YouTube videos of vintage PDP-11/40, ASR-33, VT05, etc

[woodelf]

Tony Duell wrote:

> And while not a terminal, and while not triggeered by ^G, the HP9830 has 
> an electronic beeper used to signal errors. It's simply triggered by a 
> single line from the I/O interface PCB and things like the frequency and 
> dureation are set by r's and C's on the PCB, they're not software 
> controlled. But it shows the sort of design that when into these old HPs 
> when you realase there's a little circuit -- OK, just a couple of gates, 
> a trnasisotr, and a few passives -- to geenrate an amplitude envelope on 
> this beep to make it sound more pleasant. One machine where every cent 
> was _not_ saved...
> 
> -tony
I like a real bell.
PS. stupid HTML email ... you can't enter a CTL G. :(