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-rw-r--r--src/devices/bus/qbus/dvk_kgd.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/devices/bus/qbus/dvk_kgd.h b/src/devices/bus/qbus/dvk_kgd.h
new file mode 100644
index 00000000000..8ecd4ef23e2
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+++ b/src/devices/bus/qbus/dvk_kgd.h
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+// license:BSD-3-Clause
+// copyright-holders:Sergey Svishchev
+/***************************************************************************
+
+ Monochrome register-addressable framebuffer used in DVK.
+
+***************************************************************************/
+
+#ifndef MAME_BUS_QBUS_DVK_KGD_H
+#define MAME_BUS_QBUS_DVK_KGD_H
+
+#pragma once
+
+#include "qbus.h"
+
+#include "screen.h"
+
+
+static constexpr int KGDCR_WR = 0140000;
+static constexpr int KGDDR_WR = 0000377;
+static constexpr int KGDAR_WR = 0037777;
+static constexpr int KGDCT_WR = 0037777;
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+// ======================> dvk_kgd_device
+
+class dvk_kgd_device : public device_t,
+ public device_qbus_card_interface
+{
+public:
+ // construction/destruction
+ dvk_kgd_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+
+ uint16_t read(offs_t offset);
+ void write(offs_t offset, uint16_t data);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ required_device<screen_device> m_screen;
+
+private:
+ std::unique_ptr<uint8_t[]> m_videoram_base;
+ uint8_t *m_videoram;
+
+ uint16_t m_cr;
+ uint16_t m_dr;
+ uint16_t m_ar;
+ uint16_t m_ct;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(DVK_KGD, dvk_kgd_device)
+
+#endif