summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/drivers/svmu.c
blob: 76b7c82c9650abd7e328c20e3b8c2a95cf9cd73b (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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************

        Sega Visual Memory Unit

        driver by Sandro Ronco

        TODO:
        - add more bios versions
        - serial

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

#include "emu.h"
#include "cpu/lc8670/lc8670.h"
#include "imagedev/snapquik.h"
#include "machine/intelfsh.h"
#include "sound/speaker.h"
#include "svmu.lh"

#define     PIXEL_SIZE          7
#define     PIXEL_DISTANCE      1

class svmu_state : public driver_device
{
public:
	svmu_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
			m_maincpu(*this, "maincpu"),
			m_flash(*this, "flash"),
			m_speaker(*this, "speaker")
		{ }

	required_device<lc8670_cpu_device> m_maincpu;
	required_device<intelfsh8_device> m_flash;
	required_device<speaker_sound_device> m_speaker;

	DECLARE_PALETTE_INIT(svmu);
	virtual void machine_reset();

	DECLARE_WRITE8_MEMBER(page_w);
	DECLARE_READ8_MEMBER(prog_r);
	DECLARE_WRITE8_MEMBER(prog_w);
	DECLARE_READ8_MEMBER(p1_r);
	DECLARE_WRITE8_MEMBER(p1_w);
	DECLARE_READ8_MEMBER(p7_r);
	DECLARE_QUICKLOAD_LOAD_MEMBER( svmu );

private:
	UINT8 *     m_bios;
	UINT8       m_page;
};


WRITE8_MEMBER(svmu_state::page_w)
{
	m_page = data & 0x03;
}

READ8_MEMBER(svmu_state::prog_r)
{
	if (m_page == 1)
		return m_flash->read(offset);
	else if (m_page == 2)
		return m_flash->read(0x10000 + offset);
	else
		return m_bios[offset];
}

WRITE8_MEMBER(svmu_state::prog_w)
{
	if (m_page == 1)
		m_flash->write(offset, data);
	else if (m_page == 2)
		m_flash->write(0x10000 + offset, data);
}

/*
    Port 1

    x--- ----   PWM output
    -x-- ----   BUZ
    --x- ----   SCK1
    ---x ----   SB1
    ---- x---   SO1
    ---- -x--   SCK0
    ---- --x-   SB0
    ---- ---x   SO0

*/

READ8_MEMBER(svmu_state::p1_r)
{
	return 0;
}

WRITE8_MEMBER(svmu_state::p1_w)
{
	m_speaker->level_w(BIT(data, 7));
}


/*
    Port 7

    ---- x---   ID1
    ---- -x--   ID0
    ---- --x-   battery low voltage
    ---- ---x   5V detection
*/

READ8_MEMBER(svmu_state::p7_r)
{
	return (ioport("BATTERY")->read()<<1);
}


static ADDRESS_MAP_START(svmu_mem, AS_PROGRAM, 8, svmu_state)
	AM_RANGE( 0x0000, 0xffff ) AM_READWRITE(prog_r, prog_w)
ADDRESS_MAP_END

static ADDRESS_MAP_START(svmu_io_mem, AS_IO, 8, svmu_state)
	AM_RANGE( LC8670_PORT1, LC8670_PORT1 ) AM_READWRITE(p1_r, p1_w)
	AM_RANGE( LC8670_PORT3, LC8670_PORT3 ) AM_READ_PORT("P3")
	AM_RANGE( LC8670_PORT7, LC8670_PORT7 ) AM_READ(p7_r)
ADDRESS_MAP_END

/* Input ports */
static INPUT_PORTS_START( svmu )
	PORT_START( "P3" )
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP) PORT_NAME("Up")
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN) PORT_NAME("Down")
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT) PORT_NAME("Left")
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT) PORT_NAME("Right")
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("Button A")
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("Button B")
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("MODE")   PORT_CODE( KEYCODE_M )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("SLEEP")  PORT_CODE( KEYCODE_S )
	PORT_START("BATTERY")
	PORT_CONFNAME( 0x01, 0x01, "Battery" )
	PORT_CONFSETTING( 0x01, "Good" )
	PORT_CONFSETTING( 0x00, "Poor" )
INPUT_PORTS_END

void svmu_state::machine_reset()
{
	m_bios = (UINT8*)(*memregion("bios"));
	m_page = 0;
}

