IBM System/7 Functional Characteristics - All about the IBM 1130 ...

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Table word(hexadecimal)nn + 1n + 2n + 3n + 4n + 5n + 6Contents(hexadecimal)Level 0 program - check old instruction addressLevel 0 sublevel 0 interrupt routine addressLevel 0 sublevel 1 interrupt routine addressLevel 0 sublevel 2 interrupt routine addressLevel 0 sublevel 3 interrupt routine addressLevel 0 sublevel 4 interrupt routine addressLevel 0 sublevel 5 interrupt routine addressAscending n + 7 Level 0 sublevel 6 interrupt routine addressstorage n + 8 Level 0 sublevel 7 interrupt routine addresslocations n + 9 Level 0 sublevel 8 interrupt routine addressn + An + Bn + Cn + Dn + En + Fn + 10Level 0 sublevel 9 interrupt routine addressLevel 0 sublevel A interrupt routine addressLevel 0 sublevel B interrupt routine addressLevel 0 sublevel C interrupt routine addressLevel 0 sublevel D interrupt routine addressLevel 0 sublevel E interrupt routine addressLevel 0 sublevel F interrupt routine addressFigure 3-4. Priority level table formatInterrupt Sublevel BranchingThe user assigns a priority level and sublevel to an I/O device by a single prepare I/Ocommand. Each I/O device that is to request interruptions to the processor must beprepared by a separate prepare I/O command, which assigns a priority level and sublevelto the device.Upon detecting an interruption (from a source prepared for interruptions), the systemexamines the priority level to determine whether the interruption is to be permittedaccording to the interruption mask register. If the same level or a higher level isprocessing and the interruption is permitted, the request remains in the buffer. If thesame level'or a higher level is not processing and the interruption is permitted, theinterruption request is honored.Using the level number, the system accesses the branch table reserved for that level.Using the sublevel as a displacement value, the system locates the desired address in thebranch table and then branches to that address. This address is the starting address ofthe servicing routine that the user has established in main storage for the interruptingsource. This total interruption process is performed in less than 1 microsecond.Multiple interrupting sources (I/O devices) can be assigned to the same interruptionlevel and sublevel. Thus, a common interruption servicing routine can be used for multipleor similar I/O devices. The one device (out of two or more assigned to the same interruptionlevel and sublevel) that actually caused the interruption is determined by the program'sexamining the accumulator contents immediately after the interruption.4
The accumulator associated with the level contains the address of the I/O devicecausing the interruption, in the following format:0 4 10 15Sublevel1 1 1 1Deviceaddress1 1 1 1 1Moduleaddress1 1 I I0-F X X XDuring interruption presentation, an I/O device also presents a summary status bit (S),which is placed in the carry indicator. The carry indicator is set to 0 if a normal interruptioncondition occurred, or to 1 if an exception interruption condition occurred. Exceptionconditions that set the summary status bit are noted in descriptions of I/O commandsfor I/O devices, later in this manual.CLASS INTERRUPTIONSInternal machine error conditions can cause three types of class interruptions:1. Machine check, caused by a machine error or by program execution.2. Program check, caused by an invalid machine instruction.3. Power/thermal warning, caused by a power or thermal irregularity.Class interruptions alert the system to error conditions which may prevent furtherprocessing. Machine checks and program checks cannot be prevented from interruptingthe system. Power/thermal warning class interruptions, however, are controlled by thesummary mask and are inhibited during execution of the supervisor call (SVC) instruction.(Supervisor call is discussed in more detail in Chapter 4.)Because of their nature, class interruptions immediately disable all four priority interruptionlevels and cause a branch via one of the main storage locations reserved for class interruptionstart addresses. (See "Reserved Storage Locations" in this chapter.) Machine checks andprogram checks turn on the summary mask function. A power/thermal warning that occurswhen the summary mask function is off will also turn it on.A class interruption does not cause a change in priority level; the interruption isserviced on the level that is active when the error condition occurs. If no level isactive when a power/thermal warning interruption occurs, the interrupt is serviced onpriority level 3. When the class interruption is serviced, the servicing program shouldsave any register contents and/or status information needed to restart the program.Lights on the operator console indicate the cause of a class interruption when theprocessor is in the stop state. In addition, a machine instruction (load processorstatus) can check the processor status to determine the specific cause of the interruption.This instruction is described in more detail in Chapter 4.Priority of Class InterruptionsAlthough class interruptions are serviced on the current priority level, they are servicedaccording to class priority hierarchy. A machine check has the highest priority, aprogram check has the next priority, and a power/thermal warning has the lowestpriority. The load processor status instruction resets all class interruption indicatorsexcept for power/thermal warnings.System/7 Interruptions 3-9
Page 3 and 4: GA34-0003-7File No. S7-00IBM System
Page 5 and 6: ContentsPrefaceChapter 1. Introduct
Page 7 and 8: Flagging 15-26Track Initialization
Page 9 and 10: PrefaceThis reference manual is a s
Page 11 and 12: IntroductionCHAPTER CONTENTSSystem/
Page 13 and 14: Figure 1-1. IBM 5028 Operator Stati
Page 15 and 16: • One or two analog output points
Page 17 and 18: Power Failure and Thermal WarningPo
Page 19 and 20: IBM 5010 Processor ModuleCHAPTER CO
Page 21 and 22: StorageProcessorAACycleSteal/ Featu
Page 23 and 24: The processor does not recognize in
Page 25 and 26: DATA FORMATSInput/output data can b
Page 27 and 28: The absolute form can be obtained i
Page 29 and 30: Accumulators (ACC 0 to ACC 3)Page o
Page 31 and 32: Overflow IndicatorThe overflow indi
Page 33 and 34: System/7 InterruptionsCHAPTER CONTE
Page 35 and 36: Level 1interruptionprocessing'.ros
Page 37 and 38: Interruption Mask Register and Summ
Page 39: Page of GA34-0003-6,-7As Updated Au
Page 43 and 44: Page of GA34-0003-6, -7As Updated A
Page 45 and 46: The summary mask isturned on; sampl
Page 47 and 48: Processor InstructionsCHAPTER CONTE
Page 49 and 50: InstructionMnemonic'OperationcodeLo
Page 51 and 52: ' rrrI !Mil,. '11111E1 luluINSTRUCT
Page 54 and 55: "" ',Pli iI 1114111111111111 111111
Page 56 and 57: Load Immediate (PLI)0 5 8 15Op code
Page 58 and 59: Store Accumulator (PST)0 5 8 15Op c
Page 60 and 61: vow wow. •1•01111111111111111
Page 62 and 63: NMI INNI 1111=111111 IM11111■1111
Page 64 and 65: 11111 !III VIII I 1101 1,411111111,
Page 66 and 67: I i 1111111'1Np■I0111m PIP ,ili11
Page 68 and 69: Example:Word in accumulator 0110 11
Page 70 and 71: Exclusive ORing occurs only between
