Transcode (character encoding): Difference between revisions

Revision as of 23:59, 29 September 2019

Revision as of 00:37, 23 April 2021

Line 1:

{{Other uses|Transcode (disambiguation)}}

{{Use dmy dates|date=May 2019|cs1-dates=y}}

'''Six-Bit Transcode''', or ''Six-Bit Transmission Code'', iswas, for a noshort longertime, usedone 6-bitof plusthe parity [[BCD (6-bit)|BCD]]three [[character encoding|character setsets]] which was used by [[IBM]] for a short time for [[Binary Synchronous Communications|Binary Synchronous communications]]. Transmission Theusing [[IBM 2780]] data transmission terminal was announced with6-bit Transcode supporthad inhigher 1967.throughput than Thetransmission [[IBMusing 2780#3780|IBM8-bit 3780]]EBCDIC data communication terminal, the 2780 successor announced in 1972, dropped Transcodeor supportASCII.

The [[IBM 2780]] data transmission terminal was announced with Transcode support in 1967. Its successor, the [[IBM 2780#3780|IBM 3780]] data communication terminal, announced in 1972, dropped Transcode support.

Transcode was a 64 character set including twenty-six upper case alphabetic characters, ten numerics, thirteen special characters, and sixteen [[control characters]]. Characters were transmitted with [[odd parity]].<ref>{{cite book|last=IBM Corporation |title=Component Description: IBM 2780 Communications Terminal |year=1971 |url=http://computer-refuge.org/bitsavers/pdf/ibm/27xx/GA27-3005-3-2780_Data_Terminal_Description_Aug71.pdf |url-status=dead |archiveurl=https://web.archive.org/web/20110929024649/http://computer-refuge.org/bitsavers/pdf/ibm/27xx/GA27-3005-3-2780_Data_Terminal_Description_Aug71.pdf |archivedate=September 29, 2011 }}</ref>

Transcode wasis a 64[[six-bit character setcode]]. includingIt twenty-sixrelates upperto caseIBM's alphabetic[[punched characterscard code]] but, tenlike numerics[[EBCDIC]], thirteenit specialis charactersnot [[BCD (character encoding)|BCD]]. Its 64 values consist of the 26 uppercase letters, 10 numbers, 11 symbols, [[space (character)|space]], and sixteen16 [[control characterscharacter]]s. Characters wereare transmitted with [[odd parity]]. The 2780 cannot use the 16 control characters as data characters in Transcode mode.<ref>{{cite book |last=IBM Corporation |title=Component Description: IBM 2780 Communications Terminal |year=1971 |url=http://computer-refuge.org/bitsavers/pdf/ibm/27xx/GA27-3005-3-2780_Data_Terminal_Description_Aug71.pdf |url-status=dead |archiveurlarchive-url=https://web.archive.org/web/20110929024649/http://computer-refuge.org/bitsavers/pdf/ibm/27xx/GA27-3005-3-2780_Data_Terminal_Description_Aug71.pdf |archivedatearchive-date=September 29, 2011 }}</ref>

{| class="wikitable" style="font-family: 'Courier New';"

Line 138 ⟶ 140:

==Devices using Transcode==

* [[IBM 2701]] Data Adapter Unit.

* [[IBM 2703]] Transmission Control.

* [[IBM 2780/3780|IBM 2780]] Data Transmission Terminal.

* [[IBM System/370]] model 135 Integrated Communications Adapter (ICA).

==References==

{{Reflist}}

{{characterCharacter encodingencodings}}

[[Category:Character encoding]]