Fix comments and remove whitespace from __asm__ macros

git-svn-id: svn://svn.cc65.org/cc65/trunk@1895 b7a2c559-68d2-44c3-8de9-860c34a00d81

include/6502.h

@@ -49,9 +49,9 @@ unsigned char getcpu (void);
 
 
 /* Macros for CPU instructions */
-#define	BRK()	__asm__ ("\tbrk")
-#define CLI()	__asm__ ("\tcli")
-#define SEI()	__asm__ ("\tsei")
+#define	BRK()	__asm__ ("brk")
+#define CLI()	__asm__ ("cli")
+#define SEI()	__asm__ ("sei")
 
 
 
@@ -86,8 +86,8 @@ struct regs {
 
 /* Function to call any machine language subroutine. All registers in the
  * regs structure are passed into the routine and the results are passed
- * out. Some of the flags are ignored on input. The called routine must
- * end with an RTS.
+ * out. The B flag is ignored on input. The called routine must end with
+ * an RTS.
  */
 void __fastcall__ _sys (struct regs* r);
 

libsrc/common/_sys.s

@@ -25,7 +25,7 @@ __sys:	sta	ptr1
 
 	dey
 	lda	(ptr1),y
-	and	#%11001011
+	and	#%11001111      ; Mask out break and unused flag
 	pha
 	ldy	#0
 	lda	(ptr1),y
@@ -35,7 +35,7 @@ __sys:	sta	ptr1
 
 	iny
 	lda	(ptr1),y
-	tay
+	tax
 	iny
 	lda	(ptr1),y
 	tay