Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utcs!utfyzx!oscvax!rico From: rico@oscvax.UUCP Newsgroups: comp.sys.amiga Subject: Compressing with less than 16 bits Message-ID: <470@oscvax.UUCP> Date: Mon, 12-Jan-87 09:29:57 EST Article-I.D.: oscvax.470 Posted: Mon Jan 12 09:29:57 1987 Date-Received: Tue, 13-Jan-87 19:42:24 EST References: <2280@well.UUCP> <340@oliveb.UUCP> <8232@topaz.RUTGERS.EDU> <2880@j.cc.purdue.edu> <5090@amdahl.UUCP> Reply-To: rico@oscvax.UUCP (Rico Mariani) Organization: Ontario Science Centre, Toronto Lines: 45 Summary: Works if you use the -b flag on host before downloading to micro In article <5090@amdahl.UUCP> kim@amdahl.UUCP writes: > ... [lots of interesting stuff] ... >There are some other possible problems in using either ARC or Compress. >Compress is usually compiled in 12-bit mode for use on micros due to >memory size limitations. On UNIX(R) boxes like VAXen (and Amdahl's :-) ), >Compress is compiled for 16-bit compression mode. I do not believe you >can uncompress a 16-bit compressed file with a 12-bit compiled program. >So one may run into some problems using compress depending on where one >does the compress and uncompress. Also, Compress is not part of the >standard System V release package to my knowledge, so a significant number >of sites mat *not* have it. The compress on Fish disk #6 uses 14 bits rather than the full 16. This doesn't really pose a big problem since you can instruct your host computer to use less of the bits when you compress. i.e. on the host: you receive file foo.Z.uu by news or whatever uudecode foo.Z.uu uncompress foo.Z compress -b 14 foo download to your micro using your favourite protocol \. _\\ \ _\ \\ `\ on your micro: uncompress foo.Z I use the last three steps w/ kermit (image transfers of course) all the time. I'm not sure about the SYS V sites problem, but there are a zillion versions of compress floating around so I think that many (most?) SYS V sites would have some version or another of compress. -Rico -- [NSA food: terrorist, cryptography, DES, drugs, CIA, secret, decode, foo] [CSIS food: supermailbox, tuna, fiberglass coffins, Mirabel, microfiche] [Cat food: Nine Lives, Purina, Meow Mix, Crave]