home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.arch
- Path: sparky!uunet!sun-barr!ames!agate!linus!aquila.sni-usa.com!news.sni.de!uranium!josef
- From: Josef Moellers <mollers.pad@sni.de>
- Subject: Re: What's in a name?
- Sender: josef@nixpbe.sni.de (Moellers)
- Message-ID: <josef.712480693@uranium>
- Date: Thu, 30 Jul 1992 07:18:13 GMT
- References: <1992Jul16.005016.25778@microsoft.com> <l6bu58INN4d1@spim.mips.com> <1992Jul17.220112.20995@microsoft.com> <1992Jul20.092822.7666@spool.cs.wisc.edu> <1992Jul21.040216.13502@primerd.prime.com> <1992Jul24.170249.26032@crd.ge.com>
- Organization: Siemens Nixdorf Info.Sys. AG, Paderborn, Germany
- Lines: 48
-
- In <1992Jul24.170249.26032@crd.ge.com> davidsen@ariel.crd.GE.COM (william E Davidsen) writes:
-
- >In article <1992Jul21.040216.13502@primerd.prime.com>, danw@hobbes.prime.com (Dan Westerberg) writes:
-
- >| If we were to say to our customers that their software would no longer be
- >| compatible with a new machine, we would quickly lose our installed customer
- >| base. At that time, it would make sense for a customer to begin investigating
- >| the benefits/tradeoffs associated with switching operations to an alternative
- >| hardware platform (be it another proprietary system or a Unix system).
-
- > Dan makes a great point here, backward compatibility is only an issue
- >if you are running proprietary software. For the person who has source
- >to his software, compatibility within an o/s (like UNIX) means
- >recompilation. To someone who is running software without source (most
- >commercial packages), the cost of changing processors is far higher. The
- >cost of upgrading the o/s may be pretty high, too.
-
- There's more to this than just the executables. But even then,
- recompilation isn't so very simple. Things that spring to my mind are:
- word size, signed vs. unsigned characters (in case Your compiler changes
- with the hardware, which it usually does), pointer alignment ...
- Then the differences in the operating system that might/will change.
- Perhaps the new architecture doesn't support Your ancient language
- ("Soory sir, wo don't do FORTRAN/IV any more")?
-
- The next, perhaps even more important, issue is the vast amount of data
- that You have on your disks/tapes/wherever. You'll have to convert these
- too, which may really be a pain in the a**.
-
- > Backward compatibility is very much a customer issue. As long as the
- >cost of the total system hardware and software is lower through backward
- >compatibility, the customer will want it.
-
- Everything in a commercial company is a customer issue, if You want to
- stay in business!
-
- > And to the extent that this affects purchasing decisions and forces
- >processors to comform to user's wishes, it's an architectural issue.
- >Perhaps we've beaten it to death, though.
- >--
- >bill davidsen, GE Corp. R&D Center; Box 8; Schenectady NY 12345
- > It never ceases to amaze me that otherwise rational people, able to
- > understand calculus, compound interest, and the income tax form, can
- > continue to believe that poker is a game of chance.
- --
- | Josef Moellers | c/o Siemens Nixdorf Informationssysteme AG |
- | USA: mollers.pad@sni-usa.com | Abt. STO-XS 113 | Riemekestrasse |
- | !USA: mollers.pad@sni.de | Phone: (+49) 5251 835124 | D-4790 Paderborn |
-