On 2013-02-25, at 12:18 PM, Johnny Billquist <bqt at softjar.se> wrote: And yes, the VT100 predates ANSI, but it's not really incompatible, but there are a bunch of DEC private sequences, that are not in the ANSI spec. I'm not aware of any incompatibilities with the ANSI spec, but feel free to point them out to me. What's the history of the ANSI spec? I've always just assumed that it codified what was being used in the industry already. Ian