I don't know exactly how the dtr is supposed to connect up, but when I tried the ct486, it didn't seem to work right.

Sadly, the windows driver will only do 96x72 dpi.

void dtr_handler(uint8_t data)
// output_dsr(data);

so after trying output_cts it seemed to work better:

[Linked Image from i.imgur.com]

from the command line only, can do a

mode com2 9600 n 8 1 r

(need the r at the end to automatically retry)

dir windows > com2

[Linked Image from i.imgur.com]