From 7dd511b7dd2b3f5474208d15ecb438ddd16f6156 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rados=C5=82aw=20Kujawa?= <radoslaw.kujawa@c0ff33.net>
Date: Sat, 11 Feb 2017 22:36:57 +0100
Subject: [PATCH] Implement much better test case for decimal mode.

---
 test/test_emulation.c         |  4 +++-
 test/test_emulation_adc_bcd.s | 11 +++++++++--
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/test/test_emulation.c b/test/test_emulation.c
index af7cb50..3710ecb 100644
--- a/test/test_emulation.c
+++ b/test/test_emulation.c
@@ -1190,7 +1190,9 @@ ATF_TC_BODY(emul_adc_bcd, tc)
 
 	ATF_REQUIRE(rom_start(&e, "test_emulation_adc_bcd.rom", tc));
 
-	ATF_CHECK(e.regs.A == 0x21);
+	ATF_CHECK(bus_read_1(&b, 0x10) == 0x05);
+	ATF_CHECK(bus_read_1(&b, 0x11) & P_CARRY);
+
 	rk65c02_dump_regs(&e);
 
 }
diff --git a/test/test_emulation_adc_bcd.s b/test/test_emulation_adc_bcd.s
index a456fb7..769dc3b 100644
--- a/test/test_emulation_adc_bcd.s
+++ b/test/test_emulation_adc_bcd.s
@@ -1,5 +1,12 @@
+; somewhat inspired by http://www.6502.org/tutorials/decimal_mode.html
 start:  sed
-	lda #0x11
-	adc #0x22
+	sec
+	lda #0x58
+	adc #0x46
+	sta 0x10
+	php
+	plx
+	stx 0x11
+
 	stp