summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/vip/byteio.h
blob: 08b435ac705d882a096b1d8d7030ab062ccdc972 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************

    RCA Cosmac VIP Byte Input/Output port emulation

**********************************************************************

                            A   IN 0
                            B   IN 1
                            C   IN 2
                            D   IN 3
                            E   IN 4
                            F   IN 5
                            H   IN 6
                            J   IN 7
                            K   INST
                            L   _EF4
                            M   OUT 0
                            N   OUT 1
                            P   OUT 2
                            R   OUT 3
                            S   OUT 4
                            T   OUT 5
                            U   OUT 6
                            V   OUT 7
                            W   Q
                            X   _EF3
                            Y   +5 V
                            Z   GND

**********************************************************************/

#ifndef MAME_BUS_VIP_BYTEIO_H
#define MAME_BUS_VIP_BYTEIO_H

#pragma once



//**************************************************************************
//  CONSTANTS
//**************************************************************************

#define VIP_BYTEIO_PORT_TAG     "byteio"



//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

#define MCFG_VIP_BYTEIO_PORT_ADD(_tag, _slot_intf, _def_slot, _inst) \
	MCFG_DEVICE_ADD(_tag, VIP_BYTEIO_PORT, 0) \
	MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, false) \
	downcast<vip_byteio_port_device *>(device)->set_inst_callback(DEVCB_##_inst);



//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> vip_byteio_port_device

class device_vip_byteio_port_interface;

class vip_byteio_port_device : public device_t,
								public device_slot_interface
{
public:
	// construction/destruction
	vip_byteio_port_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	template <class Object> void set_inst_callback(Object &&inst) { m_write_inst.set_callback(std::forward<Object>(inst)); }

	// computer interface
	uint8_t in_r();
	void out_w(uint8_t data);
	DECLARE_READ_LINE_MEMBER( ef3_r );
	DECLARE_READ_LINE_MEMBER( ef4_r );
	DECLARE_WRITE_LINE_MEMBER( q_w );

	// cartridge interface
	DECLARE_WRITE_LINE_MEMBER( inst_w ) { m_write_inst(state); }

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

	devcb_write_line m_write_inst;

	device_vip_byteio_port_interface *m_cart;
};


// ======================> device_vip_byteio_port_interface

// class representing interface-specific live c64_expansion card
class device_vip_byteio_port_interface : public device_slot_card_interface
{
public:
	virtual uint8_t vip_in_r() { return 0xff; }
	virtual void vip_out_w(uint8_t data) { }

	virtual int vip_ef3_r() { return CLEAR_LINE; }
	virtual int vip_ef4_r() { return CLEAR_LINE; }

	virtual void vip_q_w(int state) { }

protected:
	// construction/destruction
	device_vip_byteio_port_interface(const machine_config &mconfig, device_t &device);

	vip_byteio_port_device *m_slot;
};


// device type definition
DECLARE_DEVICE_TYPE(VIP_BYTEIO_PORT, vip_byteio_port_device)


// slot devices
#include "vp620.h"

SLOT_INTERFACE_EXTERN( vip_byteio_cards );

#endif // MAME_BUS_VIP_BYTEIO_H