TPDD client:PDD210
Download from archive.org: PDD210.ZIP
This is an MS-DOS program, but it runs fine in dosbox.
To download, unpack, and run in dosbox, with COM1 connected to /dev/ttyUSB0:
wget https://archive.org/download/M100SIG/M100SIG.zip/Lib-09-PERIFERALS/PDD210.ZIP unzip PDD210.ZIP dosbox -c "serial1 directserial realport:ttyUSB0" . C:>pdd