am8052: Skeleton device implementation (inadvertently omitted from 6a3e79f9a7, nw)

src/devices/video/am8052.cpp

@@ -0,0 +1,64 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/**********************************************************************
+
+    AMD Am8052 Alphanumeric CRT Controller (CRTC)
+
+    Skeleton device.
+
+**********************************************************************/
+
+#include "emu.h"
+#include "video/am8052.h"
+//#include "screen.h"
+
+//**************************************************************************
+//  GLOBAL VARIABLES
+//**************************************************************************
+
+// device type definition
+DEFINE_DEVICE_TYPE(AM8052, am8052_device, "am8052", "Am8052 CRTC")
+
+//**************************************************************************
+//  DEVICE IMPLEMENTATION
+//**************************************************************************
+
+//-------------------------------------------------
+//  am8052_device - constructor
+//-------------------------------------------------
+
+am8052_device::am8052_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: device_t(mconfig, AM8052, tag, owner, clock)
+	, m_pointer(0xffff)
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void am8052_device::device_start()
+{
+	save_item(NAME(m_pointer));
+}
+
+
+//-------------------------------------------------
+//  pointer_w - set pointer register
+//-------------------------------------------------
+
+void am8052_device::pointer_w(u16 data)
+{
+	m_pointer = data;
+}
+
+
+//-------------------------------------------------
+//  data_w - write to data register
+//-------------------------------------------------
+
+void am8052_device::data_w(u16 data)
+{
+	logerror("%s: Register %04X = %04X\n", machine().describe_context(), m_pointer, data);
+}

src/devices/video/am8052.h

@@ -0,0 +1,42 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/**********************************************************************
+
+    AMD Am8052 Alphanumeric CRT Controller (CRTC)
+
+**********************************************************************/
+
+#ifndef MAME_VIDEO_AM8052_H
+#define MAME_VIDEO_AM8052_H
+
+#pragma once
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> am8052_device
+
+class am8052_device : public device_t
+{
+public:
+	// device constructor
+	am8052_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+	// read/write handlers
+	void pointer_w(u16 data);
+	void data_w(u16 data);
+
+protected:
+	// device-specific overrides
+	virtual void device_start() override;
+
+private:
+	// internal state
+	u16 m_pointer;
+};
+
+// device type declarations
+DECLARE_DEVICE_TYPE(AM8052, am8052_device)
+
+#endif // MAME_VIDEO_AM8052_H