summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/at28c16.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/machine/at28c16.h')
-rw-r--r--src/devices/machine/at28c16.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/src/devices/machine/at28c16.h b/src/devices/machine/at28c16.h
new file mode 100644
index 00000000000..f8f71011347
--- /dev/null
+++ b/src/devices/machine/at28c16.h
@@ -0,0 +1,74 @@
+// license:BSD-3-Clause
+// copyright-holders:smf
+/***************************************************************************
+
+ ATMEL AT28C16
+
+ 16K ( 2K x 8 ) Parallel EEPROM
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __AT28C16_H__
+#define __AT28C16_H__
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_AT28C16_ADD( _tag, _interface ) \
+ MCFG_DEVICE_ADD( _tag, AT28C16, 0 )
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> at28c16_device
+
+class at28c16_device :
+ public device_t,
+ public device_memory_interface,
+ public device_nvram_interface
+{
+public:
+ // construction/destruction
+ at28c16_device( const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock );
+
+ // I/O operations
+ DECLARE_WRITE8_MEMBER( write );
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE_LINE_MEMBER( set_a9_12v );
+ DECLARE_WRITE_LINE_MEMBER( set_oe_12v );
+
+protected:
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_validity_check(validity_checker &valid) const;
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
+
+ // device_memory_interface overrides
+ virtual const address_space_config *memory_space_config( address_spacenum spacenum = AS_0 ) const;
+
+ // device_nvram_interface overrides
+ virtual void nvram_default();
+ virtual void nvram_read( emu_file &file );
+ virtual void nvram_write( emu_file &file );
+
+ // internal state
+ address_space_config m_space_config;
+ emu_timer *m_write_timer;
+ int m_a9_12v;
+ int m_oe_12v;
+ int m_last_write;
+};
+
+
+// device type definition
+extern const device_type AT28C16;
+
+#endif