[GreenKeys] Selectric Printer

[Dave Horsfall]

On Sun, 23 Nov 2014, Christian Gauger-Cosgrove wrote:

> ---> Unlike a Model 33 or Model 35 Teletype, the Selectric terminals 
> were half-duplex; further the 2741 (I'm not sure of the 1052) used a 
> "token-passing" like arrangement for communications; one end would send 
> an End of Text character which would allow the opposite end to begin 
> sending.

On the 360/50 that I used to drive, you had to get the OS's attention with 
the ATTN key (as I recall), and it would then unlock the keyboard.

> ---> 88-character typeball means the Selectric I, Selectric II, and 
> terminals like the 1052 and 2741 cannot "work" the full ASCII character 
> set; the 96-character typeball from the Selectric III (released in the 
> 1980s)

Somewhere, I still have an APL\360 goofball...

> the terminal Selectrics were built more robustly to take the "abuse" of 
> constant printing.

Yep, there was definitely the "secretary" version and the "printer" 
version.  Remember secretaries and typing pools?  It's where the single 
males used to hang out :-)

-- 
Dave Horsfall DTM (VK2KFU)  "Bliss is a MacBook with a FreeBSD server."
http://www.horsfall.org/spam.html (and check the home page whilst you're there)