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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
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