From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4311C930.80408@lanl.gov> Date: Sun, 28 Aug 2005 08:24:48 -0600 From: Ronald G Minnich User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050317) MIME-Version: 1.0 To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] Xen for Windows(Was:vmware 5.0) References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: 8082bed8-ead0-11e9-9d60-3106f5b1d025 another true story. IBM really knows emulation. At E.I. Dupont, where as a teenager I was a computer operator, we had (as of 1975) the last vacuum tube computer in the US. It was a 705 (NOT 704). It ran payroll. Oops, vacuum tubes were getting hard to get. So Dupont got a 7080 (NOT 7090). It emulated a 705. Oops, 7080 was expensive to maintain. So Dupont got a 360, emulates 7080, emulating 705. Oh, heck, 360 went off support. So, on our 370/158, we emulated 360, emulating 7080, emulating 705. This was really emulation! virtual card punches, virtual card readers! Then they rewrote the payroll system to run native. "I'm sure there are some bugs in there, but I can't find them," the programmer told me, on saturday at about 2 am. "We're going live next week". 2 weeks later, all us weekend dudes got a 4x-larger paycheck than we were supposed to. Geez, I hope nobody from Dupont comes after me for telling this story! ron