
7.4 OPTIONDIAGNOSTICS 7-6
7.4.1Matrix(Option 1 or Option 21) Diagnostic 7-6
7.4.2General I/O (Option 2 or23)7-7
7.4.3Edit(Option 3) Diagnostic 7-8
7.4.4AudioAlarm(Options 4 and31) Diagnostic 7-9
7.4..S Sort (Option 5) Diagnostic 7-9
7.4.6AdvancedProgranmable(Option 22) Diagnostic 7-10
7.4.7 Disk ROM (Option 24) Diagnostic 7-10
7.4.8KeyboardClicker(Option 32) Test 7-10
7.5 PERIPHERALDEVICEDIAGNOSTICS 7-10
7.5.1 2200 InputSystemDiagnostic 7-10
7.5.2OutputSystem Diagnostic 7-25
7.5.3Model2207A/2227-Diagnostics 7-25
7.5.4Model 2221W Diagnostics 7-31
7.5.5Model2224 and 2230MXA/MXBDiagnostics 7-32
xii

7.5.6 2230/2260 Diagnostics
7.5.7Model2230 MXAandMXB Diagnostics
7.5.8Model 2234/2244 Diagnostics
7.5.8.1 ElectromechanicalTests
7.5.8.2 DataTests
7.5.9Model2234A Or 2244ADiagnostics
7.5.9.1 See Paragraph 7.5.8.1 A
7.5.9.2 Data/Program Tests
7.5.10 Model 2240/2242/2243 Diagnostics '
7.5.11 Model 2241 Diagnostic
7.5.12 Model 2250 Diagnostic
7.5.13 Model2252Diagnostic
7.5.14 Model 2261 Diagnostic
7.5.15 Model2262Diagnostic
7.5.16 Model2209Diagnostic
7.5.17 WCS 20/30 DiagnosticPrograms
SECTION 8
MAINTENANCE INFORMATION FOR USER TERMINALS, POWER SUPPLIES AND8-1
CPU'S
8.1 PREVENTIVEMAINTENANCE
8.1.1Cleaning
8.1.1.1 CentralProcessing Unit
8.1.1.2 Video Display/TapeDriveUnit
8.1.1.3 PowerSupply (2200 A,B,C Systems)
8.1.2Lubrication
8.2 TROUBLESHOOTING
8.2.1Video Display
8.2.2 The TapeDriveUnit
8.2.3 The CentralProcessingUnit
8.3 ADJUSTMENTS
8.3.1RecommendedTestEquipment/ToolList
8.3.2 CPU- VoltageAdjustProcedure
8.3.3VideoDisplayUnit
8.3.4TapeDriveUnit
8.4 CHASSIS LAYOUT(S) AND SUPPLEMENTARYDATA
8.4.1 2200 CPU; Models A,B,C;6 I/O Slots
8.4.2 2200 CPU; Models A,B,C;11I/O Slots , ,
8.4.36222Version; 2219 Chassis
8.4.4 2200 Models S,T
8.4.5 2200 S/T- 9 Slot (OP 20A)
8.4.6 2200 PS- Power Supply ForCPU Models A,B,andC
8.4.7 2215 BasicKeyboard
8.4.82222AlphanumericKeyboard
8.4.92223Upper/LowerCaseAlphanumericKeywordKeyboard
8.4.10 2216/2217 VideoDisplay And CassetteDrive Console
8.4.11 2220IntegratedVideoDisplay /Cassette Drive/Keyword
Keyboard Console
8.4.12 IntegratedVideoDisplay/KeywordKeyboardConsole 8-59
8.4.13 2217 (TD-24) CassetteDrive 8-61
8.5 COMPONENTREPLACEMENTS 8-63
8.5.1 CPU 8-63
8.5.2VideoDisplayUnit 8-64
8.5.3TapeDriveUnit 8-67
xiii
**••••«•

