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ProcessorControllerOut Bus(16 - Bit Data Word)External SyncDataChanne lAdapterDigital & AnalogOutput BasicMax: 1DigitalMax: 7 digital output controls or AnalogOutput8 analog output controls or OutputControl 8 in any combination ControlDigitalOutputAdapterMax: 4DigitalOutputAdapterPrecisionVoltageReferenceMod 1 or 2Each PVRserves up to4 DAC's inone 1856•PrecisionVoltageReferenceMod 2BufferRegisterBufferRegisterBuf erRegisterDAC Mod 1(10- Bit)DAC Mod 2(10- Bit) (10- Bit)DAC Mod 3(13 - Bit)DAC Mod 4(13 - Bit) (13 - Bit)Electronic"Contact"OperatePulseOutputRegisterOutputAnalogDriverAmplifierAnalogDriverAmplifierAnalogDriverAmplifierAnalogDriverAmplifierAnalogDriverAmplifierAnalogDriverAmplifier16 Bits 16 Bits 16 BitsMax: 4 in any combination perdigital output adapterMax: 16 analog output points per analog output controlI17440CFigure 49. Digital-Analog Output Configurationcore storage data table. (The address and data wordare transferred by data channel operations.) Afterthe data word has been loaded , a ready signal indicatingthat data is available is sent to the externaltiming device. When the external device receivesthe ready signal, it reads the data and then sends async pulse to the data channel adapter. This syncpulse resets the ready signal and indicates that theexternal device is ready to receive more data. Thisindication initiates the loading of another data wordby data channel operations. After this loading, aready signal is again sent to the external device.The ready and sync exchange continue, andthe digital and analog output feature are interlockeduntil the word count is decreased to 0. However,the P-C program can continue to run while thedigital and analog output feature is interlocked.When the word count reaches 0, the addressed•output will have been loaded with the last word ofthe data table. A scan complete interrupt is thengiven if specified by the scan control bits. However,digital and analog output basic remain busyuntil an external sync pulse is received for thelast word.Operation Without External SyncOperation without external sync is initiated by anXIO initialize write with modifier bit 8 off. Digitalor analog output addresses are transferred to digi-124
tal and analog output basic. Data words are transferredto the addressed output by means of datachannel (cycle steal) operations.The operation proceeds at the maximum rate ofthe data channel (core storage cycle time) unless ahigher priority data channel request is honored.Once started, a digital or analog output operationwithout external sync continues to completion bymeans of continuous data channel operations. Therefore,the P-C is essentially locked out from programexecution until the operation is completed.DIGITAL OUTPUT POINTSThree types of digital output points are available:electronic "contact" operate, pulse output, andregister output. For physical planning specificationssee IBM 1800 Installation Manual -- PhysicalPlanning, Order No. GA26-5922.Electronic "Contact" OperateThis type of digital output is used to operate alarms,console lights, and console displays as well as processequipment such as relays, solenoid valves, andde motors. Electronic "contact" operate is availablein modular groups of 16 points up to the system limitof 104 groups. The 16 points of a group are set by adata transfer from core storage to the 16-bit registerfor the group. Once set, the information in the outputregister remains until changed by another datatransfer to that group.A data bit of 1 corresponds to closed (conducting);a data bit of 0 corresponds to open (nonconducting).The 16 output points (0 through 15) correspond tocore storage word bit positions 0 through 15, respectively.Process operator console output devices such aslights, digital displays, and other low speed devicescan be operated by using a single electronic "contact"operate group as an output channel to the devices.Process operator console devices and cabling areavailable on a Request for Price Quotation (RPQ)basis.Pulse OutputThis type of digital output is used primarily to providepulse trains for operation of devices such aselectronic latches, set point positioners, and otherstepping motor devices. Pulse output is available inmodular groups of 16 points up to the system limitof 104 groups. The 16 points of a group are set