Daisywhell typewriter emulating a TTY

Dave Babcock dave at babcock-family.org
Wed Apr 10 11:54:30 CDT 2019

To all,

The Computer History Museum's IBM 1620 Jr. project has already done 
this.  We have converted an IBM Wheelwriter 1000 electric typewriter 
into a computer terminal.  The conversion consists of a custom PCB with 
an Arduino Teensy 3.5 microcontroller which is physically installed in 
the typewriter, electrically in-between the keyboard and typewriter 
motherboard, with custom firmware.

The initial work was to create a robust substitute for the IBM 1620's 
console typewriter.  However, software changes are being completed this 
month to extend it into a general-purpose, easily-adapted, ASCII 

We demoed the device as part of our VCF West display last August at 
which we took 1st Place in Best of Show and 2nd Place in 

We will be making all of our design files, software, and documentation 
available free to the classic computer community.

To whet your appetite, here's the step-by-step, illustrated guide for 
the physical conversion of the typewriter:

We'll be posting a formal announcement of this device within a few months.

This work has been done by Joe Fredrick, Steve Casner, and myself.


On 4/10/2019 9:24 AM, ED SHARPE via cctalk wrote:
> I  remember  in '79   a  KSR  Diablo  was   the  dream  KSR  printing  terminal  and   cost  like   3  grand? Oh  how  we  used  to  dream of having one of these  back then!
> We  do have  one in the museum's  collection...  although   have not attempted to power up  to use.
> Ed#
> In a message dated 4/10/2019 8:40:58 AM US Mountain Standard Time, cctalk at classiccmp.org writes:
> On 4/10/19 8:16 AM, Jon Elson via cctalk wrote:
>> On 04/10/2019 03:38 AM, GerardCJAT via cctalk wrote:
>>> I would like to emulate a TTY, using a daisywheel typewriter.
>> Well, there are Qume and Diablo.  Diablo was bought by Xerox, so some of
>> them carry that label.
>> Most of the stand-alone versions had serial (RS-232) ASCII interface.
> I've given a couple of the Diablo KSRs (that's what the Hitypes with the
> keyboard were known as).  I didn't care for them much--no immediacy of
> sound and keypress--the two seem unrelated.
> Daisywheel printers are incredibly difficult to get rid of--nobody wants
> to pay shipping.  I got rid of the last one by throwing in a complete
> system with it.  Still have a NEC Spinwriter mouldering away.
> --Chuck

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