PALETTE_INIT_MEMBER(svmu_state, svmu)
{
	palette.set_pen_color(0, rgb_t(138, 146, 148));
	palette.set_pen_color(1, rgb_t(92, 83, 88));
}

static LC8670_LCD_UPDATE( svmu_lcd_update )
{
	if (lcd_enabled)
	{
		for (int y=0; y<32; y++)
			for (int x=0; x<6; x++)
			{
				int gfx = vram[y*6 + x];

				for (int b=0; b<8; b++)
					bitmap.plot_box((x*8 + b) * (PIXEL_SIZE + PIXEL_DISTANCE), y * (PIXEL_SIZE + PIXEL_DISTANCE), PIXEL_SIZE, PIXEL_SIZE, BIT(gfx,7-b));
			}
	}
	else
	{
		bitmap.fill(0, cliprect);
	}

	output_set_value("file_icon" , lcd_enabled ? BIT(vram[0xc1],6) : 0);
	output_set_value("game_icon" , lcd_enabled ? BIT(vram[0xc2],4) : 0);
	output_set_value("clock_icon", lcd_enabled ? BIT(vram[0xc3],2) : 0);
	output_set_value("flash_icon", lcd_enabled ? BIT(vram[0xc4],0) : 0);

	return 0;
}


inline void vmufat_write_byte(UINT8* flash, UINT8 block, offs_t offset, UINT8 data)
{
	flash[(block * 512) + offset] = data;
}

inline void vmufat_write_word(UINT8* flash, UINT8 block, offs_t offset, UINT16 data)
{
	// 16-bit data are stored in little endian
	flash[(block * 512) + offset + 0] = data & 0xff;
	flash[(block * 512) + offset + 1] = (data>>8) & 0xff;
}

QUICKLOAD_LOAD_MEMBER( svmu_state, svmu )
{
	UINT32 size = image.length();
	UINT8 *flash = (UINT8*)m_flash->space().get_read_ptr(0);

	image.fread(flash, size);

	// verify if image is already a valid VMUFAT file system
	bool valid_vmufat = true;
	if (size == 0x20000)
	{
		for (int i=0; i<0x10; i++)
			if (flash[255 * 512 + i] != 0x55)
			{
				valid_vmufat = false;
				break;
			}
	}
	else
	{
		valid_vmufat = false;
	}

	if (!valid_vmufat)
	{
		// more info about the VMUFAT here: http://mc.pp.se/dc/vms/flashmem.html

		//-------------------------------- Formatting --------------------------------
		memset(flash + 241*512, 0, 15*512);                 // clears the last 15 blocks that contain file system information

		for (int i=0; i<0x10; i++)
			vmufat_write_byte(flash, 255, i, 0x55);         // first 16 bytes should be 0x55 to indicate a properly formatted card

		vmufat_write_byte(flash, 255, 0x10, 0x00);          // custom VMS colour (1 = use custom colours, 0 = standard colour)
		vmufat_write_byte(flash, 255, 0x11, 0x00);          // VMS colour blue component
		vmufat_write_byte(flash, 255, 0x12, 0x00);          // VMS colour green component
		vmufat_write_byte(flash, 255, 0x13, 0x00);          // VMS colour red component
		vmufat_write_byte(flash, 255, 0x14, 0x00);          // VMS colour alpha component
		vmufat_write_byte(flash, 255, 0x30, 0x19);          // Century (BCD)
		vmufat_write_byte(flash, 255, 0x31, 0x99);          // Year (BCD)
		vmufat_write_byte(flash, 255, 0x32, 0x01);          // Month (BCD)
		vmufat_write_byte(flash, 255, 0x33, 0x01);          // Day (BCD)
		vmufat_write_byte(flash, 255, 0x34, 0x00);          // Hour (BCD)
		vmufat_write_byte(flash, 255, 0x35, 0x00);          // Minute (BCD)
		vmufat_write_byte(flash, 255, 0x36, 0x00);          // Second (BCD)
		vmufat_write_byte(flash, 255, 0x37, 0x00);          // Day of week (0 = Monday, 6 = Sunday)
		vmufat_write_word(flash, 255, 0x44, 0x00ff);        // location of Root
		vmufat_write_word(flash, 255, 0x46, 0x00fe);        // location of FAT (254)
		vmufat_write_word(flash, 255, 0x48, 0x0001);        // size of FAT in blocks (1)
		vmufat_write_word(flash, 255, 0x4a, 0x00fd);        // location of Directory (253)
		vmufat_write_word(flash, 255, 0x4c, 0x000d);        // size of Directory in blocks (13)
		vmufat_write_word(flash, 255, 0x4e, 0x0000);        // icon shape for this VMS (0-123)
		vmufat_write_word(flash, 255, 0x50, 0x00c8);        // number of user blocks (200)

