Don't save original IRQ, NMI, and RESET vectors -- it's not needed.

libsrc/atari/save_area.inc

@@ -1,7 +1,11 @@
+;
+; Atari XL, shared data between 2nd load chunk and main chunk, header file
+;
+; Contains old values of modified system variables and ports.
+;
+; Christian Groessler, chris@groessler.org, 2013
+;
 
-.import	IRQ_save
-.import	NMI_save
-.import	RESET_save
 .import	SAVMSC_save
 .import	MEMTOP_save
 .import	APPMHI_save

libsrc/atari/save_area.s

@@ -1,5 +1,5 @@
 ;
-; Atari XL, shared data between 2nd load chunk and main chunk
+; Atari XL, shared data between 2nd load chunk and main chunk, definition file
 ;
 ; Contains old values of modified system variables and ports.
 ;
@@ -8,9 +8,6 @@
 
 .if .defined(__ATARIXL__)
 
-.export		IRQ_save
-.export		NMI_save
-.export		RESET_save
 .export		SAVMSC_save
 .export		MEMTOP_save
 .export		APPMHI_save
@@ -21,9 +18,6 @@
 
 .segment        "SAVEAREA"
 
-IRQ_save:	.res	2
-NMI_save:	.res	2
-RESET_save:	.res	2
 SAVMSC_save:	.res	2
 MEMTOP_save:	.res	2
 APPMHI_save:	.res	2

libsrc/atari/shadow_ram_handlers.s

@@ -145,7 +145,7 @@ my_IRQ_han:
 	pla
 	plp
 .endif
-	int_wrap IRQ_save
+	int_wrap $FFFE
 
 my_NMI_han:
 .ifdef DEBUG
@@ -174,11 +174,11 @@ my_NMI_han:
 	pla
 	tax
 	pla
-	int_wrap NMI_save
+	int_wrap $FFFA
 
 my_RESET_han:
 	enable_rom
-	jmp	(RESET_save)
+	jmp	($FFFC)
 
 
 ; System request handlers

libsrc/atari/shadow_ram_prepare.s

@@ -88,19 +88,6 @@ sramprep:
         lda     SIOV+2
         sta     ZP_SIOV_save+2
 
-        lda     $fffe
-        sta     IRQ_save
-        lda     $ffff
-        sta     IRQ_save+1
-        lda     $fffc
-        sta     RESET_save
-        lda     $fffd
-        sta     RESET_save+1
-        lda     $fffa
-        sta     NMI_save
-        lda     $fffb
-        sta     NMI_save+1
-
 ; disable BASIC
 
         lda     PORTB