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Diffstat (limited to 'src/devices/bus/wangpc/mvc.h')
-rw-r--r-- | src/devices/bus/wangpc/mvc.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/devices/bus/wangpc/mvc.h b/src/devices/bus/wangpc/mvc.h new file mode 100644 index 00000000000..6521aee33a4 --- /dev/null +++ b/src/devices/bus/wangpc/mvc.h @@ -0,0 +1,68 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Wang PC PM-001B Medium-Resolution Video Controller emulation + +**********************************************************************/ + +#pragma once + +#ifndef __WANGPC_MVC__ +#define __WANGPC_MVC__ + +#include "emu.h" +#include "wangpc.h" +#include "video/mc6845.h" + + + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> wangpc_mvc_device + +class wangpc_mvc_device : public device_t, + public device_wangpcbus_card_interface +{ +public: + // construction/destruction + wangpc_mvc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + + // not really public + MC6845_UPDATE_ROW( crtc_update_row ); + DECLARE_WRITE_LINE_MEMBER( vsync_w ); + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + + // device_wangpcbus_card_interface overrides + virtual UINT16 wangpcbus_mrdc_r(address_space &space, offs_t offset, UINT16 mem_mask); + virtual void wangpcbus_amwc_w(address_space &space, offs_t offset, UINT16 mem_mask, UINT16 data); + virtual UINT16 wangpcbus_iorc_r(address_space &space, offs_t offset, UINT16 mem_mask); + virtual void wangpcbus_aiowc_w(address_space &space, offs_t offset, UINT16 mem_mask, UINT16 data); + +private: + inline void set_irq(int state); + + required_device<mc6845_device> m_crtc; + optional_shared_ptr<UINT16> m_video_ram; + optional_shared_ptr<UINT16> m_char_ram; + optional_shared_ptr<UINT16> m_bitmap_ram; + + UINT8 m_option; + int m_irq; +}; + + +// device type definition +extern const device_type WANGPC_MVC; + + +#endif |