From 05b92a69a45d596901c0fb6f363c8553c021a53e Mon Sep 17 00:00:00 2001
From: hap <happppp@users.noreply.github.com>
Date: Fri, 11 Jun 2021 14:05:48 +0200
Subject: [PATCH] New working software list additions
 ----------------------------------- ggm: Morphy Edition - Master Chess
 [Berger]

---
 hash/ggm.xml                 | 17 ++++++++++++++++-
 src/mame/drivers/aci_ggm.cpp |  9 ++++-----
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/hash/ggm.xml b/hash/ggm.xml
index c704ff3b92e..865955604d9 100644
--- a/hash/ggm.xml
+++ b/hash/ggm.xml
@@ -37,7 +37,22 @@ license:CC0
 		</part>
 	</software>
 
-	<software name="sandy">
+	<software name="morphy">
+		<description>Morphy Edition - Master Chess</description>
+		<year>1981</year>
+		<publisher>Applied Concepts</publisher>
+		<part name="cart" interface="ggm">
+			<feature name="overlay" value="0x02" />
+			<dataarea name="rom" size="0x8000">
+				<rom name="7075-03" offset="0x4000" size="0x1000" crc="3787e728" sha1="c5408fefdd0fa213b535cbc1e530defd6d90fcfa" /> <!-- HN462732 -->
+				<rom                offset="0x6000" size="0x1000" loadflag="reload" />
+				<rom name="7076-04" offset="0x5000" size="0x1000" crc="57867a31" sha1="06f415231b4fbf95a9b95664ef2c9c7d1342ef56" /> <!-- " -->
+				<rom                offset="0x7000" size="0x1000" loadflag="reload" />
+			</dataarea>
+		</part>
+	</software>
+
+	<software name="sandy" cloneof="morphy">
 		<description>Sandy Edition - Master Chess</description>
 		<year>1981</year>
 		<publisher>Applied Concepts / Sandy Electronic</publisher>
diff --git a/src/mame/drivers/aci_ggm.cpp b/src/mame/drivers/aci_ggm.cpp
index 225e5418067..bb9c52b1609 100644
--- a/src/mame/drivers/aci_ggm.cpp
+++ b/src/mame/drivers/aci_ggm.cpp
@@ -7,7 +7,7 @@ Applied Concepts Great Game Machine (GGM), electronic board game computer.
 2nd source distribution: Modular Game System (MGS), by Chafitz.
 
 Hardware notes:
-- 6502A 2MHz (unknown XTAL, label "5-80"), SYP6522 VIA
+- 6502A 2MHz, SYP6522 VIA
 - 2KB RAM(4*HM472114AP-2), no ROM on main PCB
 - 2*74164 shift register, 3*6118P VFD driver
 - 8-digit 14seg VFD panel (same one as in Speak & Spell)
@@ -19,7 +19,7 @@ There were also some standalone machines, eg. Morphy Encore, Odin Encore.
 Known chess cartridges (*denotes not dumped):
 - Chess/Boris 2.5 (aka Sargon 2.5)
 - *Gruenfeld Edition - Master Chess Openings
-- *Morphy Edition - Master Chess
+- Morphy Edition - Master Chess
 - Capablanca Edition - Master Chess Endgame
 - Sandy Edition - Master Chess (German language version of Morphy)
 - Steinitz Edition-4 - Master Chess
@@ -40,7 +40,6 @@ TODO:
 - it doesn't have nvram, it's a workaround for MAME forcing a hard reset when
   swapping in a new cartridge
 - what's VIA PB0 for? game toggles it once per irq
-- identify XTAL (2MHz CPU/VIA is correct, compared to video reference)
 - confirm display AP segment, is it used anywhere?
 - verify cartridge pinout, right now assume A0-A15 (max known cart size is 24KB).
   Boris/Sargon cartridge is A0-A11 and 2 CS lines, Steinitz uses the whole range.
@@ -432,10 +431,10 @@ INPUT_PORTS_END
 void ggm_state::ggm(machine_config &config)
 {
 	/* basic machine hardware */
-	M6502(config, m_maincpu, 2000000);
+	M6502(config, m_maincpu, 2_MHz_XTAL);
 	m_maincpu->set_addrmap(AS_PROGRAM, &ggm_state::main_map);
 
-	MOS6522(config, m_via, 2000000); // DDRA = 0xff, DDRB = 0x81
+	MOS6522(config, m_via, 2_MHz_XTAL); // DDRA = 0xff, DDRB = 0x81
 	m_via->writepa_handler().set(FUNC(ggm_state::select_w));
 	m_via->writepb_handler().set(FUNC(ggm_state::control_w));
 	m_via->readpb_handler().set(FUNC(ggm_state::input_r));