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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/***************************************************************************
AMD AM9517A/8237A Multimode DMA Controller emulation
Copyright the MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
****************************************************************************
_____ _____
_IOR 1 |* \_/ | 40 A7
_IOW 2 | | 39 A6
_MEMR 3 | | 38 A5
_MEMW 4 | | 37 A4
* 5 | | 36 _EOP
READY 6 | | 35 A3
HACK 7 | | 34 A2
ADSTB 8 | | 33 A1
AEN 9 | | 32 A0
HREQ 10 | AM9517A | 31 Vcc
_CS 11 | 8237A | 30 DB0
CLK 12 | | 29 DB1
RESET 13 | | 28 DB2
DACK2 14 | | 27 DB3
DACK3 15 | | 26 DB4
DREQ3 16 | | 25 DACK0
DREQ2 17 | | 24 DACK1
DREQ1 18 | | 23 DB5
DREQ0 19 | | 22 DB6
Vss 20 |_____________| 21 DB7
***************************************************************************/
#pragma once
#ifndef __AM9517A__
#define __AM9517A__
#include "emu.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// ======================> am9517a_device
class am9517a_device : public device_t,
public device_execute_interface
{
public:
// construction/destruction
am9517a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb2_base &set_out_hreq_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_hreq_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_eop_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_eop_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_in_memr_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_in_memr_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_memw_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_memw_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_in_ior_0_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_in_ior_0_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_in_ior_1_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_in_ior_1_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_in_ior_2_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_in_ior_2_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_in_ior_3_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_in_ior_3_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_iow_0_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_iow_0_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_iow_1_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_iow_1_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_iow_2_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_iow_2_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_iow_3_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_iow_3_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_dack_0_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_dack_0_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_dack_1_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_dack_1_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_dack_2_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_dack_2_cb.set_callback(object); }
template<class _Object> static devcb2_base &set_out_dack_3_callback(device_t &device, _Object object) { return downcast<am9517a_device &>(device).m_out_dack_3_cb.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
DECLARE_WRITE_LINE_MEMBER( hack_w );
DECLARE_WRITE_LINE_MEMBER( ready_w );
DECLARE_WRITE_LINE_MEMBER( eop_w );
DECLARE_WRITE_LINE_MEMBER( dreq0_w );
DECLARE_WRITE_LINE_MEMBER( dreq1_w );
DECLARE_WRITE_LINE_MEMBER( dreq2_w );
DECLARE_WRITE_LINE_MEMBER( dreq3_w );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void execute_run();
int m_icount;
private:
inline void dma_request(int channel, int state);
inline bool is_request_active(int channel);
inline bool is_software_request_active(int channel);
inline void set_hreq(int state);
inline void set_dack();
inline void set_eop(int state);
