There was a product called the Yale IUP and later product version the 7171 Device Attachment Control Unit which "converted" ASCII displays (like the IBM 3101) into 3270 protocol devices. Later there was the 3174 Controller with the Asynchronous Emulator Adapter (AEA) which is what I think you are referring to, and it also emulated 3278 on ASCII.
Jim Elliott Senior IT Consultant - GlassHouse Systems Inc. On Tue, Mar 2, 2021 at 3:22 PM Paul Gilmartin <paulgboul...@aim.com> wrote: > On 2021-03-02, at 11:18:25, Fred Shaheen wrote: > > > > > > The ASCII controller was the 7171, developed by Dr. Wehrle's team in the > > Glendale Lab in the 1980's. > > > I believe that was a successor and embedded the "Yale ASCII" which > was based on an IBM Series 1 minicomputer. Those provided the > hardware base for IND$FILE and Columbia Kermit, which switched > modes with a valid but improbable sequence of 3278 control > bytes. > > I believe the 3174 AEA was different. But it may have embedded > 7171 firmware. > > > My car pool buddy at the time, Tom Murphy Jr. (the other Tom Murphy for > > those of you in VM) was the lead > > developer on that box. > > > > From: Paul Gilmartin > > Date: 03/02/2021 12:07 PM > > > > On 2021-03-02, at 09:38:54, Dave Jones wrote: > >> > >> I wonder how hard it would be for z/VM to emulate, or virtualize, a > >> VT220 type terminal? > >> > > In days of yore, there was a hardware solution. The 3174(?) > > Asynchronous Emulation Adapter. I don't remember the configuration > > I tried, but it made an (independent vendor) 3278 behave remarkably > > like a VT-220. > > -- gil > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or > visit > http://www2.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
