Fixed problems with the startup code (Greg King): Interrupts must be hooked

before calling initlib because initlib calls contructors and may install
drivers, which enable hardware interrupts. Similar for donelib.

See also R3897 where this change was done for other platforms.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3951 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/plus4/crt0.s

@@ -80,16 +80,16 @@ L1:	lda	sp,x
 
   	jsr	zerobss
 
-; Call module constructors
-
-  	jsr	initlib
-
 ; Initialize irqcount, which means that from now own custom linked in IRQ
 ; handlers (via condes) will be called.
 
         lda     #.lobyte(__INTERRUPTOR_COUNT__*2)
         sta     irqcount
 
+; Call module constructors
+
+  	jsr	initlib
+
 ; Push arguments and call main()
 
   	jsr    	callmain
@@ -97,9 +97,12 @@ L1:	lda	sp,x
 ; Back from main (this is also the _exit entry). Run module destructors.
 
 _exit: 	pha		       	; Save the return code
+        jsr	donelib         ; Run module destructors
+
+; Disable chained IRQ handlers
+
 	lda     #0
         sta     irqcount        ; Disable custom IRQ handlers
-        jsr	donelib         ; Run module destructors
 
 ; Copy back the zero page stuff