Added more stuff from groepaz with cleanups

git-svn-id: svn://svn.cc65.org/cc65/trunk@2122 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/nes/setcursor.s

@@ -0,0 +1,39 @@
+;
+; Written by Groepaz/Hitmen <groepaz@gmx.net>
+; Cleanup by Ullrich von Bassewitz <uz@cc65.org>
+;
+; Set the cursor position
+
+   	.export         setcursor
+
+   	.include	"nes.inc"
+
+;-----------------------------------------------------------------------------
+
+.proc   setcursor
+
+	tya
+	clc
+	adc     addrlo,x
+	sta	SCREEN_PTR
+
+    	lda     addrhi,x
+    	adc     #0
+    	sta	SCREEN_PTR+1
+        rts
+
+    	rts
+
+.endproc
+
+;-----------------------------------------------------------------------------
+; Tables with screen addresses
+
+addrlo: .repeat screenrows,line
+    	.byte <($2000+((1*32))+(line*charsperline))
+    	.endrepeat
+
+addrhi: .repeat screenrows,line
+	.byte >($2000+((1*32))+(line*charsperline))
+	.endrepeat
+