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/pet/crt0.s

@@ -70,10 +70,6 @@ L1:	lda	sp,x
 	lda	MEMSIZE+1
        	sta	sp+1   	 	; Set argument stack ptr
 
-; Call module constructors
-
-	jsr	initlib
-
 ; If we have IRQ functions, chain our stub into the IRQ vector
 
 	lda	#<__INTERRUPTOR_COUNT__
@@ -89,13 +85,21 @@ L1:	lda	sp,x
 	stx	IRQVec+1
 	cli
 
+; Call module constructors
+
+NoIRQ1: jsr     initlib
+
 ; Push arguments and call main()
 
-NoIRQ1:	jsr	callmain
+        jsr	callmain
 
 ; Call module destructors. This is also the _exit entry.
 
-_exit: 	pha			; Save the return code on stack
+_exit:  pha			; Save the return code on stack
+        jsr	donelib
+
+; Reset the IRQ vector if we chained it.
+
 	lda     #<__INTERRUPTOR_COUNT__
 	beq	NoIRQ2
 	lda	IRQInd+1
@@ -105,13 +109,9 @@ _exit: 	pha			; Save the return code on stack
 	stx	IRQVec+1
 	cli
 
-; Run module destructors
-
-NoIRQ2:	jsr	donelib		; Run module destructors
-
 ; Copy back the zero page stuff
 
-	ldx	#zpspace-1
+NoIRQ2: ldx     #zpspace-1
 L2:	lda	zpsave,x
 	sta	sp,x
 	dex