ISO 9661:1988/Cor 2:1992

Information processing — Data interchange on 12,7 mm (0.5 in) magnetic tape cartridges — 18 tracks, 1 491 data bytes per millimetre (37 871 data bytes per inch) — Technical Corrigendum 2

Traitement de l'information — Échange d'information sur cartouche de bande magnétique de 12,7 mm de large (0,5 in) — 18 pistes, 1 491 caractères par millimètre (37 871 caractères par inch) — Rectificatif technique 2

General Information

• Status: Withdrawn
• Publication Date: 26-Feb-1992
• Withdrawal Date: 26-Feb-1992
• ICS: 35.220.20 - Magnetic storage devices in general
• Technical Committee: ISO/IEC JTC 1 - Information technology
• Drafting Committee: ISO/IEC JTC 1 - Information technology
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 22-Dec-1994

Relations

• Revised: ISO/IEC 9661:1994 - Information technology — Data interchange on 12,7 mm wide magnetic tape cartridges — 18 tracks, 1 491 data bytes per millimetre
• Effective Date: 15-Apr-2008
• Corrects: ISO 9661:1988 - Information processing — Data interchange on 12,7 mm (0.5 in) magnetic tape cartridges — 18 tracks, 1 491 data bytes per millimetre (37 871 data bytes per inch)
• Effective Date: 06-Jun-2022
• Child: ISO 9661:1988 - Information processing — Data interchange on 12,7 mm (0.5 in) magnetic tape cartridges — 18 tracks, 1 491 data bytes per millimetre (37 871 data bytes per inch)
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL STANDARD IS0 9661 : 1988
TECHNICAL CORRIGENDUM 2
Published 1992-03-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. MEXflYHAPOAHAfl OPrAHMBAUMfl fl0 CTAHAAPTMBAUMM ORGANISATION INTERNATIONALE DE NORMALISATION
Information processing - Data interchange on 12,7 mm
(0.5 in) wide magnetic tape cartridges - 18 tracks,
1 491 data bytes per millimetre (37 871 data bytes per inch)
TECHNICAL CORRIGENDUM 2
I*' Traitement de I'information - Échange d'information sur cartouche de bande magnétique de 12,7 mm de large (0,5 in) -
18 pistes, I 491 caractères par millimètre (37 871 caractères par inch)
RECTIFICATIF TECHNIQUE 2
Technical corrigendum 2 to International Standard IS0 9661 : 19% was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology.
Page iii
Contents
Item 3.1, insert "and" between "dimensional" and "mechanical".
I.0
Page iv
Contents
Delete item 4.3.1.3.
Renumber item 4.3.3.5 as 4.3.3.6 and insert new item as follows:
"4.3.3.5 Summary of requirementsfor Residual Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24'
Ref. No. IS0 9661 : 19881Cor.2 : 1992 (E)
UDC 681.32ï.636
Descriptors: data processing, information interchange, data recording devices, magnetic tapes, cassettes for magnetic tapes, specifications.
O ISO/IEC 1992
Printed in Switzerland

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Page 8
Subclause 3.1
In the sentence beginning "Figure 13 shows the same", replace "figure 11" with "figure 12".
Second paragraph, last sentence, replace "represented in third angle projection" with "presented. Third angle projection is used".
Page 20
Subclauses 4.3.1.1 and 4.3.1.1.1
Replace the text beginning with "Data Bytes are" in 4.3.1 .I and ending with "of the 8-bit Code (Is0 48731" in 4.3.1 .I .I with the
following (note the renumbering):
"Data bytes comprise User bytes and Block-ID bytes.
4.3.1.1.1 User bytes
User bytes are 8-bit bytes available for the recording of the information to be interchanged and/or stored.
Coded representation of character in user bytes
4.3.1.1.1.1
Characters shall be represented by means of the IS0 7-bit coded character set (ISO/IEC 646) and, where required, by its 7-bit exten-
sions (IS0 2022) or by means of the IS0 rules for 8-bit codes (ISO/IEC 48731.''
Subclauses 4.3.1.1.1 and 4.3.1.1.2
Replace the note in 4.3.1.1.1 and all of 4.3.1 .I .2 with the following text (note the renumbering):
"NOTE - If each character has a coded representation consisting of one single7-bit or 8-bit byte, the number of characters is equal to the number of
user bytes. Code extension techniques allow multiple-byte representation. In this case the number of characters is equal to the number of user bytes
divided by the number of bytes of the coded representation of a single character.
4.3.1.1.1.2 Representation of binary data in user bytes
~ When the coding method requires it, the coded representations to be recorded in user bytes shall be regarded as an ordered sequence
of bit positions, each containing a bit, which can be either a ZERO or a ONE.
The binary weights, bit designations and bit positions shall be given in 4.3.1.1.1.1 b) ."
Pages 20 and 21
Subclauses 4.3.1.2 and 4.3.1.3
Renumber subclause 4.3.1.3 as 4.3.1 .I .2 and move subclause 4.3.1.2 so as to follow new subclause 4.3.1.1.2.
Subclause 4.3.1.3, line 2, replace "last data byte" with "last user byte".
Page 22
Subclause 4.3.3
Replace the first sentence with the following :
"A Data Block shall contain at least 5 and at most 32 772 Data bytes."
Subclause 4.3.3.2
First line, add the words "(see figure 20)" after "shall consist of".
2

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IS0 9ô6l : 198WCor.2 : 1992 (E)
Figures 20 and 21, renumber figure 20 as figure 21 and vice versa. Swap the positions of the figures.
Second paragraph, add the words "(see figure 21)" after "in clusters as follows".
Page 23
Subclause 4.3.3.3
Repla
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