18 Apr
2013
18 Apr
'13
5:14 p.m.
On Thu, 18 Apr 2013, Dave McGuire wrote:
Like other application-specific boards, they usually came with a driver
disk and likely a 3270-ish terminal program.
I wonder how they handled the extended keyboard buttons. Did they include
a keyboard? ;)
On 04/18/2013 02:42 AM, Cory Smelosky wrote:
Yes. Very scalable, and very flexible.
Yeah. Every time I think of IBM mainframe designs...I can't help but
wonder why microchannel for the microcomputer market never took off.
The 3270
hardware protocol uses coaxial cables and BNC connectors.
Upstream from terminals and printers are usually found "establishment
controllers", like 3174s, etc. They connect to a host (mainframe) via either
a LAN connection (Ethernet or token ring), serial bisync over a modem or
direct connection, parallel channel (an older high-speed IBM mainframe
controller interface), or some other method.
Interesting architecture! That interface board allows one to connect a PeeCee
(or a Mac, or whatever
it's for) to one of those establishment controllers.
I want to know more about these boards now, did software come with them?
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
--
Cory Smelosky
http://gewt.net/ Personal stuff
http://gimme-sympathy.org Experiments