On 30 Jun 2008 11:01:24 -0700, in bit.listserv.ibm-main you wrote: >> -----Original Message----- >> From: IBM Mainframe Discussion List >> [mailto:[EMAIL PROTECTED] On Behalf Of Gary Green >> Sent: Monday, June 30, 2008 12:36 PM >> To: [email protected] >> Subject: Another difference between platforms... >> >> Back in the 80's we mainframe(rs) went from 24 bit to 31 bit, >> then towards the end of the millennium, we started migrating >> to 64 bit with the introduction of z/OS. During all this >> time I do not recall any of the applications we ran on the >> older platforms ever "going dark" because of the change. We >> all have a ton of stuff in our shop that was written decades >> ago and is still humming along just fine thank you. Then why >> is it every time Mickeysoft changes their platform, >> everything we were using must change or be left behind? >> >> http://www.computerworld.com/action/article.do?command=viewArt >> icleBasic&articleId=9103238&source=NLT_ES&nlid=42 >> >> Gary Green > >Enforced obsolescense! If the old apps continued to run on the new OS, >how would MS force people to upgrade to the new application software? >There is a lot of "chatter" than MS does this deliberately to force >people to buy new versions of MS Office when they get a new OS, which is >usually forced when they get new hardware. PROFIT! > >Personally, I think it is also because Windows is designed "ad hoc" with >no real stragetic planning. I've also heard that every MS programmer >things that they can do it better and so the API changes "as needed" >with no regard to backwards compatability.
IBM has obsolesced things. Anyone remember depending on TCAM. Burroughs and Unisys both have operating system upgrades that require recompilations. Apple has changed processors for its OS. IBM has made major changes in the System 38 / AS400 / i series that have required recompilations. On the other hand, we get the joys of IDCAMS still being 24 bit limited for at least some things (as are or at least were parts of TSO). Blind pursuit of backward compatibility has left us stuck with CKD even while most of the major logical methods of storage are FBA (VSAM, DB2, and PDSE). ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
