diff --git a/MAKEFILE b/MAKEFILE
index c74ecdb..25489e3 100644
--- a/MAKEFILE
+++ b/MAKEFILE
@@ -6,7 +6,7 @@
 # you can control the availability of some features with the FEATURES string:
 #  -DSBAWE    enables SoundBlaster AWE drivers (+36K)
 #  -DOPL      enables MIDI emulation over OPL output (+7K)
-#  -DDBGFILE   enables debug output to file (+10K)
+#  -DDBGFILE  enables debug output to file (+10K)
 #  -DCMS      enables Creative Music System / Game Blaster output
 FEATURES = -DCMS -DDBGFILE
 
diff --git a/README.TXT b/README.TXT
index 12b7153..1a8d6eb 100644
--- a/README.TXT
+++ b/README.TXT
@@ -1,4 +1,21 @@
+DOSMid Copyright (C) 2014-2018 Mateusz Viste
+Creative Music System / Game Blaster output support version (C) Tronix 2021
 
+Used piece of software codes from third-party peoples, eg:
+- DEATHSHADOW'S Paku-Paku game by Jason M. Knight
+- SAATunes v 1.04 lib by Bobcatmodder Jacob Field
+- Arduino YM2149 MIDI Synth by yukimizake
+
+New DOSMid options:
+
+ /cms=XXX  Force dosmid to use Creative Music System / Game Blaster
+           on port XXX. If not forced, DOSMID use the default port 220h. 
+           The port part is optional, that means you can use "/cms" 
+           to just force CMS usage.
+
+
+============================= ORIGINAL DOSMID.TXT
+           
          DOSMid - a low-requirements MIDI and MUS player for DOS
                     http://dosmid.sourceforge.net