[GreenKeys] Automatic Carriage Return Line Feed for Model 15 & Model 19 Printers

[Jim Haynes]

On Mon, 30 Jan 2012, COURYHOUSE at aol.com wrote:
>  
> Also, I have a couple of other documents that may be of interest.  These are
> for Model 28 machines and deal with
> non-overline, automatic carriage return & line feed and unshift on space.

That reminds me of some work involving W6FFC.  He and friends had set
up an autostart net so they could send messages to unattended receivers.
Irv wasn't universally popular, so there were some pranksters who would
fire up on the autostart frequency and send nothing but line feeds, to
unroll all the paper in the machine.  So Irv came up with some stunt box
hacks to prevent that kind of vandalism.  I have one of the stunt boxes
somewhere around here, but don't remember exactly what the treatment was.
Maybe it's in one of those articles you have.  I remember it involved
having the machine do a LF when it received CR, which eliminated the
overline problem and also prevented line feeding on receipt of multiple
line feeds.  And then there was something to cause only a single line feed
in response to multiple CRs.

Jim W6JVE