"VT100 Emulation" Wow!! Talk about a blast from the past. I do not think I have used a VT100 emulator for 20 years and surprised and maybe a little nostalgic that they still have use in the world today. Although, with death of DEC and other mainframes I am at a loss to guess where there use is.
Not sure if this will be helpful in your search for code, but the vt-100 terminal was, itself, an emulation of the ASR-33 Teletype.