can someone explain what means this line, or provide with source where it is described:
bufor times 400h DB 0
i know that "bufor" it is name. What is "times" and for what are used for?
It is not the same as stack segment, or it is?
"times" is a macro that repeats command. Your line means "Point Bufor to array of 400h (or 1024) zero bytes". Here is the example: http://www.nasm.us/doc/nasmdoc3.html at 3.2.5 section