From c00d2c136076f967fbb39d1faa2d6d731fd52a0e Mon Sep 17 00:00:00 2001
From: dwsJason <JGAndersen@gmail.com>
Date: Sun, 19 Aug 2018 16:11:13 -0400
Subject: [PATCH] DrawSprite: modify ASM function, to be called from ORCA C

---
 asm/drawsprite.s | 23 +++++++++++++++++++++--
 include/system.h |  1 +
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/asm/drawsprite.s b/asm/drawsprite.s
index bd9befc..f0e96a8 100644
--- a/asm/drawsprite.s
+++ b/asm/drawsprite.s
@@ -9,13 +9,32 @@
 Dummy4 start ASMCODE
 	end
 *-------------------------------------------------------------------------------
-	
+*
+*void DrrawSprite(int offset, into SpriteNo);
+*	
 DrawSprite start ASMCODE
+
+iOffset equ 5
+iSpriteNo equ 7
+
 	PHB
 	PHK
 	PLB
+	
+	lda iOffset,s	; Screen Address
+	tay				; Y=Target Screen Address ($2000-$9D00)
+	
+	lda iSpriteNo,s
 	ASL	A	; A=Sprite Number ($0000-$01C1)
-	TAX		; Y=Target Screen Address ($2000-$9D00)
+	tax
+* Repair Stack
+    lda 3,s
+    sta iSpriteNo,s
+    lda 1,s
+    sta iSpriteNo-2,s
+	pla
+	pla
+* Dispatch bank specific
 	LDA	xrickNum,X	; Relative Sprite Number Table
 	JMP	(xrickBank,X)	; Bank Number Table
 
diff --git a/include/system.h b/include/system.h
index 22ef7f0..64e0e87 100644
--- a/include/system.h
+++ b/include/system.h
@@ -182,6 +182,7 @@ extern volatile unsigned long* tick;
 extern void SetTileBank(short bank);
 extern void DrawTile(int offset, int tileNo);
 extern void SetSpriteBanks(short b0, short b1, short b2, short b3);
+extern void DrawSprite(int offset, into SpriteNo);
 
 // ADB Support Code
 extern char KeyArray[128];