diff --git a/libsrc/c64/soft80_cgetc.s b/libsrc/c64/soft80_cgetc.s
index 5343027bb..ae0e23857 100644
--- a/libsrc/c64/soft80_cgetc.s
+++ b/libsrc/c64/soft80_cgetc.s
@@ -1,6 +1,8 @@
 ;
 ; Groepaz/Hitmen, 11.10.2015
 ;
+; high level implementation for the soft80 implementation
+;
 ; char cgetc (void);
 ;
 
diff --git a/libsrc/c64/soft80_charset.s b/libsrc/c64/soft80_charset.s
index 678439a30..69fd3527f 100644
--- a/libsrc/c64/soft80_charset.s
+++ b/libsrc/c64/soft80_charset.s
@@ -1,7 +1,7 @@
 ;
 ; Groepaz/Hitmen, 12.10.2015
 ;
-; character set for use with the soft80 implementation
+; character set for use with the soft80 implementations
 ;
 
 ; the format of the data follows the following layout:
diff --git a/libsrc/c64/soft80_color.s b/libsrc/c64/soft80_color.s
index bbd666af7..8c1d113ac 100644
--- a/libsrc/c64/soft80_color.s
+++ b/libsrc/c64/soft80_color.s
@@ -1,6 +1,8 @@
 ;
 ; Groepaz/Hitmen, 12.10.2015
 ;
+; high level implementation for the soft80 implementation
+;
 ; unsigned char __fastcall__ textcolor (unsigned char color);
 ; unsigned char __fastcall__ bgcolor (unsigned char color);
 ;
diff --git a/libsrc/c64/soft80_cputc.s b/libsrc/c64/soft80_cputc.s
index 1ded7ef6a..acbe5b560 100644
--- a/libsrc/c64/soft80_cputc.s
+++ b/libsrc/c64/soft80_cputc.s
@@ -1,6 +1,8 @@
 ;
 ; Groepaz/Hitmen, 11.10.2015
 ;
+; high level implementation for the soft80 implementation
+;
 ; void cputcxy (unsigned char x, unsigned char y, char c);
 ; void cputc (char c);
 ;