Page 72 and 73: Shift Left Circular (PSLC)0 5 8 11
Page 74 and 75: Shift Right Arithmetic (PSRA)0 5 8
Page 76 and 77: Example:PB instruction(R = 110 spec
Page 78 and 79: Branch and Link Long (PBALL)0 5 8 1
Page 80 and 81: Branch Conditional (PBC►0 5 8 9 1
Page 82 and 83: Branch and Unmask Long (BUL) (5010
Page 84 and 85: Skip Conditional (PSKC)0 5 8 9 15Op
Page 86 and 87: Example:0 5 8 15PAS instruction(loc
Page 88 and 89: Load from Register (PLR)0 5 8 15Op
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Load Processor Status (PLPS)0 5 8 1
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Write IAR Backup (WIB) (5010 Proces
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Store Indicators (STI) (5010 Proces
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Executing the OR-to-mask instructio
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the process position. If the system
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Read Protect Key (RPK)0 5 8 11 16 2
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Module address field:Module address
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11111E111111111 M11111111•11111 1
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1111111111111111111111■11•11111
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Page of GA34-0003-6, -7As Updated A
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Sixteen bits of additional module i
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1 REG 1---LEVEL0 10 0 2 1 20 0 0 03
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CTL CHK (Control Check) LightThis l
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1111■111111,11,11N I IIIADDRESS L
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CHECK CONTROL SwitchThis three-posi
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START KeyPressing the start key cau
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The processor module contains two 1
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6-4 GA34-0003II I 1 1 III 111 1111
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.11.1111111.111 MP I 111.10114P III
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1111 Minn. 11111111R !VW IMF" !PFLI
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The ACCA must be selected in order
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111.1111 111111 N uData and control
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I II III• 1111111111111111 1•11
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Significant Bits Meaning7* Data set
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I■ 0=11 1111111 MEM11 1111111111
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". — •• 11•111•MI !IF lim
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V IIF 1,1 NM IICONTROL CHARACTERS A
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Character SynchronizationCharacter
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Bit 1-Reserved.Bit 2-Transmit Opera
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1,114plilloi 1110 1111 1111.11 VI P
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1 1 - 1111=111111111 111M 1111 111
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The 5028 Operator Station (Figure 9
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Thickness Paper - .004 + .0003" (0,
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Character bit position 84 Tape move
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If the operator station motor is no
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Feed Tape and Print0 5 8 11 16 20 2
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Read 1SW0 5 8 11 16 20 26 31Op code
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The 5014 Analog Input Module Model
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Convert Analog Input with External
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Read ISW0 5 8 11 16 20 26 31Op code
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10-8 GA34-0003
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11111811111111.1.1.14.111.1111I II
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" 11, 141MINMIIIIF I WPM P IP !! 11
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Read and Convert ADC0 5 8 11 16 20
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Device Status Word (DSW): The 16 bi
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1411111111,1111111111n 111The 5014
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Convert Analog Input with External
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12-6 GA34-0003
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The 5012 Multifunction Module Model
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MODULE DEVICE ADDRESSESANALOG INPUT
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The range bits (RRR) in the control
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H1111111111111 1111.111111HIVRead A
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I/0 CommandsThe prepare I/O and hal
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Data stored in the register can hav
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If a particular amplifier gain was
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' 14 111•141111111111111011114111
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Read Digital Input Reference Regist
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Digital Input Groups Without Proces
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CIA ^iN1i Ma IIl AMINNNP u 11.!..11
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Write Analog Output Holding Registe
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1111111■11111111101=11111.1111111
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=111111111111111111 1 11 1 11111111
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DataThe data byte contains either d
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Read CommandsAll read commands are
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Write Null Acknowledge: This code (
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Area Station Local I/O Guidance Cha
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2791/2793 Adapter Critical timingIn
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BeginDSC* 05Write(AS enters data mo
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oww1111111111111111111111111,1,, V
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Bit 15 in the R register can be set
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The 5013 Digital I/O Module Model A
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The prepare I/O command is used as
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Read Digital Input RegisterO 5 8 11
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Set Digital Input Interrupt Control
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DIGITAL OUTPUT CONTROLThe Digital O
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The 2792 Remote Communications Cont
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Data TransmissionInformation is tra
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The functions of the five bytes in
