From: Christian Groessler <chris@groessler.org>
Date: Thu, 30 May 2013 00:31:25 +0000 (+0200)
Subject: "save area" is used to save modified system variables and ports. It's
X-Git-Tag: V2.15~223^2~120
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=2f6e7874c626d9c5ef8f55dd1352b1b5e9851c4a;p=cc65

"save area" is used to save modified system variables and ports. It's
shared between the second and main chunk.
---

diff --git a/libsrc/atari/save_area.inc b/libsrc/atari/save_area.inc
new file mode 100644
index 000000000..10ee4af23
--- /dev/null
+++ b/libsrc/atari/save_area.inc
@@ -0,0 +1,6 @@
+
+.import SAVMSC_save
+.import MEMTOP_save
+.import APPMHI_save
+.import RAMTOP_save
+.import PORTB_save
\ No newline at end of file
diff --git a/libsrc/atari/save_area.s b/libsrc/atari/save_area.s
new file mode 100644
index 000000000..0467b67cb
--- /dev/null
+++ b/libsrc/atari/save_area.s
@@ -0,0 +1,25 @@
+;
+; Atari XL, shared data between 2nd load chunk and main chunk
+;
+; Contains old values of modified system variables and ports.
+;
+; Christian Groessler, chris@groessler.org, 2013
+;
+
+.if .defined(__ATARIXL__)
+
+.export		SAVMSC_save
+.export		MEMTOP_save
+.export		APPMHI_save
+.export		RAMTOP_save
+.export		PORTB_save
+
+.segment        "SAVEAREA"
+
+SAVMSC_save:	.res	2
+MEMTOP_save:	.res	2
+APPMHI_save:	.res	2
+RAMTOP_save:	.res	1
+PORTB_save:	.res	1
+
+.endif