1113 NTERNATIONAL STANDARD (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXKAYHAPOAHAA OPFAHM3AUMR HO CTAHAAPTW3ALMWORGANISATION INTERNATIONALE DE NORMALISATION Information processing - Representation of the 7-bit coded character set on punched tape Traitement de I'information - Repreésentation sur bande perforee du jeu de caracteres codés a7elements Second edition - 1979-02-15 ISO 1113-1979 (E) UDC 681.327.44 : 681.3.04 Ref. No. ISO 1113-1979 (E) Descriptors:data processing,character sets,coded character sets,representation of characters,punched tapes,isO seven-bit codes. Price based on 2 pages FOREWORD ISo (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing International Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO 1113 3 was developed byTechnical Committee ISO/TC97， Computersand informationprocessing. Thissecondeditionwas circulated to the member bodies in February 1978. It has been approved by the member bodies of the following countries : Australia Germany, F. R South Africa, Rep. of Belgium Iran Spain Brazil Italy Switzeriand Canada Japan Turkey Czechoslovakia Netherlands United Kingdom Denmark Poland U.S.S.R. France Romania No member body expressed disapproval of the document. This second edition cancels and replaces the first edition (IS 1113-1973) @InternationalOrganizationforStandardization,1979 Printed in Switzerland INTERNATIONAL STANDARD ISO 1113-1979 (E) Information processing -- Representation of the 7-bit coded character set on punched tape 1SCOPEANDFIELDOFAPPLICATION 3.2.2 Numbering of the code tracks ThisInternational Standard specifies the representation Thecodetracksshallbenumberedconsecutivelyfrom1to of the 7-bit coded character set on punched tape 25,4 mm 8 starting from the reference edge. The feed hole track shall (1 in) wide. be between code tracks 3 and 4. 2 REFERENCES 3.3 Character set IsO 646, 7-bit coded character set for information The character set shall be the 7-bit character set specified processing interchange. inISO646. ISO1154, Information processing-Punched paper tape- Dimensionsandlocationsoffeedholesandcodeholes. 3.4 Representation of coded characters Iso 1729, Information processing - Unpunched paper tape - Specification. 3.4.1 Each position where a code hole can be punched shalf be assigned tothe representation of a bit.The absence of a hole shall represent binary ZERO. The presence of 3 SPECIFICATIONS a hole shall represent binary ONE. (See also figures 1 and 2.) 3.4.2 Each transverse row of holes shall contain the 3.1 Punched tape representation of onlyone characterwith itsparitybit. The tape to be used (of paper or other material) shall 3.4.3 Bits b, to b, of a character from the 7-bit code correspond to the requirements in isO 1729 regarding the table shall be assigned respectively to tracks 1 to 7. physical characteristics of 25,4 mm (1 in) wide punched tape. 3.5Paritybit 3.2 Layout of the tracks To allow protection against errors in the tape punching The tape shall contain a track of small holes constituting an extra bit called a "parity bit" shall be added to each coded character. afeed hole track,parallel totheedgesof the tape.On either side of this track there shall be respectively 3 and 5 This bit shall be placed in track 8.Its value shail be chosen code tracks in which holes may be punched. The positions sothatthenumberofbinaryONEsinthesamerowis and dimensions of the holes and thepositions of t