SECTIOH 9
2200 SYSTEMOPTIONCONVERSIONS AND RETROFITS
9.1 2200 A/B/C BOMAND SUPERPATCHOPTIONS
9.1.1Super Patch Boards
9.1.2 Marking Of ROM and Superpatch PC Boards
9.2 MODELS 2200S AND 2200T ROM BOARDS
9.3 ROM AND SUPERPATCH CHART - 2200 A/B/C/S/T CPU'S
9.4 OPTIONCONVERSIONS
9.4.1Option 1 (Matrix Option) Conversion Procedure
9.4.2Option 2 (General I/O) ConversionProcedure
9.4.3Option 3 (EditOption)ConversionProcedure
9.4.4Option 4 and Option 31 (AudioAlarm)Conversion
Procedure
9.4.5Option 5 (Sort ROM) ConversionProcedure
9.4.6Option 20 (ThreeExtra I/O Slots For 2200S CPU)
ConversionProcedure
9.4.7Option 20A(9 Slot I/O) ConversionProcedure
9.4.8Option 21 (MatrixROM)ConversionProcedure
9.4.9Option 22 AdvancedProgramming And Matrix ROMs
9.4.10 Option 23 General I/O, AdvancedProgramming And
MatrixROMs
9.4.11 Option 24- Disk ROM
9.4.12 Option 30 (Upper/LowerCaseDisplay)Conversion
Procedure
9.4.13 Option 32 (Keyboard Clicker) ConversionProcedure
9.5 2200 SYSTEM MEMORY OPTIONS
9.6 2200 SYSTEMRETROFITS
9.7 PERIPHERALRETROFITINSTRUCTIONS
9.7.1 600/700 PeripheralConversions to 2200 Peripherals
to 2201
to 2202
to 2212
to 2221
,9.8
601/701
602/702
612/712
621/721
630/730 to 2230
632/732 to 2232
640/740 to 2240
2234 to 2234A and 2244 to 2244A/Conversion
MISCELLANEOUS 2200 SYSTEMRETROFITS
9.8.1 Model 2201 ON/OFF Switch-ConversionProcedure
9.8.2Conversion From 2201 to 2212 and 2232
9.8.3 Conversion Of 2215 and 2222 With 6367 PC Board
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
9-1
9-2
9-2
9-2
9-3
9-4
9-9
9-9
9-11
9-12
9-16
9-17
9-19
9-20
9-20
9-21
9-22
9-23
9-24
9-24
9-37
9-38
9-39
9-39
9-39
9-39
9-39
9-39
9-40
9-40
9-40
9-40
9-42
9-42
9-43
9-43
SECTION 10
10. MECHANICALASSEMBLYDRAWINGS
SECTION 11
11. APPENDICES
APPENDIX A - ASCII CODE CHARACTER SET
APPENDIX B - LISTING OF ERRORMESSAGES
APPENDIX C - 2200 PERIPHERALADDRESSSETTINGS BY MODEL NUMBER
APPENDIX D - PRINTEDCIRCUIT BOARD REVISIONLISTING AND
ADDITIONALREFERENCENOTES
10-1
11-1
11-1
11-3
11-31
11-35
xiv

SECTION 1
DESCRIPTION
1.1 GENERAL
The WangModel 2200 AdvancedProgrammableCalculatorcombinessimple
keyboard operationwith the versatility of BASIClanguageprogramming, a
compiler languageused by manylargerscalecomputersystems. The
Model 2200 is essentially a single-user,noninterrupt,microprogrammed
system. The WangBASICcompiler is interpretive, operating directly
on user text and saving inRAM whererequired.
A fundamental 2200 system incorporates the following:
a) Central Processor Unit
I FIGURE1-11
b) SystemPowerSupply
IFIGURE 1^2
[FIGURE1-31
1-1