inline int get_state1(bool msb_changed);
inline void dma_read();
inline void dma_write();
inline void dma_advance();
inline void end_of_process();
devcb2_write_line m_out_hreq_cb;
devcb2_write_line m_out_eop_cb;
devcb2_read8 m_in_memr_cb;
devcb2_write8 m_out_memw_cb;
devcb2_read8 m_in_ior_0_cb;
devcb2_read8 m_in_ior_1_cb;
devcb2_read8 m_in_ior_2_cb;
devcb2_read8 m_in_ior_3_cb;
devcb2_write8 m_out_iow_0_cb;
devcb2_write8 m_out_iow_1_cb;
devcb2_write8 m_out_iow_2_cb;
devcb2_write8 m_out_iow_3_cb;
devcb2_write_line m_out_dack_0_cb;
devcb2_write_line m_out_dack_1_cb;
devcb2_write_line m_out_dack_2_cb;
devcb2_write_line m_out_dack_3_cb;
struct
{
UINT16 m_address;
UINT16 m_count;
UINT16 m_base_address;
UINT16 m_base_count;
UINT8 m_mode;
} m_channel[4];
int m_msb;
int m_hreq;
int m_hack;
int m_ready;
int m_eop;
int m_state;
int m_current_channel;
int m_last_channel;
UINT8 m_command;
UINT8 m_mask;
UINT8 m_status;
UINT8 m_temp;
UINT8 m_request;
};
// device type definition
extern const device_type AM9517A;
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_AM9517A_OUT_HREQ_CB(_devcb) \
devcb = &am9517a_device::set_out_hreq_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_EOP_CB(_devcb) \
devcb = &am9517a_device::set_out_eop_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_IN_MEMR_CB(_devcb) \
devcb = &am9517a_device::set_in_memr_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_MEMW_CB(_devcb) \
devcb = &am9517a_device::set_out_memw_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_IN_IOR_0_CB(_devcb) \
devcb = &am9517a_device::set_in_ior_0_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_IN_IOR_1_CB(_devcb) \
devcb = &am9517a_device::set_in_ior_1_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_IN_IOR_2_CB(_devcb) \
devcb = &am9517a_device::set_in_ior_2_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_IN_IOR_3_CB(_devcb) \
devcb = &am9517a_device::set_in_ior_3_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_IOW_0_CB(_devcb) \
devcb = &am9517a_device::set_out_iow_0_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_IOW_1_CB(_devcb) \
devcb = &am9517a_device::set_out_iow_1_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_IOW_2_CB(_devcb) \
devcb = &am9517a_device::set_out_iow_2_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_IOW_3_CB(_devcb) \
devcb = &am9517a_device::set_out_iow_3_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_DACK_0_CB(_devcb) \
devcb = &am9517a_device::set_out_dack_0_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_DACK_1_CB(_devcb) \
devcb = &am9517a_device::set_out_dack_1_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_DACK_2_CB(_devcb) \
devcb = &am9517a_device::set_out_dack_2_callback(*device, DEVCB2_##_devcb);
#define MCFG_AM9517A_OUT_DACK_3_CB(_devcb) \
devcb = &am9517a_device::set_out_dack_3_callback(*device, DEVCB2_##_devcb);
#define MCFG_I8237_OUT_HREQ_CB MCFG_AM9517A_OUT_HREQ_CB
#define MCFG_I8237_OUT_EOP_CB MCFG_AM9517A_OUT_EOP_CB
#define MCFG_I8237_IN_MEMR_CB MCFG_AM9517A_IN_MEMR_CB
#define MCFG_I8237_OUT_MEMW_CB MCFG_AM9517A_OUT_MEMW_CB
#define MCFG_I8237_IN_IOR_0_CB MCFG_AM9517A_IN_IOR_0_CB
#define MCFG_I8237_IN_IOR_1_CB MCFG_AM9517A_IN_IOR_1_CB
#define MCFG_I8237_IN_IOR_2_CB MCFG_AM9517A_IN_IOR_2_CB
#define MCFG_I8237_IN_IOR_3_CB MCFG_AM9517A_IN_IOR_3_CB
#define MCFG_I8237_OUT_IOW_0_CB MCFG_AM9517A_OUT_IOW_0_CB
#define MCFG_I8237_OUT_IOW_1_CB MCFG_AM9517A_OUT_IOW_1_CB
#define MCFG_I8237_OUT_IOW_2_CB MCFG_AM9517A_OUT_IOW_2_CB
#define MCFG_I8237_OUT_IOW_3_CB MCFG_AM9517A_OUT_IOW_3_CB
#define MCFG_I8237_OUT_DACK_0_CB MCFG_AM9517A_OUT_DACK_0_CB
#define MCFG_I8237_OUT_DACK_1_CB MCFG_AM9517A_OUT_DACK_1_CB
#define MCFG_I8237_OUT_DACK_2_CB MCFG_AM9517A_OUT_DACK_2_CB
#define MCFG_I8237_OUT_DACK_3_CB MCFG_AM9517A_OUT_DACK_3_CB
#endif
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