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-rw-r--r--trunk/src/emu/machine/ram.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/ram.h b/trunk/src/emu/machine/ram.h
new file mode 100644
index 00000000000..238d7dcfabd
--- /dev/null
+++ b/trunk/src/emu/machine/ram.h
@@ -0,0 +1,88 @@
+/*************************************************************************
+
+ RAM device
+
+ Provides a configurable amount of RAM to drivers
+
+**************************************************************************/
+
+#ifndef __RAM_H__
+#define __RAM_H__
+
+
+/***************************************************************************
+ CONSTANTS
+***************************************************************************/
+
+#define RAM_TAG "ram"
+
+
+/***************************************************************************
+ DEVICE CONFIGURATION MACROS
+***************************************************************************/
+
+#define MCFG_RAM_ADD(_tag) \
+ MCFG_DEVICE_ADD(_tag, RAM, 0)
+
+#define MCFG_RAM_REMOVE(_tag) \
+ MCFG_DEVICE_REMOVE(_tag)
+
+#define MCFG_RAM_MODIFY(_tag) \
+ MCFG_DEVICE_MODIFY(_tag) \
+ ram_device::static_set_extra_options(*device, NULL);
+
+#define MCFG_RAM_DEFAULT_SIZE(_default_size) \
+ ram_device::static_set_default_size(*device, _default_size);
+
+#define MCFG_RAM_EXTRA_OPTIONS(_extra_options) \
+ ram_device::static_set_extra_options(*device, _extra_options);
+
+#define MCFG_RAM_DEFAULT_VALUE(_default_value) \
+ ram_device::static_set_default_value(*device, _default_value);
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+class ram_device : public device_t
+{
+public:
+ // construction/destruction
+ ram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // accessors
+ UINT32 size(void) const { return m_size; }
+ UINT8 *pointer(void) const { return m_pointer; }
+ static UINT32 parse_string(const char *s);
+ UINT32 default_size(void) const;
+ const char *extra_options(void) const { return m_extra_options; }
+
+ // inline configuration helpers
+ static void static_set_default_size(device_t &device, const char *default_size) { downcast<ram_device &>(device).m_default_size = default_size; }
+ static void static_set_extra_options(device_t &device, const char *extra_options) { downcast<ram_device &>(device).m_extra_options = extra_options; }
+ static void static_set_default_value(device_t &device, UINT8 default_value) { downcast<ram_device &>(device).m_default_value = default_value; }
+
+protected:
+ virtual void device_start(void);
+ virtual void device_validity_check(validity_checker &valid) const;
+
+private:
+ // device state
+ UINT32 m_size;
+ UINT8 *m_pointer;
+
+ // device config
+ const char *m_default_size;
+ const char *m_extra_options;
+ UINT8 m_default_value;
+};
+
+
+// device type definition
+extern const device_type RAM;
+
+// device iterator
+typedef device_type_iterator<&device_creator<ram_device>, ram_device> ram_device_iterator;
+
+#endif /* __RAM_H__ */