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Diffstat (limited to 'src/mess/machine/a2videoterm.h')
-rw-r--r-- | src/mess/machine/a2videoterm.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/mess/machine/a2videoterm.h b/src/mess/machine/a2videoterm.h new file mode 100644 index 00000000000..18a8d10dc11 --- /dev/null +++ b/src/mess/machine/a2videoterm.h @@ -0,0 +1,108 @@ +/********************************************************************* + + a2videoterm.h + + Implementation of the Apple II Memory Expansion Card + +*********************************************************************/ + +#ifndef __A2BUS_VIDEOTERM__ +#define __A2BUS_VIDEOTERM__ + +#include "emu.h" +#include "machine/a2bus.h" +#include "video/mc6845.h" + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +class a2bus_videx80_device: + public device_t, + public device_a2bus_card_interface +{ +public: + // construction/destruction + a2bus_videx80_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock); + + // optional information overrides + virtual machine_config_constructor device_mconfig_additions() const; + + DECLARE_WRITE_LINE_MEMBER(vsync_changed); + + UINT8 *m_rom, *m_chrrom; + UINT8 m_ram[512*4]; + int m_framecnt; + +protected: + virtual void device_start(); + virtual void device_reset(); + + // overrides of standard a2bus slot functions + virtual UINT8 read_c0nx(address_space &space, UINT8 offset); + virtual void write_c0nx(address_space &space, UINT8 offset, UINT8 data); + virtual UINT8 read_cnxx(address_space &space, UINT8 offset); + virtual void write_cnxx(address_space &space, UINT8 offset, UINT8 data); + virtual UINT8 read_c800(address_space &space, UINT16 offset); + virtual void write_c800(address_space &space, UINT16 offset, UINT8 data); + + required_device<mc6845_device> m_crtc; + +private: + int m_rambank; +}; + +class a2bus_videoterm_device : public a2bus_videx80_device +{ +public: + a2bus_videoterm_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual const rom_entry *device_rom_region() const; +}; + +class a2bus_ap16_device : public a2bus_videx80_device +{ +public: + a2bus_ap16_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual const rom_entry *device_rom_region() const; + + virtual UINT8 read_cnxx(address_space &space, UINT8 offset); +}; + + +class a2bus_ap16alt_device : public a2bus_videx80_device +{ +public: + a2bus_ap16alt_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual const rom_entry *device_rom_region() const; + + virtual UINT8 read_cnxx(address_space &space, UINT8 offset); +}; + +class a2bus_vtc1_device : public a2bus_videx80_device +{ +public: + a2bus_vtc1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual const rom_entry *device_rom_region() const; +}; + +class a2bus_vtc2_device : public a2bus_videx80_device +{ +public: + a2bus_vtc2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + virtual const rom_entry *device_rom_region() const; +}; + +// device type definition +extern const device_type A2BUS_VIDEOTERM; +extern const device_type A2BUS_IBSAP16; +extern const device_type A2BUS_IBSAP16ALT; +extern const device_type A2BUS_VTC1; +extern const device_type A2BUS_VTC2; + +#endif /* __A2BUS_VIDEOTERM__ */ + |