The duplex mode in TinyTERM has several settings. Each is useful for different servers and devices, as well as troubleshooting. The different modes are:
FULL
Everything on the screen comes from the server. Even what you type is sent to the server, then displayed back to TinyTERM. This is the default setting because it’s usually required.
HALF
What you type displays on the screen locally. If every character you type displays twice, this option is probably set. Some older servers require this, but it’s generally not used any more.
MNEMONIC
Non-printable characters are replaced by text describing them, such as <CR> for a carriage return. Useful for troubleshooting display issues.
CONTROL
Similar to mnemonic, but instead of text, control characters are shown with the caret-character combination. For example, a carriage return will display as ^M.
DUMP
All characters display as two-digit hexadecimal numbers, separated by spaces. So the word hello will display as
68 65 6c 6c 6f