From 33d3fbc45eb800121f3bf5f42a70e9fea9481f1b Mon Sep 17 00:00:00 2001
From: yz70s <yz70s@users.noreply.github.com>
Date: Sun, 17 Jan 2016 19:42:32 +0100
Subject: [PATCH] idehd.cpp: Respond to command SECURITY DISABLE PASSWORD (nw)

---
 src/devices/machine/atahle.h  |  1 +
 src/devices/machine/idehd.cpp | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/devices/machine/atahle.h b/src/devices/machine/atahle.h
index 2ccfb397b26..95f55a8b68a 100644
--- a/src/devices/machine/atahle.h
+++ b/src/devices/machine/atahle.h
@@ -126,6 +126,7 @@ protected:
 		IDE_COMMAND_IDENTIFY_DEVICE = 0xec,
 		IDE_COMMAND_SET_FEATURES = 0xef,
 		IDE_COMMAND_SECURITY_UNLOCK = 0xf2,
+		IDE_COMMAND_SECURITY_DISABLE_PASSWORD = 0xf6,
 		IDE_COMMAND_READ_NATIVE_MAX_ADDRESS = 0xf8,
 		IDE_COMMAND_SET_MAX = 0xf9
 	};
diff --git a/src/devices/machine/idehd.cpp b/src/devices/machine/idehd.cpp
index 68a6cdbbdc9..78cda7b1f2a 100644
--- a/src/devices/machine/idehd.cpp
+++ b/src/devices/machine/idehd.cpp
@@ -506,6 +506,10 @@ void ata_mass_storage_device::process_buffer()
 		if (m_master_password_enable || m_user_password_enable)
 			security_error();
 	}
+	else if (m_command == IDE_COMMAND_SECURITY_DISABLE_PASSWORD)
+	{
+		LOGPRINT(("IDE Done unimplemented SECURITY_DISABLE_PASSWORD command\n"));
+	}
 	else
 	{
 		set_dasp(ASSERT_LINE);
@@ -685,6 +689,15 @@ void ata_mass_storage_device::process_command()
 		set_irq(ASSERT_LINE);
 		break;
 
+	case IDE_COMMAND_SECURITY_DISABLE_PASSWORD:
+		LOGPRINT(("IDE Unimplemented SECURITY DISABLE PASSWORD command\n"));
+
+		/* mark the buffer ready */
+		m_status |= IDE_STATUS_DRQ;
+
+		set_irq(ASSERT_LINE);
+		break;
+
 	case IDE_COMMAND_IDENTIFY_DEVICE:
 		LOGPRINT(("IDE Identify device\n"));