more atarixl linker cfg file cleanups; adapt atarixl-overlay.cfg

libsrc/atari/shadow_ram_prepare.s

@@ -18,7 +18,7 @@ DEBUG   =       1
         .import         __SHADOW_RAM_LOAD__, __SHADOW_RAM_SIZE__
         .import         __SHADOW_RAM_RUN__
         .import         __CHARGEN_START__, __CHARGEN_SIZE__
-        .import         __SAVEAREA_LOAD__
+        .import         __STARTADDRESS__       ; needed by xlmemchk.inc
 
         .include        "zeropage.inc"
         .include        "atari.inc"

libsrc/atari/system_check.s

@@ -17,7 +17,7 @@ DEBUG	=	1
 
 	.export		syschk
         .import         __SYSCHK_LOAD__
-        .import         __SAVEAREA_LOAD__       ; needed by xlmemchk.inc
+        .import         __STARTADDRESS__       ; needed by xlmemchk.inc
 
         .include        "zeropage.inc"
         .include        "atari.inc"
@@ -75,6 +75,7 @@ cont:	ldx	#0		; channel 0
 no_xl:	print_string "This program needs an XL machine."
 	jmp	fail
 
+; entry point
 syschk:
 	lda     $fcd8		; from ostype.s
         cmp     #$a2

libsrc/atari/xlmemchk.inc

@@ -9,7 +9,7 @@
 ; by the screen memory afterwards.
 ; 
 ; inputs:
-;	__SAVEAREA_LOAD__	-	load address of the program
+;	__STARTADDRESS__	-	load address of the program
 ; outputs:
 ;	lodadr			-	(high byte only) value to
 ;					write into RAMTOP
@@ -75,8 +75,10 @@ al4k:	lda	lodadr+1
 	bne	scrmemtst
 ; not reached
 
-
-lodadr:	.word	__SAVEAREA_LOAD__ & $FF00		; our program's load address, rounded down to page boundary
+.ifdef DEBUG
+.byte "XLMEMCHK:>"
+.endif
+lodadr:	.word	__STARTADDRESS__ & $FF00		; our program's load address, rounded down to page boundary
 tstadr:	.res	2
 lowadr:	.res	2
 tmp:	.res	1