To: E who wrote (10326 ) 2/4/1998 10:56:00 AM From: John Mansfield Respond to of 31646
Subject: Re: Sighting - FAA Y2K on CNN.COM Reply-To: kiyoinc@ibm.XOUT.net (cory hamasaki) > >Say what??? A new generation of computers that can run 30+ year old >machine code from systems whose architectures have been obsolete for >decades? What are they going to do, write an emulator and debug it >before 1999/12/31? > >Or are they going to rewrite hundreds of thousands of lines of assembler >code by then? (Weren't these oldest FAA systems word-mark based instead >of using fixed length words? Weren't they also 6-bit machines?) > >After rereading the article, I have to admit in all fairness to IBM, >they did not say anything about these computers being able to run the >existing or rewritten software in time... is this slick marketing or >what? > >"Yes boss, the new computers are DEFINITELY Y2K compliant, but we don't >have any ATC software that will run on them!" > >Jon Kibler This is my understanding. I have never seen the FAA systems or the source code. The original ATC system was implemented on modified S/360 model 50's. Sometime in the 1980s the software was rehosted on 3083's a single engine, water cooled, S/370. The 3083, any S/370, can run S/360 code with some restrictions. There is some kind of Y2K flaw in the 3083. I've been told that no 308x will IPL after Dec 31, 1999. I haven't confirmed that. IBM is proposing to replace the 3083 with some kind of S/390, possibly a 9121 although a 9672 would be a better investment. This doesn't solve any software flaw in the ATC system. It simply gives the FAA a hardware platform that will IPL and run. If I had more information on the FAA systems, I could provide a better assessment. cory hamasaki