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Code nameHexBit patternResponse Com
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Read End Acknowledge: This code (he
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Begin Diagnostic: This code (hexade
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Page 258 and 259:
Command SequencesThe 2790 Control m
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An area station requiring service l
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Set Diagnostic Mode0 5 8 11 16 20 2
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14-32 GA34-0003
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FUNCTIONAL DESCRIPTIONThe IBM 5022
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FILE ORGANIZATIONEach surface of ea
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Sector Identifier FormatEach identi
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If fewer than 128 words are to be t
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When the IPL operation starts, the
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Recalibrate Operation: A recalibrat
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1111 11 I 111111111111WRead Initial
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If an error is detected during a da
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None of the data read is transferre
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Error and Status ConditionsErrors d
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Significant Bits Meaning5* No recor
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Significant Bits Meaning3 Seek chec
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FLAGGINGThe condition of a track su
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Track Initialization ProceduresThe
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Bit 5—No Record FoundIt should be
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15-32 GA34-0003
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I III 1111111111111111111111111111
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Interruptions to System/7The progra
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Initiate Read0 16 21 24 31111111Add
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Device Status Word (DSW): The 16-bi
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16-10 GA34-0003
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The IBM 5024 I/O Attachment Enclosu
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III 1111•1111111111•1111111 III
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11111 1 11•1111111111111111111111
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Reset 5024The reset 5024 resets the
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2502 Card Reader Translate TableA 2
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I/O Transfer BlockThe address of th
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Status Word 1.0 152502 status buffe
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Status Word 2.0 15Status word 1% St
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1 1 111111111111111111111111111•1
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IMP P 1111,1111.11,11311111 I MP 11
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11 11 1111111111 1 1111111111111111
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algaaaagIrlug",',/"'", BeltPosition
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• Disable Attention Interrupt 110
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Status Word 1.0 15aStatus word 1•
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Status Word 2.15Status word 1N+1Res
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Interrupt PresentationThe printer a
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17-30 GA34-0003
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Add immediateMnemonicExecutiontime
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Alter storage key (provided only wi
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BranchMnemonicExecutiont i me (ns)O
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Branch conditionalMnemonicExecution
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Exclusive OR registertMnemonicExecu
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Level exitMnemonicExecutiontime (ns
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Load immediateMnemonicExecutiontime
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OR registerMnemonicExecutiontime (n
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Read protect key (provided only wit
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1111■11111■111111111 1 11111111
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StopMnemonicExecutiontime Ins)Op co
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SubtractMnemonicExecutiontime (ns)O
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A-26 GA34-0003
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PIO instruction Function ModifierDe
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1111111■111111PIO instruction Fun
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Valid responses to 2790 read comman
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Interrupt status wordsDevice0 1 2 3
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Device status word (2502, 5024 with
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11.1 11111 11110•11111111111.1111
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5028ConsoleShift/ 5028BSCAACCAContr
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5028ConsoleShift/ 5028BSCAACCAContr
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triNtitTIBitRanges and bit values (
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.••■• III II III 11111.•
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E-6 GA34-0003
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Verifydata beforewrite analogoutput
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Prepare I/OSet referenceregisterYes
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F-6 GA34-0003IIII•1111■•■
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G-2 GA34-0003
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analog signal resolution (continued
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cycle steal feature data flow 2-3cy
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forced interruption control, digita
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initial program load (IPL) to Syste
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111111•1111111111■ IllO (OR) in
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ead, 5022 Disk Storage Module (cont
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11111111111111111■1 1111111 11111
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X-16 GA34-0003
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GA34-0003-7Your comments, please ..
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I 111111111111111.1 I MEM II 1 1111
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