ASMO 449

ASMO 449

Alias(es)	iso-ir-89
Standard	ASMO 449, ISO 9036
Classification	7-bit encoding,non-Latin ISO 646 modificationwith natural letter ordering
Succeeded by	ASMO 708(ISO-8859-6)

ASMO 449is a, nowtechnologically obsolete,7-bit codedcharacter setto encode theArabiclanguage.

History

This character set was devised by the now extinctArab Standardization and Metrology Organizationin 1982to be the 7-bit standard to be used in Arabic-speaking countries. The design of this character set is derivedfrom the 7-bitISO 646(version of 1973) but with modifications suited for the Arabic language. In code points ranging from 0x41 to 0x72 (hexadecimal), Latin letters were replaced with Arabic letters. Punctuation marks which were identical in the Latin and Arabic scripts remained the same, but where they differed (comma, semicolon, question mark), the Latin ones were replaced by Arabic ones. Only nominal letters are encoded, no preshaped forms of the letters, so shaping processing is required for display. This character set is not bidirectional and was intended to be used in right to left writing. Therefore, symmetrical pairs of punctuation marks ((and),<and>,[and],{and}) appear reversed ()and(,>and<,]and[,}and{).

ASMO 449 was registered in theInternational Register of Coded Character SetsasIR 089in 1985 and approved as anISO standardasISO 9036:1987 Information processing - Arabic 7-bit coded character set for information interchange.

Character set

ASMO 449 (1982)

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0x

NUL

SOH

STX

ETX

EOT

ENQ

ACK

BEL

BS

HT

LF

VT

FF

CR

SO

SI

1x

DLE

DC1

DC2

DC3

DC4

NAK

SYN

ETB

CAN

EM

SUB

ESC

FS

GS

RS

US

2x

SP

!

"

#

¤

%

&

'

)

(

*

+

،

-

.

/

3x

0

1

2

3

4

5

6

7

8

9

:

؛

>

=

<

؟

4x

@

ء

آ

أ

ؤ

إ

ئ

ا

ب

ة

ت

ث

ج

ح

خ

د

5x

ذ

ر

ز

س

ش

ص

ض

ط

ظ

ع

غ

]

\

[

^

_

6x

ـ

ف

ق

ك

ل

م

ن

ه

و

ى

ي

ً

ٌ

ٍ

َ

ُ

7x

ِ

ّ

ْ

}

|

{

~

DEL

There is a variant, sometimes namedASMO 449+which adds the charactersNBSPin 0x75, "ﹳ" in 0x76, "لآ" in 0x77, "لأ" in 0x78, "لإ" in 0x79 and "لا" in 0x7A.

Relationship with other character sets

ASMO 449 is a 7-bit character set. Although some encodings allocate this 7-bit character set in the upper part of the 8-bit character set, it should not be confused withASMO 708.In the character sets that allocate ASMO 449 (or some variant of it) in the upper part of the 8-bit character set, the existence of apparently repeated characters is due to the fact that the characters in the lower part are for left-to-right script while the characters in the upper part are for right-to-left script. When ASMO 449 (or some variant of it) is allocated to the upper part of the 8-bit character set, it hasArabic digits.

• Al-Arabiadds the characters NBS in 0xF5, "-" in 0xF6, "÷" in 0xF7, "×" in 0xF8, "«" in 0xF9 and "»" in 0xFA, and replaces "ـ" with "`"; this character set is sometimes referred as Code Page 768 (not an official IBM code page).
• DEC'sDEC/8/ASMOhas the same repertoire and the same sequence of Arabic characters but dislocates them.
• HP'sArabic-8is also based on ASMO 449;
• Apple'sMacArabicadds French, German and Spanish characters in their typical code points fromMacRoman,and adds letters for Persian and Urdu.
• Apple'sMacFarsireplaces the Arabic digits from MacArabic with Persian ones.
• TheCode Table 7fromMARC-8allocates ASMO 449 in the lower part of the 8-bit character set and allocates the upper part with the Arabic Extension (ISO 11822/ IR 224).
• Microsoft'sCode page 709,for MS-DOS, adds French and German characters in their typical code points fromcode page 437.

External links

• giconva graphical interface to a patchedlibiconvversion that recodes ASMO449+ toUTF-8
• ISO 9036:1987 Information processing — Arabic 7-bit coded character set for information interchange