Some formatting and style fixes.

libsrc/atari/crt0.s

@@ -100,23 +100,6 @@ start:
 
         jsr     initlib
 
-.if 0
-.ifdef __ATARIXL__
-        .import __heapadd
-        .import pushax
-        .import __RAM_BELOW_ROM_START__
-        .import __RAM_BELOW_ROM_SIZE__
-        .import __RAM_BELOW_ROM_LAST__
-
-        lda     #<__RAM_BELOW_ROM_LAST__
-        ldx     #>__RAM_BELOW_ROM_LAST__
-        jsr     pushax
-        lda     #<(__RAM_BELOW_ROM_SIZE__ - (__RAM_BELOW_ROM_LAST__ - __RAM_BELOW_ROM_START__))
-        ldx     #>(__RAM_BELOW_ROM_SIZE__ - (__RAM_BELOW_ROM_LAST__ - __RAM_BELOW_ROM_START__))
-        jsr     __heapadd
-.endif
-.endif
-
 ; Set left margin to 0
 
         lda     LMARGN
@@ -179,7 +162,9 @@ _exit:  jsr     donelib         ; Run module destructors
         sta     MEMTOP+1
 
 
-; ... issue a GRAPHICS 0 call (copied'n'pasted from TGI drivers)
+; Issue a GRAPHICS 0 call (copied'n'pasted from TGI drivers) in
+; order to restore screen memory to its defailt location just
+; before the ROM.
 
         jsr     findfreeiocb
 
@@ -199,7 +184,9 @@ _exit:  jsr     donelib         ; Run module destructors
         lda     #0
         sta     ICBLH,x
         jsr     CIOV_org
-; add error checking here...
+; No error checking here, shouldn't happen(tm), and no way to
+; recover anyway.
+
         lda     #CLOSE
         sta     ICCOM,x
         jsr     CIOV_org