From 51061219be40ded0634a030071916d4cdd083225 Mon Sep 17 00:00:00 2001
From: cracyc <cracyc@users.noreply.github.com>
Date: Mon, 15 Feb 2016 16:19:49 -0600
Subject: [PATCH] upd7220: command 05 appears to blank the display (nw)

---
 src/devices/video/upd7220.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/devices/video/upd7220.cpp b/src/devices/video/upd7220.cpp
index 23548f1ecd7..32d4d2c3c63 100644
--- a/src/devices/video/upd7220.cpp
+++ b/src/devices/video/upd7220.cpp
@@ -71,7 +71,8 @@ enum
 	COMMAND_LPRD,
 	COMMAND_DMAR,
 	COMMAND_DMAW,
-	COMMAND_5A
+	COMMAND_5A,
+	COMMAND_05
 };
 
 enum
@@ -93,6 +94,7 @@ enum
 #define UPD7220_COMMAND_CCHAR           0x4b
 #define UPD7220_COMMAND_START           0x6b
 #define UPD7220_COMMAND_BCTRL           0x0c // & 0xfe
+#define UPD7220_COMMAND_05				0x05
 #define UPD7220_COMMAND_ZOOM            0x46
 #define UPD7220_COMMAND_CURS            0x49
 #define UPD7220_COMMAND_PRAM            0x70 // & 0xf0
@@ -1049,6 +1051,7 @@ int upd7220_device::translate_command(UINT8 data)
 	case UPD7220_COMMAND_CURD:  command = COMMAND_CURD;  break;
 	case UPD7220_COMMAND_LPRD:  command = COMMAND_LPRD;  break;
 	case UPD7220_COMMAND_5A:    command = COMMAND_5A;    break;
+	case UPD7220_COMMAND_05:    command = COMMAND_05;    break;
 	default:
 		switch (data & 0xfe)
 		{
@@ -1226,6 +1229,10 @@ void upd7220_device::process_fifo()
 		//LOG(("uPD7220 '%s' DE: 1\n", tag()));
 		break;
 
+	case COMMAND_05:
+		m_de = 0;
+		break;
+
 	case COMMAND_BCTRL: /* display blanking control */
 		m_de = m_cr & 0x01;