*Registered Trademark Teletype Corp.

Series/1 1 6-bit architecture is de-signed to speed response, make thesystem adaptable to a variety ofrequirements and make input/outputdevices easy to add or change.

A unique cycle-steal channel inter-leaves I/O operations with process-ing to handle data at speeds up to1.6 megabytes per second. Up to 256devices are individually addressable.Many of these attached devices arecontrolled by their own microproces-sors, reducing the channel loadingon the main processor.

I/O devices are attached to the mainprocessor through I/O feature cardsthat plug into the processor or anadditional I/O Expansion Unit.

A tailored approach to softwareSeries/1 software consists of anextensive array of systems programsand program-support tools. Program-mers can select and implement onlythose functions required to meet theirapplication needs. For example, youcan choose from two operating sys-tems: The Realtime ProgrammingSystem or the Event Driven Executive.Both are intended for interactivemultiterminals, multitasking and multi-programming as well as batch appli-cations. A group of Control ProgramSupport programs is also available forthose who wish to develop applica-tions with a tailored control program.

The Series/1 software support forcommunications is designed to meeta broad range of requirements. Also anumber of program aids is availablefor earlier program development aswell as for unique system require-ments.

Build your kind of Systemfrom a remarkable variety oflow-cost hardware

IBM Series/1 is a unique combinationof low-cost, modular components.You select just those units that meetyour present needs. You can easilychange or add units at any time asyour needs change.

You have a wide variety of powerfulequipment units to choose from:processors .. . fixed and removablestorage media ... fast and efficientinput/output attachments ... plusattachment features that allow you touse non-IBM terminals and equip-ment such as plotters, Teletype* unitsand terminals.

Advanced technologyIn both hardware and software, yourSeries/1 benefits from some of IBM'smost advanced technology. Bothlogic and main memory circuits arefast, small and reliable. These circuitspack extra computing and storagecapacity on a few pluggable circuitcards that increase reliability, systemavailability and ease of servicing.

4954 model B Processor

4952 model C Processor

Larger Series/1 configuration Small Series/1 configuration

Three processors comein 10 models with optionalfeatures4952 ProcessorA low-cost, entry-level processor thatcombines CPU and 32KB to 128KB ofmain storage and a native timer in asingle circuit card. Available inthree models, it provides:

. 179 instructions• Instruction time of 9.3 microseconds,

average. Storage cycle of 2.1 microseconds. Channel data rate of 832KB/sec.

(max). Clock comparator. Optional integrated diskette unit

(model C)

4954 ProcessorA mid-range processor,available in three models,with internal performance approx-imately twice that of the4952, it provides:

• 179 Instructions• Instruction time of 4.5

microseconds average• Storage cycle of 1.4 microseconds. Channel data rate of 1.33

MB/sec. (max)• Storage of 64KB to 256KB• Clock/comparator• Optional integrated diskette

unit (model C).

4955 ProcessorThis high-performance, full-functionprocessor is available in four modelswith internal performance approx-imately 3.0 to 3.5 times that of the4952. It provides:

• 1 77 instructions• Storage of 32KB to 512KB• Instruction time of 2.65 micro-

seconds, average• Storage cycle of 660 nanoseconds• Channel data rate of 1.6MB/sec.

(max)• Storage protect.

Standard processor features:• 4 priority interrupt levels• 8 general-purpose registers per level• Direct addressing of 256 devices• Comprehensive error checking/

reporting• Power failure detect/auto-restart• Mountable in IBM or EIA standard

19" rack enclosures.

Optional features:• Storage Address Relocation Trans-

lator to permit addressing storageover 64KB (4955 model D only)

. Floating point provides 30 additionalinstructions and 16 64-bit registers(4954 and 4955 only)

• Programmer Console to aid testingand debugging.

4969 Magnetic Tape Subsystem

4965 Diskette Driveand I/O Expansion Unit

4964 Diskette Unit

With Series/1, you can choose from avariety of I/O units that offer disk,diskette, or magnetic tape storagedevices.

4962 Disk Storage UnitThis is a sealed, non-removable mag-netic disk protected from dust and dirtand operator mishandling. Capacity:9.3 or 13.9MB. Access time: 40 milli-seconds, average. Several models areavailable, including a combinationdisk/diskette unit. A fixed headoption on two models allows highspeed scan to frequently used data.

4963 Disk SubsystemEight models are available, with capa-cities from 23 to 64MB. With one pri-mary and up to three expansion units,each 4963 can contain a total of258MB of online storage. Accesstime: 27 milliseconds, average. A sub-system microprocessor frees the mainprocessor from external data han-dling chores. Additional disk subsys-tems can be attached to a Series/1.