		for (int i=0; i<256; i++)
			vmufat_write_word(flash, 254, i<<1, 0xfffc);    // marks all blocks as unallocated

		for (int i=253; i>241; --i)
			vmufat_write_word(flash, 254, i<<1, i - 1);     // marsk all Directory blocks as allocate

		vmufat_write_word(flash, 254, 0x1e2, 0xfffa);       // marks last Directory block
		vmufat_write_word(flash, 254, 0x1fc, 0xfffa);       // marks FAT block as allocated
		vmufat_write_word(flash, 254, 0x1fe, 0xfffa);       // marks Root block as allocated

		//-------------------------------- Create the vms file --------------------------------
		int vms_blocks = (size / 512) + (size & 0x1ff ? 1 : 0); // number of blocks required for store the vms file

		for (int i=0; i<vms_blocks - 1; i++)
			vmufat_write_word(flash, 254, i<<1, i + 1);     // marks blocks where the file is allocated

		vmufat_write_word(flash, 254, (vms_blocks-1)<<1, 0xfffa);   // last block for this file

		vmufat_write_byte(flash, 253, 0x00, 0xcc);          // file type (0x00 = no file, 0x33 = data, 0xcc = game)
		vmufat_write_byte(flash, 253, 0x01, 0x00);          // copy protect (0x00 = no, 0xff = yes)
		vmufat_write_word(flash, 253, 0x02, 0x0000);        // location of first file block

		const char *vms_filename = image.basename_noext();
		for (int i=0; i<12; i++)
		{
			if (i < strlen(vms_filename))
				vmufat_write_byte(flash, 253, i + 4, vms_filename[i]);  // 12 bytes filename
			else
				vmufat_write_byte(flash, 253, i + 4, 0x20);             // space padded
		}

		vmufat_write_byte(flash, 253, 0x10, 0x19);          // Century (BCD)
		vmufat_write_byte(flash, 253, 0x11, 0x99);          // Year (BCD)
		vmufat_write_byte(flash, 253, 0x12, 0x01);          // Month (BCD)
		vmufat_write_byte(flash, 253, 0x13, 0x01);          // Day (BCD)
		vmufat_write_byte(flash, 253, 0x14, 0x00);          // Hour (BCD)
		vmufat_write_byte(flash, 253, 0x15, 0x00);          // Minute (BCD)
		vmufat_write_byte(flash, 253, 0x16, 0x00);          // Second (BCD)
		vmufat_write_byte(flash, 253, 0x17, 0x00);          // Day of week (0 = Monday, 6 = Sunday)
		vmufat_write_word(flash, 253, 0x18, vms_blocks);    // file size (in blocks)
		vmufat_write_word(flash, 253, 0x1a, 0x0001);        // offset of header (in blocks) from file start
	}

	return IMAGE_INIT_PASS;
}


static MACHINE_CONFIG_START( svmu, svmu_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", LC8670, XTAL_32_768kHz)
	MCFG_CPU_PROGRAM_MAP(svmu_mem)
	MCFG_CPU_IO_MAP(svmu_io_mem)