by adata transfer from core storage to the 16-bit registerfor the group.A data bit of 1 corresponds to closed (conducting);a data bit of 0 corresponds to open (nonconducting).The 16 output points (0 through 15) correspond tocore storage word bit positions 0 through 15, respectively.Pulse output is similar to electronic "contact"operate except for duration of the contact closure.The 16 output points of each group are immediatelyset to their respective conditions (open orclosed) when the output register for each group isloaded. Output points in all groups are simultaneouslyreset (opened) by the timeout of a 3-ms timer.The timer is started by using a separate XIO control.In this manner, pulse chains are accomplishedby programming.The effective duration of the contact closure canbe increased by loading the 16-bit register beforethe 3-ms timer is started. Likewise, this durationcan be decreased by loading the register after thetimer is started.Register OutputThis type of digital output is used in register-toregistertransfer applications, such as transferringdata from the P-C to telemetry registers. Registeroutput is available in modular groups of 16 pointseach up to the system limit of 104 groups. The 16points of a group are set by data transfer from corestorage to the 16-bit output register for the group.The 16 output points (0 through 15) correspond tocore storage word bit positions 0 through 15, respectively.Once set, the information in the output registerremains until changed by another data transfer.IBM 1856 ANALOG OUTPUT TERMINALThe 1856 Analog Output Terminal is a modular chasisin which analog output control and digital-to-analogconverters (DAC's) are housed. The 1856 is mountedin an 1828 Enclosure. Up to sixteen 1856's can beinstalled in an 1800 system.Two models of the 1856 exist. Model 1 provideshousing and power for as many as four DAC 's andone analog output control. The analog output controloperates as many as eight DAC 's. Model 2 provideshousing and power for as many as four DAC 's, butdoes not contain an analog output control. The DAC 'sin a model 2 are controlled by analog output controlin the model 1. Therefore, a model 1 is requiredfor each model 2.DIGITAL-TO-ANALOG CONVERTER (DAC)The digital-to-analog converter (DAC) developsanalog voltage output from digital input values. Aprecision reference voltage is required to supply theDigital and Analog Output 125
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File No. 1800-01Order No. GA26-5918
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ContentsINTRODUCTION 1SYSTEM DESCRI
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Thermocouple Conversion ExampleConv
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Status Character 2412790 ADAPTER PR
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Processor - ControllerCoreStorageOu
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Page of GA26-5918-8Revised July 14,
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egister or the index register speci
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Short InstructionDDOne WordInstruct
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Instruction SetThe 1800 system inst
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LOAD ACCUMULATOR (LD)FORMATS oitamw
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STORE ACCUMULATOR (STO)FORMATSF 0 O
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LOAD INDEX (LDX)0 OP F T Disp 151 0
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STORE STATUS (STS) Store Status Fun
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LOAD STATUS (LDS)117165 A1DESCRIPTI
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SUBTRACT DOUBLE (SD).fartzaielTmEas
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DIVIDE (D)FORMATS0 OP F T DispF T I
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LOGICAL EXCLUSIVE OR (EOR)'FORMATS
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SHIFT LEFT A AND Q (SLT)altkae..,.:
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SHIFT RIGHT LOGICAL A (SRA)FORMAT s
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ROTATE RIGHT A AND Q (RTE)FORMAT ta
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BRANCH OR SKIP ON CONDITION (BSC OR
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a4.-4KA4rE4.7.9.4.&.4VA/M4:14/24...
