From f65019462c11c6cc6a527db749f70fbf4ca1c889 Mon Sep 17 00:00:00 2001
From: Olivier Galibert <galibert@pobox.com>
Date: Thu, 5 Apr 2018 21:26:54 +0200
Subject: [PATCH] Add notd, used by vf2 collision (nw)

---
 src/devices/cpu/mb86233/mb86233.cpp  | 18 +++++++++++++-----
 src/devices/cpu/mb86233/mb86233d.cpp |  2 +-
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/devices/cpu/mb86233/mb86233.cpp b/src/devices/cpu/mb86233/mb86233.cpp
index 8808bf50e84..739cdf5a766 100644
--- a/src/devices/cpu/mb86233/mb86233.cpp
+++ b/src/devices/cpu/mb86233/mb86233.cpp
@@ -307,6 +307,14 @@ void mb86233_device::alu_pre(u32 alu)
 		break;
 	}
 
+	case 0x04: {
+		// notd
+		m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
+		m_alu_r1 = ~m_d;
+		m_alu_stset = m_alu_r1 ? m_alu_r1 & 0x80000000 ? F_SGD : 0 : F_ZRD;
+		break;
+	}
+
 	case 0x05: {
 		// fcpd
 		m_alu_stmask = F_ZRD|F_SGD|F_CPD|F_OVD|F_DVZD;
@@ -504,11 +512,11 @@ void mb86233_device::alu_post(u32 alu)
 		alu_update_st();
 		break;
 
-	case 0x01: case 0x02: case 0x03: case 0x06:
-	case 0x07: case 0x0b: case 0x0c: case 0x0e:
-	case 0x0f: case 0x10: case 0x11: case 0x13:
-	case 0x14: case 0x16: case 0x17: case 0x18:
-	case 0x19: case 0x1a: case 0x1b:
+	case 0x01: case 0x02: case 0x03: case 0x04:
+	case 0x06: case 0x07: case 0x0b: case 0x0c:
+	case 0x0e: case 0x0f: case 0x10: case 0x11:
+	case 0x13: case 0x14: case 0x16: case 0x17:
+	case 0x18: case 0x19: case 0x1a: case 0x1b:
 		// d update
 		m_d = m_alu_r1;
 		alu_update_st();
diff --git a/src/devices/cpu/mb86233/mb86233d.cpp b/src/devices/cpu/mb86233/mb86233d.cpp
index a12bd4e4d8b..6fde2449449 100644
--- a/src/devices/cpu/mb86233/mb86233d.cpp
+++ b/src/devices/cpu/mb86233/mb86233d.cpp
@@ -222,7 +222,7 @@ std::string mb86233_disassembler::alu0_func(u32 alu)
 	case 0x01: util::stream_format(stream, "andd"); break;
 	case 0x02: util::stream_format(stream, "orad"); break;
 	case 0x03: util::stream_format(stream, "eord"); break;
-		// 04
+	case 0x04: util::stream_format(stream, "notd"); break;
 	case 0x05: util::stream_format(stream, "fcpd"); break;
 	case 0x06: util::stream_format(stream, "fadd"); break;
 	case 0x07: util::stream_format(stream, "fsbd"); break;