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- Newsgroups: comp.mail.mime
- Path: sparky!uunet!utcsri!torn!newshub.ccs.yorku.ca!yorku.ca!davecb
- From: davecb@nexus.yorku.ca (David Collier-Brown)
- Subject: Re: X.400 and multimedia mail
- Message-ID: <davecb.724130413@yorku.ca>
- Sender: news@newshub.ccs.yorku.ca (USENET News System)
- Organization: York University
- References: <davecb.724004446@yorku.ca> <1992Dec11.153138.2198@ericsson.se> <1galsqINNr88@gap.caltech.edu> <1992Dec11.201947.17868@infodev.cam.ac.uk>
- Date: Sat, 12 Dec 1992 03:20:13 GMT
- Lines: 35
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- |In article <1galsqINNr88@gap.caltech.edu> jack@ccsf.caltech.edu (Jack Stewart) writes:
- |>As I understand, the main reason for MIME to use base64 encoding (as
- |>opposed to uuencode, 8bit transparent, XDR, or BER ) was that they
- |>needed an encoded scheme that would remain uncorrupted accross all
- |>platforms and architectures and existing mailers. Apparently this is
- |>a real problem with IBM VM/CMS machines. base64 encoding was the only
- |>thing that would survive these machines. Hopefully these machines
- |>will go away some day and then we can use a more reasonable encoding
- |>mechanism.
-
- ag129@cus.cam.ac.uk (Alasdair Grant) writes:
- |Yes, but this is a minor problem compared to the presence of machines
- |which use the 7-bit American ASCII code, where the top bit is a parity
- |bit.
-
- Since no-one buys GCOS anymore, who cares? (half a (:-)).
-
- Seriously, though, there are very few machines still in existance which have
- a byte size of 6 bits or less. Given that common communications channels
- are 8-bit, it is reasonable to expect that an 8-bit-clean smtp path and
- an 8-bit-clean file system will allow the elimination of 7-bit ascii as
- soon as it's worth the vendors' while. 16-bit is the real problem.
-
- --dave
- [ps: Honeywell, IBM 7070s and DEC-10s ran to 36-bit words, and tended
- to use 6-bit almost-ascii codes. Honeybuns actually could store
- strings of 7-bit characters, assuming you really, truly, wanted to.
- Sane honeybuns ran Multics, however, and used 9-bit bytes. --dave]
- --
- David Collier-Brown, | davecb@CCS.YorkU.CA | lethe!dave
- 72 Abitibi Ave., |
- Willowdale, Ontario, | York Postmaster and
- CANADA. 416-223-8968 | occasional sendfail(8) consultant.
-