[Info-vax] AlphaVM-free emulator with all additional peripheral components

[Bob Koehler]

In article <jve1ul$brn$1 at Iltempo.Update.UU.SE>, Johnny Billquist <bqt at softjar.se> writes:

> I might as well give the answer. It's the DECLL escape sequence, which 
> is used to control some lights on the keyboard.

   I have a test program which runs throught the LEDs on VT100.  I've
   run it on VT200, 300, and 400, a couple of hardware VT clones, and
   several software VT emulators.

   I don't recall a light on VT200 responding, but all those which were
   not VT100 accepted and ignored the sequences without error.

   So I just figured the lights were "virtual".