CER (Serbian: Цифарски Електронски Рачунар - "Digital Electronic Computer") model 12 was an third generation digital computer developed by Mihajlo Pupin Institute (Serbia) in 1971 and intended for "business and statistical data processing". However, manufacturer also stated, at the time, that having in mind its architecture and performance, it can also be used successfully in solving "wide array of scientific and technical issues". CER-12 consisted of multiple modules connected via wire wrap and connectors.

Central Unit

Primary memory
* Type: magnetic core memory
* Capacity: up to 8 modules, each consisting of 8 kilowords (1 word = 4 8-bit bytes).
* Speed: cycle time: 1 μs, access time 0.4 μs.

Arithmetic unit contains:
* 32-bit accumulator register
* two separate groups of eight 2-byte index registers
* single-byte adder supporting both binary and BCD addition (same unit is used for subtraction, multiplication and division had to be implemented in software)

Control Unit
Control unit contains a program counter and instruction registers. It fetches instructions and facilitates program flow. It supports single-operand instruction set and works with all 16 index registers of the arithmetic unit.

Interrupt System
Interrupt system of CER-12 consists of a number of dedicated registers and software. It supports up to 32 interrupt channels.

Control PanelControl panel of CER-12 allowed the operator to control and alter program flow and/or to eliminate errors detected detected by error-detection circuitry. It features a number of indicators and switches.

Operating system and other software

Following software was shipped with CER-12:

* Operating System
* "Symbolic programming language" and assembler (called "autocoder")
* Input/output subroutines
* A number of test programs
* COBOL and FORTRAN IV compilers
* Linear programming and PERT planning software
* A library of applications and subroutines


* 5-8 track, 500 characters per second punched tape reader PE 1001
* 5-8 track, 150 characters per second tape puncher PE 1501
* CDC 9432 magnetic disk drive as secondary storage (4,096,000 characters per 6-disk, 10-surface volume organized into 100 cylinders with sixteen 1536-bit (48 processor words) sectors; track-to-track seek: 30 ms; rotational latecy: 25 ms)
* IBM 1735 teleprinter
* ICL 667 line printer (725 lines per minute for 64-character set or 880 lines per minute for 50-character set)

ee also

* CER Computers
* Mihajlo Pupin Institute
* History of computer hardware in the SFRY

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • CER-22 — CER (Serbian: Цифарски Електронски Рачунар Digital Electronic Computer ) model 22 was a transistor based computer developed by Mihajlo Pupin Institute (Serbia) in 1967. It was originally intended for banking applications and was used for data… …   Wikipedia

  • CER-10 — CER (Serbian: Цифарски Електронски Рачунар Digital Electronic Computer ) model 10 was a vacuum tube and transistor based computer developed by Mihajlo Pupin Institute (Serbia) in 1960 (4),(5)] . This was the first computer ever… …   Wikipedia

  • čer — čer̃ interj., čer 1. džer (žvangėjimui, tarškėjimui nusakyti): Kai mečiau akmenį į geležis, tik čer čer! Gs. Ižas užsidėjęs ant ledo, tai, kai eini, čer̃ čer̃ čirkši Kp. 2. čir, čar (skardžiam paukščio ar žvėrelio riktelėjimui nusakyti):… …   Dictionary of the Lithuanian Language

  • Cer — or CER may refer to: Cer (mountain), a mountain in Serbia Cer (goddess), Greek goddess of violent death, one of the Protogenoi Canonical Encoding Rules, a set of ASN.1 encoding rules for formatting data in binary Centre for European Reform… …   Wikipedia

  • CER — steht für: Cer, ein chemisches Element Cer (Gebirge), ein Gebirge in Serbien Schlacht von Cer, eine Schlacht im 1. Weltkrieg CER steht für: Certified Emission Reduction (zertifizierte Emissionsreduktion), offizielle Bezeichnung von… …   Deutsch Wikipedia

  • cér- — ⇒CÉR(É) , CÉR(I) , CÉR(O) , (CÉR , CÉRÉ , CÉRI , CÉRO ), préf. Élément préf. tiré du gr. ou du lat. cera « cire » et servant à former des mots savants. I. Substantifs A. [La voyelle de liaison est o (mots formés à partir du gr. )]. 1. BOTANIQUE  …   Encyclopédie Universelle

  • Cer [2] — Cer. – Wird jetzt hauptsächlich verwendet als Zusatz zu Auerglühkörpermasse und zu der auch Auermetall genannten Legierung Cereisen, aus 70 Gewichtsteilen Cer und 30 Gewichtsteilen Eisen, die für Taschenfeuerzeuge gebraucht wird (s. Geleucht …   Lexikon der gesamten Technik

  • cer — cȅr m <N mn ovi, zb. cȇrje> DEFINICIJA bot. drvo Quercus cerris; cerovac, crni hrast ONOMASTIKA Céronja m. os. ime (narodno), zast.; hip.: Cére, Céro pr. (od imena ili češće etnici): Ceránac (Slavonija), Ceránčević (Vinkovci), Cèranić (180 …   Hrvatski jezični portal

  • cer — cer·am·byc·i·dae; cer·a·mog·ra·phy; cer·as; …   English syllables

  • cer — cer̃ interj. čer, čir (karaliuko balsui nusakyti): Cek cek cek, cer! – prabilo iš po lūžusio medžio karaliukas Mš …   Dictionary of the Lithuanian Language

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”