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-rw-r--r--doc/nasmdoc.src3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/nasmdoc.src b/doc/nasmdoc.src
index 588e2956..d6a14a3b 100644
--- a/doc/nasmdoc.src
+++ b/doc/nasmdoc.src
@@ -1059,7 +1059,8 @@ An identifier may also be prefixed with a \I{$, prefix}\c{$} to
indicate that it is intended to be read as an identifier and not a
reserved word; thus, if some other module you are linking with
defines a symbol called \c{eax}, you can refer to \c{$eax} in NASM
-code to distinguish the symbol from the register.
+code to distinguish the symbol from the register. Maximum length of
+an identifier is 4095 characters.
The instruction field may contain any machine instruction: Pentium
and P6 instructions, FPU instructions, MMX instructions and even