IEC code size optimizations

2019-12-26 16:24:13 +01:00
1 parent f5eef54df6
commit 0cafc8defb
@@ -1,4 +1,8 @@

+//
+// Note: damages .X
+//
+

 #if CONFIG_IEC

@@ -14,8 +18,8 @@ iec_wait60us:

 	// Waste cycles in a loop

-	ldy #$0A   // 2 cycles
-!:	dey        // 2 cycles * 10
+	ldx #$0A   // 2 cycles
+!:	dex        // 2 cycles * 10
 	bpl !-     // 3 cycles * 9  + 2 cycles
 	rts        // 6 cycles