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Diffstat (limited to 'trunk/src/emu/video/ramdac.h')
-rw-r--r-- | trunk/src/emu/video/ramdac.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/trunk/src/emu/video/ramdac.h b/trunk/src/emu/video/ramdac.h new file mode 100644 index 00000000000..97d28462ce8 --- /dev/null +++ b/trunk/src/emu/video/ramdac.h @@ -0,0 +1,93 @@ +/*************************************************************************** + + Generic Palette RAMDAC device + +***************************************************************************/ + +#pragma once + +#ifndef __ramdacDEV_H__ +#define __ramdacDEV_H__ + +#include "emu.h" + + +//************************************************************************** +// INTERFACE CONFIGURATION MACROS +//************************************************************************** + +#define MCFG_RAMDAC_ADD(_tag,_config,_map) \ + MCFG_DEVICE_ADD(_tag, RAMDAC, 0) \ + MCFG_DEVICE_CONFIG(_config) \ + MCFG_DEVICE_ADDRESS_MAP(AS_0, _map) + +#define RAMDAC_INTERFACE(name) \ + const ramdac_interface (name) = + +// ======================> ramdac_interface + +struct ramdac_interface +{ + UINT8 m_split_read_reg; // read register index is separated, seen in rltennis +}; + +//************************************************************************** +// TYPE DEFINITIONS +//************************************************************************** + +// ======================> ramdac_device + +class ramdac_device : public device_t, + public device_memory_interface, + public ramdac_interface +{ +public: + // construction/destruction + ramdac_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + + // I/O operations + DECLARE_READ8_MEMBER( index_r ); + DECLARE_READ8_MEMBER( pal_r ); + DECLARE_WRITE8_MEMBER( index_w ); + DECLARE_WRITE8_MEMBER( index_r_w ); + DECLARE_WRITE8_MEMBER( pal_w ); + DECLARE_WRITE8_MEMBER( mask_w ); + + DECLARE_READ8_MEMBER( ramdac_pal_r ); + DECLARE_WRITE8_MEMBER( ramdac_rgb666_w ); + DECLARE_WRITE8_MEMBER( ramdac_rgb888_w ); + + virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const; + +protected: + // device-level overrides + virtual void device_validity_check(validity_checker &valid) const; + virtual void device_start(); + virtual void device_reset(); + virtual void device_config_complete(); + inline UINT8 readbyte(offs_t address); + inline void writebyte(offs_t address, UINT8 data); + inline void reg_increment(UINT8 inc_type); + +private: + UINT8 m_pal_index[2]; + UINT8 m_pal_mask; + UINT8 m_int_index[2]; + UINT8 *m_palram; + + const address_space_config m_space_config; +}; + + +// device type definition +extern const device_type RAMDAC; + + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + + + +#endif |