diff options
Diffstat (limited to 'src/devices/bus/isa/mda.h')
-rw-r--r-- | src/devices/bus/isa/mda.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/devices/bus/isa/mda.h b/src/devices/bus/isa/mda.h new file mode 100644 index 00000000000..8c62520308b --- /dev/null +++ b/src/devices/bus/isa/mda.h @@ -0,0 +1,132 @@ +// license:BSD-3-Clause +// copyright-holders:Wilbert Pol, Miodrag Milanovic +#pragma once + +#ifndef __ISA_MDA_H__ +#define __ISA_MDA_H__ + +#include "emu.h" +#include "isa.h" +#include "video/mc6845.h" + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> isa8_mda_device + +class isa8_mda_device : public device_t, + public device_isa8_card_interface +{ +public: + friend class isa8_hercules_device; + + // construction/destruction + isa8_mda_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + isa8_mda_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source); + + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + virtual const rom_entry *device_rom_region() const; + + DECLARE_WRITE_LINE_MEMBER(hsync_changed); + DECLARE_WRITE_LINE_MEMBER(vsync_changed); + virtual DECLARE_READ8_MEMBER(io_read); + virtual DECLARE_WRITE8_MEMBER(io_write); + virtual DECLARE_READ8_MEMBER(status_r); + virtual DECLARE_WRITE8_MEMBER(mode_control_w); + + WRITE_LINE_MEMBER(pc_cpu_line); + + virtual MC6845_UPDATE_ROW( crtc_update_row ); + MC6845_UPDATE_ROW( mda_text_inten_update_row ); + MC6845_UPDATE_ROW( mda_text_blink_update_row ); + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); +public: + int m_framecnt; + + UINT8 m_mode_control; + + int m_update_row_type; + UINT8 *m_chr_gen; + UINT8 m_vsync; + UINT8 m_hsync; + dynamic_buffer m_videoram; + UINT8 m_pixel; + required_device<palette_device> m_palette; +}; + + +// device type definition +extern const device_type ISA8_MDA; + +// ======================> isa8_hercules_device + +class isa8_hercules_device : + public isa8_mda_device +{ +public: + // construction/destruction + isa8_hercules_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + virtual const rom_entry *device_rom_region() const; + + virtual DECLARE_READ8_MEMBER(io_read); + virtual DECLARE_WRITE8_MEMBER(io_write); + virtual DECLARE_READ8_MEMBER(status_r); + virtual DECLARE_WRITE8_MEMBER(mode_control_w); + + virtual MC6845_UPDATE_ROW( crtc_update_row ); + MC6845_UPDATE_ROW( hercules_gfx_update_row ); + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + +private: + // internal state +public: + UINT8 m_configuration_switch; //hercules +}; + + +// device type definition +extern const device_type ISA8_HERCULES; + +// ======================> isa8_ec1840_0002_device + +class isa8_ec1840_0002_device : + public isa8_mda_device +{ +public: + // construction/destruction + isa8_ec1840_0002_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + + virtual DECLARE_WRITE8_MEMBER(mode_control_w); + + virtual MC6845_UPDATE_ROW( crtc_update_row ); + MC6845_UPDATE_ROW( mda_lowres_text_inten_update_row ); + MC6845_UPDATE_ROW( mda_lowres_text_blink_update_row ); + +protected: + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + +public: + UINT8 *m_soft_chr_gen; + +}; + +// device type definition +extern const device_type ISA8_EC1840_0002; + +#endif /* __ISA_MDA_H__ */ |