summaryrefslogtreecommitdiffstatshomepage
path: root/src/emu/machine/k033906.c
blob: 44665bd26a7d2fd6dca30224dcb55e76cd781688 (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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/***************************************************************************

    Konami IC 033906 (PCI bridge)

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

#include "emu.h"
#include "k033906.h"
#include "video/voodoo.h"

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

typedef struct _k033906_state k033906_state;
struct _k033906_state
{
	UINT32 *     reg;
	UINT32 *     ram;

	int          reg_set;	// 1 = access reg / 0 = access ram

	const device_config *voodoo;
};

/*****************************************************************************
    INLINE FUNCTIONS
*****************************************************************************/

INLINE k033906_state *k033906_get_safe_token( const device_config *device )
{
	assert(device != NULL);
	assert(device->token != NULL);
	assert(device->type == K033906);

	return (k033906_state *)device->token;
}

INLINE const k033906_interface *k033906_get_interface( const device_config *device )
{
	assert(device != NULL);
	assert((device->type == K033906));
	return (const k033906_interface *) device->static_config;
}

/*****************************************************************************
    DEVICE HANDLERS
*****************************************************************************/

void k033906_set_reg( const device_config *device, int state )
{
	k033906_state *k033906 = k033906_get_safe_token(device);
	k033906->reg_set = state;
}

static UINT32 k033906_reg_r( const device_config *device, int reg )
{
	k033906_state *k033906 = k033906_get_safe_token(device);

	switch (reg)
	{
		case 0x00:		return 0x0001121a;			// PCI Vendor ID (0x121a = 3dfx), Device ID (0x0001 = Voodoo)
		case 0x02:		return 0x04000000;			// Revision ID
		case 0x04:		return k033906->reg[0x04];		// memBaseAddr
		case 0x0f:		return k033906->reg[0x0f];		// interrupt_line, interrupt_pin, min_gnt, max_lat

		default:
			fatalerror("%s: k033906_reg_r: %08X", cpuexec_describe_context(device->machine), reg);
	}
	return 0;
}

static void k033906_reg_w( const device_config *device, int reg, UINT32 data )
{
	k033906_state *k033906 = k033906_get_safe_token(device);

	switch (reg)
	{
		case 0x00:
			break;

		case 0x01:		// command register
			break;

		case 0x04:		// memBaseAddr
		{
			if (data == 0xffffffff)
				k033906->reg[0x04] = 0xff000000;
			else
				k033906->reg[0x04] = data & 0xff000000;
			break;
		}

		case 0x0f:		// interrupt_line, interrupt_pin, min_gnt, max_lat
		{
			k033906->reg[0x0f] = data;
			break;
		}

		case 0x10:		// initEnable
		{
			voodoo_set_init_enable(k033906->voodoo, data);
			break;
		}

		case 0x11:		// busSnoop0
		case 0x12:		// busSnoop1
			break;

		case 0x38:		// ???
			break;

		default:
			fatalerror("%s:K033906_w: %08X, %08X", cpuexec_describe_context(device->machine), data, reg);
	}
}

READ32_DEVICE_HANDLER( k033906_r )
{
	k033906_state *k033906 = k033906_get_safe_token(device);

	if (k033906->reg_set)
		return k033906_reg_r(device, offset);
	else
		return k033906->ram[offset];
}

WRITE32_DEVICE_HANDLER( k033906_w )
{
	k033906_state *k033906 = k033906_get_safe_token(device);

	if (k033906->reg_set)
		k033906_reg_w(device, offset, data);
	else
		k033906->ram[offset] = data;
}


/*****************************************************************************
    DEVICE INTERFACE
*****************************************************************************/

static DEVICE_START( k033906 )
{
	k033906_state *k033906 = k033906_get_safe_token(device);
	const k033906_interface *intf = k033906_get_interface(device);

	k033906->voodoo = devtag_get_device(device->machine, intf->voodoo);

	k033906->reg = auto_alloc_array(device->machine, UINT32, 256);
	k033906->ram = auto_alloc_array(device->machine, UINT32, 32768);

	k033906->reg_set = 0;

	state_save_register_device_item_pointer(device, 0, k033906->reg, 256);
	state_save_register_device_item_pointer(device, 0, k033906->ram, 32768);
	state_save_register_device_item(device, 0, k033906->reg_set);
}

/*-------------------------------------------------
    device definition
-------------------------------------------------*/

static const char DEVTEMPLATE_SOURCE[] = __FILE__;

#define DEVTEMPLATE_ID( p, s )	p##k033906##s
#define DEVTEMPLATE_FEATURES	      DT_HAS_START
#define DEVTEMPLATE_NAME		"Konami 033906"
#define DEVTEMPLATE_FAMILY		"Konami PCI Bridge 033906"
#define DEVTEMPLATE_CLASS		DEVICE_CLASS_PERIPHERAL
#include "devtempl.h"