Fixed many comments

libsrc/cbm/cbm_read.s

@@ -24,7 +24,7 @@
 ;         /* the kernal routine BASIN sets ST to EOF if the end of file
 ;         ** is reached the first time, then we have store tmp.
 ;         ** every subsequent call returns EOF and READ ERROR in ST, then
-;         ** we have to exit the loop here immediatly.
+;         ** we have to exit the loop here immediately.
 ;         */
 ;         if (cbm_k_readst() & 0xBF) break;
 ;

libsrc/cbm/exec.c

@@ -89,7 +89,7 @@ int __fastcall__ exec (const char* progname, const char* cmdline)
     }
     utoa (dv, basic.unit, 10);
 
-    /* Tape files can be openned only once; skip this test for the Datasette. */
+    /* Tape files can be opened only once; skip this test for the Datasette. */
     if (dv != 1) {
         /* Don't try to run a program that can't be found. */
         fd = open (progname, O_RDONLY);

libsrc/cbm/getdevice.s

@@ -54,7 +54,7 @@ next:   inx
 
         lda     ST
 
-; Either the Kernal calls above were successfull or there was
+; Either the Kernal calls above were successful or there was
 ; already a cmdchannel to the device open - which is a pretty
 ; good indication of its existence ;-)
 

libsrc/cbm/loadaddr.s

@@ -2,7 +2,7 @@
 ; Ullrich von Bassewitz, 2010-11-13
 ;
 ; This module supplies the load address that is expected by Commodore
-; machines in the first two bytes of an excutable disk file.
+; machines in the first two bytes of an executable disk file.
 ;