[sdiy] Mac users - excellent keyboard similar to IBM

[René Schmitz]

There were many different types of 3270 (and compatible) Terminals.

However the operating system must had support for this.

A quick search revealed this:

http://www.columbia.edu/cu/computinghistory/3270.html

"Users are generally presented with forms to fill out. The user moves 
about the form with arrow, tab, and backtab keys, filling in and 
correcting the various fields, and then presses the Enter key when ready 
to submit the form to the mainframe. The mainframe receives a series of 
data elements tagged to identify which field they belong to. When the 
mainframe is not ready for input, it literally "locks" the keyboard."


Best,

  René


Am 31.05.2021 um 15:56 schrieb cheater cheater via Synth-diy:
> Nope, the IBM 3270 is a beam spring keyboard. I have one here at home.
> There is no conceivable locking mechanism. I think Rene is talking
> about a Model A or even Model 01 converted to TTY. Those keyboards
> used a drive shaft that propelled the keys forward, otherwise they
> felt "stuck". If the motor wasn't on, the drive cylinder was not
> moving, and the key wouldn't operate... but I don't know if it would
> feel "stuck". I don't remember which of the ancient IBM typewriters
> had a drive cylinder, but I knew half a year ago.
>
> On Mon, May 31, 2021 at 10:34 AM Vladimir Pantelic via Synth-diy
> <synth-diy at synth-diy.org> wrote:
>> On 31.05.21 10:17, René Schmitz wrote:
>>> They look similar to the keyboards used on mainframe terminals on an IBM
>>> System 370.
>> yes, that's the keyboard my Mom had at work, together with an IBM 3270
>> terminal. as a kid I was impressed that it had F1 - F12 and PF1 - PF24 :)
>>
>> And separate RETURN (as in next line) and ENTER (send the form to the
>> mainframe) keys.
>>
>> when she had to use my PC to work from home she asked me where my ENTER
>> (send form) key was - eventually we found out it was mapped to F3 for
>> measly PC users...
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