4964 Diskette UnitThis unit contains a removable, flex-ible diskette that can be used to loadprograms or transfer data into theSeries/1 or to other IBM diskettedevices. Capacity: up to 606KB.Access time: 40 milliseconds, trackto track.

4965 Diskette Driveand I/O Expansion UnitProvides one or two diskette drivesallowing for 1.2 or 2.4MB of diskettestorage. The unit also contains spacefor 4 additional I/O cards.

4966 Diskette Magazine UnitThis unit contains two diskette maga-zines—each with up to 10 diskettes-plus slots for three individual dis-kettes. At double density recording,each diskette can hold up to 1.2MB.Magazine capacity: 27.8MB. An effec-tive data file backup for most datasets.

4969 Magnetic Tape SubsystemThis is a family of high-performancemagnetic tape drives for load dumps,data interchange, archiving, journal-ing and similar applications. The 4969offers a range of speeds: 45 and 75IPS, at densities of 800 BPI, 1600 BPIor both. Up to four drives are availableon a single subsystem.

Three typesof auxiliary storage

4962 Disk Storage Unit

3101 Display Terminal

Versatile display unitsfor online computing

4978 Display Station

4979 Display Station

5251 Display Station

Series/1 gives you freedom to matchdisplays to the needs of your prob-lems. You can easily change them asyour needs change. Each device iscontrolled by its own external micro-processor contained on an I/O fea-ture card that plugs into the CPU I/Ochannel.

3101 Display TerminalThis tabletop display terminal con-sists of a keyboard with 87-keys anda 305mm (1 2 inch), 2000-characterscreen. Operator productivity fea-tures include facilities for troubledetermination and replacement ofworkstation elements for increasedavailability.

4978 Display StationThis tabletop display and separatekeyboard permits use of multiple key-board codes. It provides a cursor,scrolling and format control on a1920-character screen.

4979 Display StationThis is a combination tabletop displayand a keyboard with 66-keys, cursorand format control on a 1920-charac-ter screen.

5251 and 5252 Display StationsOn these advanced function displaystations, the keyboard includes 52alphabetic, 10 numeric and 34 specialcharacters. Models available includea 960-character screen and a 1920-character screen. The 5252 providestwo workstations, each with a 960-character screen. The 5251 and 5252are supported by the Realtime Pro-gramming System.

5256 Matrix Printer

4975 Matrix Printer

4973 Line Printer

3102 Printer

Prlnters in a rangeof speeds and features

3102 PrinterThis desk top general purpose,receive-only thermal printer attachesto a 3101 display terminal (not directlyto the Series/1). The 31 02 is bufferedand can print at 40 characters persecond. It provides hard copy of thecontents of the 31 01 screen either ona continuous basis, or uponcommands from the host or the 3101keyboard.

4973 Line PrinterThis free-standing impact-type printerprepares up to 132-character lines atsix or eight lines per inch. Two modelshave print speeds from 80 to 414 linesper minute . . . their own micro-processor control . . . and 48-, 64-or 96-character interchangeableprint belts.

4974 Matrix PrinterThis tabletop printer has a wire-matrixprint head. It prints a 132-characterline at six or eight lines per inch. Speedis 1 20 characters per second, bidirec-tional.

4975 Matrix PrinterTwo models of this tabletop printerprovide print speeds of 40 to 1 20cps.Both local and remote models areavailable. Choice of draft or text mode.

5256 Matrix PrinterThis tabletop printer has a wire-matrixprint head. It provides bidirectionalserial printing and is fully buffered.Other features include: 96-characterset. . . horizontal spacing of 10characters per line at six or eight linesper inch, vertical... speeds of 40, 80,120 characters/sec. This device issupported by the Realtime Program-ming System.

System support to addapplication versatility

4959 Input/Output UnitAn optional channel extension withspace for 1 4 additional I/O cards, the4959 makes it possible to switchdevices between primary and secon-dary processors. Multiple 4959s canbe used on a single system.

4982 Sensor Input/Output UnitThe 4982 provides for attachment ofup to eight I/O feature cards in a half-width unit, for digital and/or analogsensor devices.

4993 Series/1...System/370Termination EnclosureThe 4993 provides physical supportand mechanical connection of aSeries/1 and electrical termination toa System/370, 4300 or 303X channel.

4997 Rack EnclosureTwo sizes are available: 1.0 meter high(39.37 inches) for two full-width units... or 1.8 meters high (70.9 inches)for four full-width units. A rack-mounting feature permits mountinghalf-width units.

