In <a6b9336cdb62bb46b9f8708e686a7ea00b038bb...@nrhmms8p02.uicnrh.dom>,
on 11/10/2011
at 11:48 AM, "McKown, John" <john.mck...@healthmarkets.com> said:
>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.
Not without a time machine. The 3274 came later. The original 3270
controller lineup was 3271, 3272 and 3275, the latter combining
controller and display.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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