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-rw-r--r--trunk/src/emu/video/ramdac.h93
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
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+++ 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