Hello Ralf Quint,
Well, not having comments to understand what you are doing is pretty
tough when you don't have the time to analyze the code line by line. But
IIRC, the common way to check for the presence of an ANSI device driver
was to check via an INT 2Fh (multiplexer) call (don't recall the exact
call value (AX/AH)).
Will take a closer look at this later this evening when I am back, I am
heading out to this year's SCaLE conference... ;-)
What Jerome's code does is to send an `ESC [ 6 n' sequence and try to
check (in a particular way) if the console responds with a "keyboard
input" sequence of the form `ESC [' ... `R CR'.
About these sequences, the Linux console_codes(4) man page says,
"ESC [ 6 n
"Cursor position report (CPR): Answer is ESC [ y ; x R, where x,y
is the cursor location.
"
Thank you!
--
https://gitlab.com/tkchia
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