c) UserTerminals
FIGURE 1-4;
2216/2217/2223
FIGURE 1-5; 2220
FIGURE 1-6; 2226
The CPUa)is comprised ofROM (with or withoutsoftware options),
Arithmetic/Logiccircuitry,systemcontrollogic, I/O interface(expanded
in 2219 chassis), and approximately3.4Kbytes (expandable) of user-
available RAM(4K actual RAM space for smallestmemoryoption) . TheCPU
constitutes the 'heart' ofa 2200 system.
The systempowersupply is eitherpackagedwithin theCPU chassis
(2200 S,T)*, oris packagedseparately (2200 PSforA,B,andC CPU
chassis; see figure 2).
The userterminal is comprised ofa userinputkeyboard (2215, 2222,
2223), a 16 line/1024-character videodisplaywhich is available ina
12 inch (diagonal measure)screen (2216/2226) ora 9 inchscreen (2220
console), anda Model TD-24 digital tape cassettedrive (2217) for
storage and retrieval of userprograms and data. The physical
1-2

packaging ofthe userterminaltakes oneof threeconsoleconfigurations.
The firstconsolecombines a videodisplay anda TD-24 cassettedrive
(2216/17 console) shown in figure 4;the keyboard is packagedseparately
(2215, 2222,2223;figure 4).The secondconsolecombines the smaller
9 inch, (diagonal) videodisplay, a TD-24 cassettedrive, andan upper/
lower caseKeywordKeyboardidentical tothe 2223keyboard (2220 console;
figure 5).The thirdconsolecombines a 12 inch (diagonal) video
display andan upper/lowercaseKeywordKeyboardidentical tothe 2223
Keyboard; consolestorage/retrieval of bulkuserdata and programs is
accomplished via disk orvia separate2217 or 2218. (2226 console;
Figure 6).
2200A/B/C CPU- 6 I/O
FIGURE 1-7
2200 S/TCPU- 3/6I/O
FIGURE 1-8
FIGURE 1-9
2219 A/B/C CPU- 11I/O
FIGURE 1-10
2200 S/TCPU- 9 I/O
1-3

A number of special-purposeoptions are available:
2200 OKII ONIt 01'J I ON DKSCKiniON
ACCOMMODATING CPU- USAGE
2200B 2200C 2200S2200T
OP-l
OP-2
OP- 3
OP-4
OP-5
OP-20
OP- 20
OP- 21
OP-22
OP-23
OP-24
OP- 30
OP-31
OP-32
Matrix ROM Mutually
exclusive with OP-5
General I/O ROM
Kdlt ROM
Audio Alarm for
2216 Dlnplay
Commercial Matrix/
Sort ROM(Mutually
exclusive ulth OP-l)
3 Extra I/O Slots
9I/O Slot Ch.ieelB
Mntrlx ROM
Advanced Programmable
ROM plus OP-21
General I/O ROM
plus OP-22
Disk Capability
plus OP-23
Upper/Lower case
Display (for2220,
2216A, or 2226)
Audio Alarm for
2220 and 2226
consoles
Keyboard Clicker
-X X - -
-X X - -
X X StandardStandardStandard
XX X X X
-X X - -
XX
XX
-- X Standard
-- - X Standard
X Standard
-- X Stand.--1
X X X X X
X X X X X
X X X X X
X - Option available
-- Option not available'
1-4

Option Descriptions
Options 1 or21 (OP-I/ OP-21)providematrixstatementsdesigned
\to reduceexecutiontime anduse less RAM thanwould be requiredusing
standard 2200 statements to programmatrixoperations.
Options 2 or23 (OP-2, OP-23) allows the user to custom-tailor
input/output operations to suitspecialperipheraldevices.Thisoption
alsofacilitateshigh-speedcharactercodetranslation and data packing/
unpacking.
Option 3 (OP-3) allowsindividualalphanumericcharacters ina
line of programtext,datavalues, or program text currentlybeing
entered from a Keyboard, tobe altered,deleted, or insertedwithout
_, inputting the entireprogramline again.
Options l*or31 (OP-4, OP31) cause an audiblesignal to alert
the systemuserwhen(forexample) an erroroccursunderprogramcontrol.
The alarm maybe sounded by programming a predesignated HEX codewherever
desired.
Option 5 (OP-5) provides six matrixstatements for flexible and
rapid searching,moving, and orderingdata in System 2200B orC CPU's.
Option 5 is mutuallyexclusivewithOption 1.
Options 20and20A (OP-20, OP-20A) provide6-slot and 9-slot I/O
capabilities (respectively)with any 2200S or 2200T CPU.
Option 22 (OP-22) provideseleven bitand byte manipulation
statements and functionswhichgreatlyincreaseprocessingcapability
by reducingprogrammingrequirements for suchapplications.Option 22
includesOption 21.
Option 24 (OP-24) provides all disk I/O capabilities, and includes
Options 22and21.
Option 32 (OP-52) causes an audible "click" whenever a keyis
} depressed;thus an experiencedprogrammer or typist(forexample)need
1-5

