From: slack <slack@codemaniacs.com>
Date: Sun, 2 Oct 2011 16:12:34 +0000 (+0200)
Subject: Fixed zero flag in SBC
X-Git-Url: http://slack.codemaniacs.com/git/?a=commitdiff_plain;h=917184d6356d81ff0ccacff8dae2717822243b22;p=wenboi.git

Fixed zero flag in SBC
---

diff --git a/core/GameBoy.cc b/core/GameBoy.cc
index bf789fb..f49ffc8 100644
--- a/core/GameBoy.cc
+++ b/core/GameBoy.cc
@@ -745,7 +745,7 @@ GameBoy::run_status GameBoy::run_cycle()
 
 						set_flag(ADD_SUB_FLAG);
 						set_flag_if (res < 0,      CARRY_FLAG);
-						set_flag_if (res == 0,     ZERO_FLAG);
+						set_flag_if (regs.A == 0,  ZERO_FLAG);
 						set_flag_if (half_res < 0, HALF_CARRY_FLAG);
 						cycles_until_next_instruction = 8; 
 						break;
@@ -761,7 +761,7 @@ GameBoy::run_status GameBoy::run_cycle()
 
 						set_flag(ADD_SUB_FLAG);
 						set_flag_if (res < 0,      CARRY_FLAG);
-						set_flag_if (res == 0,     ZERO_FLAG);
+						set_flag_if (regs.A == 0,  ZERO_FLAG);
 						set_flag_if (half_res < 0, HALF_CARRY_FLAG);
 						cycles_until_next_instruction = 8; 
 						break;
diff --git a/core/opcodes.h b/core/opcodes.h
index 61c05c8..d5eab5d 100644
--- a/core/opcodes.h
+++ b/core/opcodes.h
@@ -144,7 +144,7 @@
 		regs.A = static_cast<u8>(res); \
 		set_flag(ADD_SUB_FLAG); \
 		set_flag_if (res < 0,      CARRY_FLAG); \
-		set_flag_if (res == 0,     ZERO_FLAG); \
+		set_flag_if (regs.A == 0,  ZERO_FLAG); \
 		set_flag_if (half_res < 0, HALF_CARRY_FLAG); \
 		cycles_until_next_instruction = 4; \
 		break; \