From 1977bcf53d83a58b858bf7963229621e9d3e72d4 Mon Sep 17 00:00:00 2001
From: mamehaze <140764005+mamehaze@users.noreply.github.com>
Date: Wed, 13 Dec 2023 02:26:41 +0000
Subject: [PATCH] tvgames/gpm4530a_lexibook_jg7420.cpp: Added a skeleton driver
 for the ARM-based Lexibook JG7420. (#11837)

Only the built-in SD Card is dumped, no boot ROM is dumped.

New systems marked not working
----------------------
Lexibook JG7420 200-in-1 [David Haywood]
---
 src/mame/mame.lst                             |  3 +
 src/mame/tvgames/gpm4530a_lexibook_jg7420.cpp | 94 +++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 src/mame/tvgames/gpm4530a_lexibook_jg7420.cpp

diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index 3c055c4e845..0cf67154bda 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -44682,6 +44682,9 @@ tagalaga
 taspinv
 taturtf
 
+@source:tvgames/gpm4530a_lexibook_jg7420.cpp
+lx_jg7420
+
 @source:tvgames/magiceyes_pollux_vr3520f.cpp
 didj                            // (c) 2008 Leapfrog
 
diff --git a/src/mame/tvgames/gpm4530a_lexibook_jg7420.cpp b/src/mame/tvgames/gpm4530a_lexibook_jg7420.cpp
new file mode 100644
index 00000000000..9ce8574ad15
--- /dev/null
+++ b/src/mame/tvgames/gpm4530a_lexibook_jg7420.cpp
@@ -0,0 +1,94 @@
+// license:BSD-3-Clause
+// copyright-holders:David Haywood
+
+// uses a GPM4530A (see https://www.generalplus.com/GPM4530A-j2tLs-1LVbPHkLN4921SVpnSNproduct_detail )
+
+#include "emu.h"
+
+#include "cpu/arm7/arm7.h"
+#include "cpu/arm7/arm7core.h"
+#include "machine/spi_sdcard.h"
+
+#include "screen.h"
+#include "speaker.h"
+
+namespace {
+
+class gpm4530a_lexibook_state : public driver_device
+{
+public:
+	gpm4530a_lexibook_state(const machine_config &mconfig, device_type type, const char *tag) :
+		driver_device(mconfig, type, tag),
+		m_maincpu(*this, "maincpu"),
+		m_screen(*this, "screen"),
+		m_sdcard(*this, "sdcard")
+	{ }
+
+	void gpm4530a_lexibook(machine_config &config);
+
+protected:
+	virtual void machine_start() override;
+	virtual void machine_reset() override;
+
+	void arm_map(address_map &map);
+
+	required_device<cpu_device> m_maincpu;
+	required_device<screen_device> m_screen;
+	required_device<spi_sdcard_sdhc_device> m_sdcard;
+
+	uint32_t screen_update_gpm4530a_lexibook(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
+
+private:
+
+};
+
+void gpm4530a_lexibook_state::arm_map(address_map &map)
+{
+}
+
+uint32_t gpm4530a_lexibook_state::screen_update_gpm4530a_lexibook(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
+{
+	return 0;
+}
+
+void gpm4530a_lexibook_state::machine_start()
+{
+}
+
+void gpm4530a_lexibook_state::machine_reset()
+{
+}
+
+static INPUT_PORTS_START( gpm4530a_lexibook )
+INPUT_PORTS_END
+
+
+void gpm4530a_lexibook_state::gpm4530a_lexibook(machine_config &config)
+{
+	ARM9(config, m_maincpu, 192'000'000);
+	m_maincpu->set_addrmap(AS_PROGRAM, &gpm4530a_lexibook_state::arm_map);
+
+	SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
+	m_screen->set_refresh_hz(60);
+	m_screen->set_size(320, 262);
+	m_screen->set_visarea(0, 320-1, 0, 240-1);
+	m_screen->set_screen_update(FUNC(gpm4530a_lexibook_state::screen_update_gpm4530a_lexibook));
+
+	SPI_SDCARD(config, m_sdcard, 0);
+
+	SPEAKER(config, "lspeaker").front_left();
+	SPEAKER(config, "rspeaker").front_right();
+}
+
+ROM_START( lx_jg7420 )
+	ROM_REGION( 0x10000, "boot", ROMREGION_ERASEFF )
+	ROM_LOAD( "bootrom.bin", 0x00000, 0x10000, NO_DUMP ) // unknown size/capacity/type
+
+	DISK_REGION( "sdcard" ) // 4GB SD Card
+	DISK_IMAGE( "jg7420", 0, SHA1(214a1686c7eefdb4cb5d723e98957600c8cb138d) )
+ROM_END
+
+} // anonymous namespace
+
+// JG7420_24 on sticker
+CONS( 201?, lx_jg7420,    0,       0,      gpm4530a_lexibook, gpm4530a_lexibook, gpm4530a_lexibook_state, empty_init, "Lexibook", "Lexibook JG7420 200-in-1", MACHINE_IS_SKELETON )