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This charset is the IBM's external binary coded decimal for interchange
coding. This is an eight bits code. The following three variants were
implemented in GNU recode independently of RFC 1345:
EBCDIC
recode us:ebcdic conversion is identical to GNU
dd ebcdic conversion, and recode ebcdic:us
conversion is identical to GNU dd ascii conversion. This
charset also represents the way Control Data Corporation relates EBCDIC
to 8-bits ASCII.
EBCDIC-CCC
recode us:ebcdic-ccc or ebcdic-ccc:us
conversions represent the way Concurrent Computer Corporation (formerly
Perkin Elmer) relates EBCDIC to 8-bits ASCII.
EBCDIC-IBM
recode us:ebcdic-ibm conversion is almost
identical to GNU dd ibm conversion. Given the exact
dd ibm conversion table, recode once said:
Codes 91 and 213 both recode to 173 Codes 93 and 229 both recode to 189 No character recodes to 74 No character recodes to 106
So I arbitrarily chose to recode 213 by 74 and 229 by 106. This makes
the EBCDIC-IBM recoding reversible, but this is not necessarily
the best correction. In any case, I believe GNU dd should be
corrected, and preferably, GNU dd and GNU recode should
agree on the same correction. So, this table may change once again.
RFC 1345 brings in recode 15 other EBCDIC charsets, and 21 other
charsets having EBCDIC in at least one of their alias names. You can
get a list of all these by executing:
recode -l | grep ebcdic
This charset is available in recode under the name IBM-PC.
There are a few discrepancies between this charset and the very similar
RFC 1345 charset ibm437, which have not been analyzed yet, so the
charsets are being kept separate for now. This might change in the
future.
The file was obtained or is aimed towards a PC microcomputer from IBM or any compatible. This is an eight-bit code.
This charset is available in recode under the name
Icon-QNX, with QNX as an acceptable alias.
The file is using Unisys' Icon way to represent diacritics with code 25 escape sequences, under the system QNX. This is a seven-bit code, even if eight-bit codes can flow through as part of IBM-PC charset.
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