summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/nes/cne.cpp
blob: 1f0ad79393704a6085e06e511c0ad913235a6048 (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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
// license:BSD-3-Clause
// copyright-holders:Fabio Priuli
/***********************************************************************************************************


 NES/Famicom cartridge emulation for C&E PCBs


 Here we emulate the following PCBs

 * C&E Decathlon [mapper 244]
 * C&E Feng Shen Bang [mapper 246]
 * C&E Sheng Huo Lie Zhuan [mapper 240]

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


#include "emu.h"
#include "cne.h"


#ifdef NES_PCB_DEBUG
#define VERBOSE 1
#else
#define VERBOSE 0
#endif

#define LOG_MMC(x) do { if (VERBOSE) logerror x; } while (0)


//-------------------------------------------------
//  constructor
//-------------------------------------------------

DEFINE_DEVICE_TYPE(NES_CNE_DECATHL, nes_cne_decathl_device, "nes_cne_deca", "NES Cart C&E Decathlon PCB")
DEFINE_DEVICE_TYPE(NES_CNE_FSB,     nes_cne_fsb_device,     "nes_cne_fsb",  "NES Cart C&E Feng Shen Bang PCB")
DEFINE_DEVICE_TYPE(NES_CNE_SHLZ,    nes_cne_shlz_device,    "nes_cne_shlz", "NES Cart C&E Sheng Huo Lie Zhuan PCB")


nes_cne_decathl_device::nes_cne_decathl_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: nes_nrom_device(mconfig, NES_CNE_DECATHL, tag, owner, clock)
{
}

nes_cne_fsb_device::nes_cne_fsb_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: nes_nrom_device(mconfig, NES_CNE_FSB, tag, owner, clock)
{
}

nes_cne_shlz_device::nes_cne_shlz_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
	: nes_nrom_device(mconfig, NES_CNE_SHLZ, tag, owner, clock)
{
}



void nes_cne_decathl_device::device_start()
{
	common_start();
}

void nes_cne_decathl_device::pcb_reset()
{
	m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM;
	prg32(0);
	chr8(0, m_chr_source);
}

void nes_cne_fsb_device::device_start()
{
	common_start();
}

void nes_cne_fsb_device::pcb_reset()
{
	m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM;
	prg32(0xff);
	chr8(0, m_chr_source);
}

void nes_cne_shlz_device::device_start()
{
	common_start();
}

void nes_cne_shlz_device::pcb_reset()
{
	m_chr_source = m_vrom_chunks ? CHRROM : CHRRAM;
	prg32(0);
	chr8(0, m_chr_source);
}




/*-------------------------------------------------
 mapper specific handlers
 -------------------------------------------------*/

/*-------------------------------------------------

 C & E Bootleg Board for Decathlon

 Games: Decathlon

 Pretty simple mapper: writes to 0x8065-0x80a4 set prg32 to
 offset & 3; writes to 0x80a5-0x80e4 set chr8 to offset & 7

 iNES: mapper 244

 In MESS: Supported.

 -------------------------------------------------*/

WRITE8_MEMBER(nes_cne_decathl_device::write_h)
{
	LOG_MMC(("cne_decathl_w, offset: %04x, data: %02x\n", offset, data));

	if (offset < 0x0065)
		return;
	if (offset < 0x00a5)
	{
		prg32((offset - 0x0065) & 0x03);
		return;
	}
	if (offset < 0x00e5)
	{
		chr8((offset - 0x00a5) & 0x07, CHRROM);
	}
}

/*-------------------------------------------------

 C & E Bootleg Board for Fong Shen Bang

 Games: Fong Shen Bang - Zhu Lu Zhi Zhan

 Simple mapper: writes to 0x6000-0x67ff set PRG and CHR banks.
 Namely, 0x6000->0x6003 select resp. prg8_89, prg8_ab, prg8_cd
 and prg8_ef. 0x6004->0x6007 select resp. crh2_0, chr2_2,
 chr2_4 and chr2_6. In 0x6800-0x7fff lies WRAM. Battery backed?

 iNES: mapper 246

 In MESS: Supported.

 -------------------------------------------------*/

WRITE8_MEMBER(nes_cne_fsb_device::write_m)
{
	LOG_MMC(("cne_fsb write_m, offset: %04x, data: %02x\n", offset, data));

	if (offset < 0x0800)
	{
		switch (offset & 0x0007)
		{
			case 0x0000:
				prg8_89(data);
				break;
			case 0x0001:
				prg8_ab(data);
				break;
			case 0x0002:
				prg8_cd(data);
				break;
			case 0x0003:
				prg8_ef(data);
				break;
			case 0x0004:
				chr2_0(data, CHRROM);
				break;
			case 0x0005:
				chr2_2(data, CHRROM);
				break;
			case 0x0006:
				chr2_4(data, CHRROM);
				break;
			case 0x0007:
				chr2_6(data, CHRROM);
				break;
		}
	}
	else
		m_battery[offset] = data;
}

READ8_MEMBER(nes_cne_fsb_device::read_m)
{
	LOG_MMC(("cne_fsb read_m, offset: %04x\n", offset));

	if (offset >= 0x0800)
		return m_battery[offset];

	return 0xff;
}

/*-------------------------------------------------

 C & E Bootleg Board for Sheng Huo Lie Zhuan

 Games: Jing Ke Xin Zhuan, Sheng Huo Lie Zhuan

 Simple Mapper: writes to 0x4020-0x5fff sets prg32 to
 data>>4 and chr8 to data&f. We currently do not map
 writes to 0x4020-0x40ff (to do: verify if this produces
 issues)

 iNES: mapper 240

 In MESS: Supported.

 -------------------------------------------------*/

WRITE8_MEMBER(nes_cne_shlz_device::write_l)
{
	LOG_MMC(("cne_shlz write_l, offset: %04x, data: %02x\n", offset, data));

	prg32(data >> 4);
	chr8(data & 0x0f, CHRROM);
}