	/* specific LC8670 configurations */
	MCFG_LC8670_SET_CLOCK_SOURCES(XTAL_32_768kHz, 600000, XTAL_6MHz)    // tolerance range of the RC oscillator is 600kHz to 1200kHz
	MCFG_LC8670_BANKSWITCH_CB(WRITE8(svmu_state, page_w))
	MCFG_LC8670_LCD_UPDATE_CB(svmu_lcd_update)

	/* video hardware */
	MCFG_SCREEN_ADD("screen", LCD)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) // not accurate
	MCFG_SCREEN_SIZE(48 * (PIXEL_SIZE + PIXEL_DISTANCE), 32 * (PIXEL_SIZE + PIXEL_DISTANCE))
	MCFG_SCREEN_VISIBLE_AREA(0, 48*(PIXEL_SIZE + PIXEL_DISTANCE) - 1, 0, 32*(PIXEL_SIZE + PIXEL_DISTANCE) - 1)
	MCFG_SCREEN_UPDATE_DEVICE("maincpu", lc8670_cpu_device, screen_update)
	MCFG_DEFAULT_LAYOUT(layout_svmu)
	MCFG_PALETTE_ADD("palette", 2)
	MCFG_PALETTE_INIT_OWNER(svmu_state, svmu)

	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)

	/* devices */
	MCFG_ATMEL_29C010_ADD("flash")
	MCFG_QUICKLOAD_ADD("quickload", svmu_state, svmu, "vms,bin", 0)
	MCFG_QUICKLOAD_INTERFACE("svmu_quik")

	/* Software lists */
	MCFG_SOFTWARE_LIST_ADD("quik_list", "svmu")
MACHINE_CONFIG_END


/* ROM definition */
ROM_START( svmu )
	ROM_REGION( 0x10000, "bios", 0 )
	ROM_DEFAULT_BIOS("jp1004")
	// these ROMs come from the Sega Katana SDK and are scrambled, a simple way to restore it is to remove the first 4 bytes and xor the whole file for the xor key.
	ROM_SYSTEM_BIOS(0, "jp1001", "VMS Japanese BIOS (v1.001)")
	ROMX_LOAD("vmu1001.bin", 0x0000, 0x10000, CRC(e6339f4a) SHA1(688b2e1ff8c60bde6e8b07a2d2695cdacc07bd0c), ROM_BIOS(1))
	ROM_SYSTEM_BIOS(1, "jp1002", "VMS Japanese BIOS (v1.002)")
	ROMX_LOAD("vmu1002.bin", 0x0000, 0x10000, CRC(6c020d48) SHA1(9ee7c87d7b033235e0b315a0b421e70deb547c7a), ROM_BIOS(2))
	ROM_SYSTEM_BIOS(2, "jp1004", "VMS Japanese BIOS (v1.004)")
	ROMX_LOAD("vmu1004.bin", 0x0000, 0x10000, CRC(8e0f867a) SHA1(dc2fa2963138a1049a43f7f36439ad0a416ee8b4), ROM_BIOS(3))    // from Sega Katana SDK (original file: fbios.sbf, CRC: c7c77b3c, xor key: 0x37)
	ROM_SYSTEM_BIOS(3, "jp1005", "VMS Japanese BIOS (v1.005)")
	ROMX_LOAD("vmu1005.bin", 0x0000, 0x10000, CRC(47623324) SHA1(fca1aceff8a2f8c6826f3a865f4d5ef88dfd9ed1), ROM_BIOS(4))
	ROM_SYSTEM_BIOS(4, "dev1004", "VMS Japanese Dev BIOS (v1.004)") // automatically boot the first game found in the flash
	ROMX_LOAD( "vmsdev1004.bin", 0x0000, 0x10000, CRC(395e25f2) SHA1(37dea034322b5b80b35b2de784298d32c71ba7a3), ROM_BIOS(5))    // from Sega Katana SDK (original file: qbios.sbf, CRC: eed5524c, xor key: 0x43)
ROM_END


/* Driver */

/*  YEAR  NAME  PARENT  COMPAT   MACHINE    INPUT   INIT    COMPANY   FULLNAME     FLAGS */
COMP( 1998, svmu,   0,  0,  svmu ,  svmu , driver_device,   0, "Sega",   "Visual Memory Unit",  GAME_NOT_WORKING | GAME_NO_SOUND)