3M "WhisperPrinter" (Trendcom 100) docs?

[Fred Cisin]

On Sun, 30 Nov 2014, Josh Dersch wrote:
> Picked this up for nearly nothing at a local recycler, it was too cute
> to pass up.  It's a 3M "WhisperPrinter" (model 1904AA), and it's a small
> (40 column, 4.5" wide) thermal printer with a serial interface.  It

Are you sure?
I used to have several PARALLEL port Trendcom 100s.
Does yours SAY "serial"?

> appears to work (runs a self-test if you hold the line feed button while
> powering on) but I don't know what the pinout for the interface on the
> rear is (it's a 20-pin header).
> This looks to be a rebadged Trendcom 100 (which I can also find very
> little technical info about) used on a number of early home computers
> (Atari, TRS-80, PET).  Anyone happen to have a manual for this?