4999 Battery Backup UnitThe 4999 provides automatic cutover to abattery-driven power supply if utilitypower fails (4955 and 4952/4954models A and B only).

User Attachment CardsThese feature cards are available forequipment listed below. They pluginto the processor or I/O ExpansionUnit and are well documented tofacilitate attachment of non-IBMequipment:

• Teletypewriter Adapter for Teletype*33/35 or equivalent device. Theadapter operates in full-duplex modeat speeds up to 9600 BPS.

• Integrated Digital I/O provides 32points of digital input and 32 points ofdigital output.

• Timers provide time of day to theoperating system and can be used tomeasure pulse duration or as pulsetimers. Two 1 6-bit timers per card andfive frequency options per timer areavailable. Timers operate under directprogram control.

• Customer Direct Program ControlAdapter permits attachment of up to16 addressable customer devices,with interrupt capability. It provides aparity option and 16-bit parallel inputand output data transfers.

• Channel Socket Adapter provides anIBM printed circuit card for a stan-dard connector. This is for those whowish to build an attachment that uti-lizes full cycle-steal and IPL channelcapability.

• General Purpose Interface BusinessAdapter provides an interfacefor OEM devices that meet IEEEStandard 488.

*Registered Trademark Teletype Corp.

Series/1 communications featuresare designed to meet a broad range ofrequirements for connecting theSeries/1 with a variety of terminalsand host systems.

Local Communications ControllerThis card provides the basis for con-necting multiple Series/1s in a ring.Applications can be developed thatrequire high-speed communicationbetween distributed systems.

Integrated CommunicationsFeaturesThese cards provide remote IPL andhigh-speed transmission insynchronous, binary synchronous,asynchronous or multi-line opera-tion. The cards plug into I/O slots inthe processor or expansion unit.

Programmable CommunicationsFeaturesThese features offer expanded versa-tility by allowing multiple-line disci-plines in a single communicationsunit. The features can also support awide variety of mixed terminal typesand offer a high degree ofadaptability.

Communicatlons for use withterminals or computers

4987 ProgrammableCommunications SubsystemA fully programmable communica-tions multiplexer that allows the useof Series/1 in a wide range of com-munications applications. The 4987provides attachment and control facil-ities for up to 32 lines per unit... andmultiple units can be contained in asingle Series/1 system.

The 4987 helps to make Series/1 avaluable tool for distributing data pro-cessing power to remote locations. Itprovides multiple line disciplines in asingle communications unit. Itsmicroprocessor control helps offloadthe Series/1 processor for communi-cations applications. The 4987extends the flexibility of Series/1 inproviding the ability to attach to non-IBM terminals and CPUs.

Through programming, the 4987 ishighly adaptable to growth require-ments. Program selectable featuresgive you extensive flexibility to per-sonalize a communications system.They also allow dynamic changes ofenvironment to meet changing appli-cation requirements with minimaleffect on processing programming.

Over and above the selectable fea-tures, the user has programmablestorage available in the 4987. A spe-cial communications oriented instruc-tion set is provided allowing for thefollowing functions remote to theSeries/1 processor:

• Protocol handling• Control character generation andrecognition

• Chaining of I/O operations•Timer functions• Autopolling of multipoint lines• Error retry functions• Break signal processing• Upper/lower case character recogni-tion and generation

• Autocalling.

This modular offering consists of:controllers, scanners, subsystemunits and device attachment features.Also available is an optional console.

IBM services to assurereliability and availability

Series/1 is backed up with extensiveIBM training courses for your operat-ing personnel. Formal classes andself-study programs can help prepareyour people to use the system beforeit is installed. Continuing educationcan help simplify expansion orchange after the system is installed.

IBM's highly trained Customer Engi-neers will install your Series/1 andperform extensive tests and diagnos-tics to give you a thoroughly checked-out system. Ongoing IBM mainte-nance is available at a monthly charge.

Customer Engineers are supportedby a unique IBM computer-basedparts inventory system that gets youneeded parts as quickly as possiblewhen they are not available locally.

Help in selecting the rightsystem for you

Remember, the IBM Series/1 is ahighly versatile general purpose com-puting system you can tailor to meetyour particular requirements.

Let's discuss how we can help youtailor a system to fit your needs fromthe extensive family of Series/1 offer-ings. See how Series/1 can provide amodular solution that you can adapteasily when your problems change.

Printed in U.S.A. G580-0269-04202

International Business Machines CorporationDepartment 7874111 Northside Parkway N.W.P.O. Box 2150Atlanta, Georgia 30055