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readme: clearer descriptions of secondary and tertiary DA responses

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Daniel Eklöf 2020-10-09 18:52:28 +02:00
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README.md
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@ -323,16 +323,12 @@ chosen to use a different terminfo).
You can instead use the escape sequences to read the _Secondary_ and
_Tertiary Device Attributes_ (secondary/tertiary DA, for short).
The tertiary DA response is always `\EP!|464f4f54\E\\`. The `\EP!|` is
the standard tertiary DA response prefix, `DCS ! |`. The trailing
`\E\\` is of course the standard string terminator, `ST`.
The tertiary DA response is always `\EP!|464f4f54\E\\`, where
`464f4f54` if `FOOT` in hex.
In the response above, the interesting part is `464f4f54`; this is
the string _FOOT_ in hex.
The secondary DA response is `\E[>1;XXYYZZ;0c`, where XXYYZZ is foot's
major, minor and patch version numbers, in decimal, using two digits
for each number. For example, foot-1.4.2 would respond with
The secondary DA response is `\E[>1;XXYYZZ;0c`, where `XXYYZZ` is
foot's major, minor and patch version numbers, in decimal, using two
digits for each number. For example, foot-1.4.2 would respond with
`\E[>1;010402;0c`.
**Note**: not all terminal emulators implement tertiary DA. Most