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author Miodrag Milanovic <mmicko@gmail.com>2015-09-13 08:41:44 +0200
committer Miodrag Milanovic <mmicko@gmail.com>2015-09-13 08:41:44 +0200
commitf88cefad27a1737c76e09d99c9fb43e173506081 (patch)
tree2d8167d03579c46e226471747eb4407bd00ed6fa /src/devices/machine/i8243.h
parente92ac9e0fa8e99869894bea00589bbb526be30aa (diff)
Move all devices into separate part of src tree (nw)
Diffstat (limited to 'src/devices/machine/i8243.h')
-rw-r--r--src/devices/machine/i8243.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/src/devices/machine/i8243.h b/src/devices/machine/i8243.h
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+++ b/src/devices/machine/i8243.h
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+// license:BSD-3-Clause
+// copyright-holders:Aaron Giles
+/***************************************************************************
+
+ i8243.h
+
+ Intel 8243 Port Expander
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __I8243_H__
+#define __I8243_H__
+
+#include "emu.h"
+#include "cpu/mcs48/mcs48.h"
+
+
+
+/***************************************************************************
+ DEVICE CONFIGURATION MACROS
+***************************************************************************/
+
+#define MCFG_I8243_ADD(_tag, _read, _write) \
+ MCFG_DEVICE_ADD(_tag, I8243, 0) \
+ MCFG_I8243_READHANDLER(_read) \
+ MCFG_I8243_WRITEHANDLER(_write)
+#define MCFG_I8243_READHANDLER(_devcb) \
+ devcb = &i8243_device::set_read_handler(*device, DEVCB_##_devcb);
+#define MCFG_I8243_WRITEHANDLER(_devcb) \
+ devcb = &i8243_device::set_write_handler(*device, DEVCB_##_devcb);
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+
+// ======================> i8243_device
+
+class i8243_device : public device_t
+{
+public:
+ // construction/destruction
+ i8243_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // static configuration helpers
+ template<class _Object> static devcb_base &set_read_handler(device_t &device, _Object object) { return downcast<i8243_device &>(device).m_readhandler.set_callback(object); }
+ template<class _Object> static devcb_base &set_write_handler(device_t &device, _Object object) { return downcast<i8243_device &>(device).m_writehandler.set_callback(object); }
+
+ DECLARE_READ8_MEMBER(i8243_p2_r);
+ DECLARE_WRITE8_MEMBER(i8243_p2_w);
+
+ DECLARE_WRITE8_MEMBER(i8243_prog_w);
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_post_load() { }
+ virtual void device_clock_changed() { }
+
+private:
+
+ UINT8 m_p[4]; /* 4 ports' worth of data */
+ UINT8 m_p2out; /* port 2 bits that will be returned */
+ UINT8 m_p2; /* most recent port 2 value */
+ UINT8 m_opcode; /* latched opcode */
+ UINT8 m_prog; /* previous PROG state */
+
+ devcb_read8 m_readhandler;
+ devcb_write8 m_writehandler;
+};
+
+
+// device type definition
+extern const device_type I8243;
+
+#endif /* __I8243_H__ */