On Thu, Nov 10, 2011 at 11:48 AM, McKown, John <john.mck...@healthmarkets.com> wrote: > > Remember how old the 3270 architecture is. Wikipedia says about 1972. Think 1 > Mhz 8080 as "top of the line" micro processor. The original 3277 and its > controllers were STUPID. Rather than put a more powerful processor in the > controller, IBM decided to offload the "complicated" function of calculating > the position of the data into the host. Made of discrete transistors and > resistors! Very primitive. So, the host just sent a simple to understand > "buffer address" (a single number) to the 3274. It basically just starting > stuffing data characters at that location in a RAM buffer. More power == most > cost == fewer purchases. Much like some of the "krud" in z/OS today due to > "short sighted" architects who were worried about memory and slow CPUs and > expensive DASD. > > The answer to these problems is obvious: Convert from archaic z/OS to modern > Windows 8! At least that's what a lot of "Windows weenies" around here are > saying. Over and over and over and over. "Better! Faster!! Cheaper!!!" is > their cry. Anything z/OS can do, they state can be done using Windows and at > lower TCO. Herr Gobbles would be proud of them. > > -- > John McKown > Systems Engineer IV > IT
http://en.wikipedia.org/wiki/Intel_4004 1st microprocess in 1971, 740 kHz 2,300 transistors http://en.wikipedia.org/wiki/Intel_8008 April 1972 500-800 kHz 3,500 transistors http://en.wikipedia.org/wiki/Intel_8080 April 1974 2,000 kHz 6,000 transistors (CP/M 80 was designed for this processor, DR had CP/M 86 for the 8086 but didn't meet with IBM to put it on the IBM PC, so IBM hired Bill Gates to write DOS 1.0) And the original IBM 3270 screen size was Model 1, 12 lines by 40 characters. Model 2 (24 * 80) didn't come along until later. -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
