Circa 1983-85. I'm pretty sure that Ted was showing off a Honeywell Level 6 and not a Microdata.
Ultimate's X calculations were based on the native speed of the cpu. Original Level 6, circa 1979-81 = 1x The 5x board came out in 1982-83. If I remember correctly, my tests showed the speed was more like 3-4 times faster. But you could add a bunch more terminals without slowing down. I never saw a 7x and don't know when it came out. We had one site that needed a 10x, but Ultimate and Honeywell Bull Germany couldn't keep the machine stable. So the site went to another platform. At least that's my 20 year old recollections. Roger > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Behalf Of Mark Johnson > Sent: Saturday, April 24, 2004 12:55 AM > To: U2 Users Discussion List > Subject: Re: How far can U2 scale? > > > A bit of history here. I'm sure that these high user counts all > participate > with telnet connections. Back in the day, I believe circa 1983-5, Ted > Sabarese, president of Ultimate, illustrated one of the highest number of > connected *serial* terminals on one system. It was an interesting > photograph > as he lined up 1,000 dumb terminals on the bleachers at a local > high school > and had them all BLOCK-PRINTing something like their port number. > > I don't exactly remember the machine's specs, but given the Microdatas of > that time it probably had 260MB disc drive, 8 MB of 'core' memory and the > latest '14x' processor. Boy, I wish I knew what those speeds of > those older > systems were in today's terms. 2x, 7x, 14x...What's an 'x'? IIRC, the > original IBM-PC was 4.7Mhz. > > My 4.7 cents. > > -- u2-users mailing list [EMAIL PROTECTED] http://www.oliver.com/mailman/listinfo/u2-users
