added first CPU specific optimizations

c64/kernal/reset_entry.s

@@ -5,9 +5,10 @@
 reset_entry:
 
 	// The GPL program at https://github.com/Klaus2m5/6502_65C02_functional_tests/blob/master/6502_functional_test.a65
-	// uses the following initial reset sequence
-	// affirmed by c64 PRG p269
-	cld
+	// uses the following initial reset sequence, affirmed by c64 PRG p269
+#if !HAS_BCD_SAFE_RESET
+	cld // for CPUs having undefined D flag after reset
+#endif
 	ldx #$FF
 	txs
 	sei