Keyboards (in general)
tsw-cc at johana.com
Wed Nov 21 23:36:36 CST 2007
woodelf <bfranchuk at jetnet.ab.ca> wrote:
> der Mouse wrote:
> > I don't recall seeing a computer keyboard that *is* lowercase, ever.
> > Modern keyboards are generally connected to systems that map alphabetic
> > keystrokes to uppercase and lowercase depending on other state, and
> > have keys ("Shift") designed to provide that state, but the keyboards
> > themselves have only one case of alphabetic key, and in every case I
> > can recall seeing, that case is upper.
> I stand corrected ... the only keyboard without a shift key I have seen
> is a TTY's.
> > /~\ The ASCII der Mouse
> > \ / Ribbon Campaign
> > X Against HTML mouse at rodents.montreal.qc.ca
> > / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B
You are a bit mistaken. TTY's DID have shift keys. On the five level machines
(28, 32, etc.) there was a LETR and FIGS shift. On later machines, like the 33
and 35, there was an actual key labeled 'SHIFT'. While it didn't make upper
and lower case letters, it did take the alternate graphic on the keyboard. On
the 33/35 machines, it used a "bit paired" sequence where the difference
between the 'shift' and 'unshifted' code was 0x20. This led to some weird
pairings like '+' and ';'. Some shifts were locked out (zero might have
shifted to be space, and vice versa, but they were separate keys.
Later model devices, Teletype 37 comes to mind, had both upper and lower case.
Many early CRT terminals didn't have upper case letters either. The ADM-3 had
lower case as an option. Some of the portable Silent 700's (I remember having
one) didn't have lower case. Those that had lower case used 'miniature
letters' not ture lower case.
I'm sure there are other examples.
Keypunches are another catagory.
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