Date   : Sat, 27 Jun 2009 11:14:17 +0100
From   : dl.harper@... (David Harper)
Subject: Only one beep

Sprow wrote:

> The low pitch "burr" is the unconfigured sound chip, ie. it'll make that
> sound even if you unplug the 6502.
> The OS silences this when the system 6522 is set up (since it hangs off
> the slow bus side of the 6522).
> The second "bip" sound is just a VDU 7 which is embedded in the string
> reporting the RAM size ("16K<7>" or "32K<7>"), which is why there is no
> "bip" on a soft break, because the RAM size is not printed.

Interestingly, the Master sends a "bip" on its own after the sign-on message 
if it is a hard break (and if it does not find a co-pro - in that case it 
lets the co-pro deliver the message (and co-pros do not usually send a 
VDU7)).

David Harper