not "bottom out" a keyto ensureentry,therebyincreasing input speed.
The "click"soundalsolessens the need to verifyentry by checking
the videodisplay.
A full compliment of peripheraldevicesinterfacewith the 2200 CPU:
PERIPHERAL/DESCRIPTION ACCOMMODATING CPU
2200A 2200B 2200C 2200S 2200T
2201OutputWriter
2202 Plotting Output
Writer
2203 Punched Tape Reader
2207 RS-232-C Input/
Output Interface
with Fixed BAUD
Rate
2207A RS-232-C Input/
Output Interface
with Selectable
BAUD rate
2209 Nine Track Mag.
Trfpe Drive
2212AnalogFlatbed
Plotter
2214 Mark Sense Card
Reader
X X X X X
X X OP-22 X
Min.
Req'd
X X OP-22 X
Min.
Req'd
limited X X X X
use
limited X X X X
use
OP-2 OP-2 OP-23 12K
and12K dncl 1?K,mdWKKAM
HAM KAMHAM MI,,.
Mill. Min.HIM. KPI|"'
Req'd Req'd Req'd
-X X OP-23 X
Min.
Req'd
limited X X OP-22 X
use Min.
Req'd
1-6

PERIPHERAL/DESCRIPTION
2200A
2215
2216
2216A
2216/17
2216A/17
2217
2218
2220
2221
BASIC Keyword
Keyboard
Executive Video
Display
Upper/Lower Case
Executive Video
Display
Combined 2216/2217
Console
Combined 2216A/2217
Console
SingleCassette
Drive
DualCassette
Drive
Integrated Console
LinePrinter;
(132Column)
Requires
OP-3 for
Keyboard
Edit
X
X
X
X
X
X
Requires
OP-3
for
Keyboard
Edit and
OP-30
for U/L
case
X
ACCOMMODATING CPU
2200B 2200C2200S2200T
Requires XXX
OP-3 for
Keyboard
Edit
XX X X
X X X X
XX X X
XX X X
XX X X
XX X X
Requires RequiresRequiresRequires
OP-3 OP-30OP-30OP-30
for forU/LforU/LforU/L
Keyboard casecasecase
Edit and
OP-30
forU/L
case
XX X X
1-7

PERIPHERAL/DESCRIPTION ACCOMMODATING CPU
2200A 2200B2200C2200S2200T
2221W
2222
2223
2224-2,
3,4
2226
2227
'2227N
2230-1,
2,3
2230MXA,
MXB
2231
Line Printer
(132column)
Typewriter
Keyboard
Alphanumeric/
BASIC Keyword
Keyboard
Disk Multiplexer
Combination Vtdeo
Display/U/L Case
KeywordKeyboard
for WCS.
Telecommunications
Controller
Null Modem
Fixed /Re movable
Disk Drive
DaisyChain
Disk Multiplexers
Line Printer
XX X X X
OP-3 for OP-3 for
Keyboard Keyboard
Edit Edit
Requires Requires XXX
OP-3 for OP-3 for
KeyboardKeyboard
Edit Edit
X X QP-24 *
Required
-- - X X
Limited OP-2OP-2 OP-23 X
Use Recomm.Recomm.Recotmn.
XX X X X
-X X OP-24 X
Required
XX
OP-24
X
Required
X X X X X
1-8