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',V.71..1.41VV4-02,P2A,V4,1%1,L—N
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COMPARE (CMP)FORMATS0 OP F T Disp 1
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MachineCyclesAUGEND (A-reg) and ADD
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chain is accomplished as follows: T
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InterruptTo allow for coordination
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After a request for service has bee
Page 82 and 83: 2. The forced BSI with indirect add
Page 84 and 85: Storage ProtectionStorage protectio
Page 86 and 87: Page of GA26-5918-8Revised January
Page 88 and 89: Processor-Controller ConsoleThe pro
Page 90 and 91: 117674,Figure 23. Console Pushbutto
Page 92 and 93: Page of GA26-5918-8Revised July 14,
Page 96 and 97: DATA FLOW DISPLAYSSix rows of light
Page 98 and 99: This command causes the console int
Page 100 and 101: High -LevelHigh -Level Low-LevelLow
Page 104 and 105: CUSTOM ELEMENT: This element is ava
Page 106 and 107: The clock stop period does not dire
Page 108 and 109: Numberingwithin 18511851's withMult
Page 110 and 111: selected analog signal to a digital
Page 114 and 115: 0 1 2 3 4 5 8 7 0 9 10 14 15Indicat
Page 116 and 117: Direct Program Control Operations P
Page 118 and 119: Temp TempF C1652° 9001472° 81292
Page 120 and 121: 2. Determine the ADC reading (Q val
Page 122 and 123: Digital InputDigital input features
Page 124 and 125: ead operation without external sync
Page 126 and 127: AdapterFirstSecondThirdFourthFifthS
Page 128 and 129: the next input group address (conta
Page 130 and 131: status word (PISW), the PISW is rea
Page 134 and 135: DAC reference voltage used in devel
Page 136 and 137: 126 is assigned to the second group
Page 138 and 139: The input/output control command (I
Page 142 and 143: 1053/1816 Printer IOCC'sCE ModeSpec
Page 144 and 145: Keyboard entries are not printed au
Page 146 and 147: error is detected, the program may
Page 148 and 149: the keyboard into a storage-protect
Page 150 and 151: Channel••• ••••• 14
Page 152 and 153: READER ANY ERROR: This indicator tu
Page 156 and 157: Even-Numbered ColumnsOdd-Numbered C
Page 158 and 159: 1442 DSW Interrupt IndicatorsFigure
Page 160 and 161: The preceding examples show that if
Page 162 and 163: CharHexCore Storage BitsTypebar2 5
Page 166 and 167: CE PRINTER BUSY: When the 1443 is i
Page 168 and 169: DrumDownDRUM FAST RUN: This switch
Page 170 and 171: 1627 DSW Noninterrupt IndicatorsFig
Page 172 and 173: 120255A1Each track is divided into
Page 174 and 175: This command places the disk storag
Page 176 and 177: ANY ERROR: This indicator turns on
Page 178 and 179: LogicalDataRecordIBGapLRCIBGap.._01
Page 180 and 181: A tape mark read from seven-track t
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Modifier bits perform the five func
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an XIO initialize read operation wi
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Communications AdapterINTRODUCTIONT
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character (bit positions 0 through
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Bit PositionsP, 7, 6, 54, 3, 2, 100
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Standard replies as well as NAK cau
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either seeking characters received
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CA IOCC'sInitialize Write0 15 0 4 8
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TIMEOUT: This indicator turns on, c
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0 I 2 3 4 5 6 7 8 9 10 11 i2 13 14
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ETB, ETX, AND ENQ: These characters
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.■••.0■-3toCOc.nroz0F21.0fa
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Selector ChannelThe selector channe
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CCW Word 1 CCW Word 2 CCW Word 315B
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limited to the number of sense byte
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CSW Word 1 CSW Word 2 CSW Word 3 CS
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CSW Word 2 CSW Word 3CSW Word 40 3
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Termination of an operation with a
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Device end, when subsequently provi
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System /360 AdapterINTRODUCTIONThe
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specified by the channel command wo
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ATTENTION: This status indicates th
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HALT: This bit turns on, causing an
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Start Byte AS Address Byte Device A
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Read data request causes the adapte
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If a 1053 Printer is addressed by t
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specific 16-word block within the c
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LCCBWord1Address Word(Active Frame)
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channel active is interrogated. If
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Form GA26-5918-8Page Revised 10/1/7
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AREA STATION LOCAL I/O TRANSACTION
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244Form GA26-5918-8Page Added 10/1/
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When all segments are bypassed modi
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0. It can occur only during a read
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HexadecimalValueDouble Compare (DCM
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Appendix B. I/O Device AddressingTh
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1054 AND 1055 PAPER TAPEWRITE: Punc
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INITIALIZE WRITE: Move contents of
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INITIALIZE READ: Move tape data to
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AREA FEATURE 0 1 2 3 4 5 6 7 8 9•
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Clear (Continued)Storage (Continued
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Converting Thermocouple Characteris
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4Input/Output Control (Continued)On
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Loop Channel (Continued)Control Blo
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Pulse OutputDescription of 125Timer
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Storage ProtectBit (S) 10Bit Light
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1053 Printer (Continued)Maximum Rat
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1810 Disk Storage (Continued)Read/W
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IBM Technical Newsletter File Numbe
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^;``
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• READER'S COMMENT FORM•▪ IBM
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• READER'S COMMENT FORM• IBM 18
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• READER'S COMMENT FORM• IBM 18
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