summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/glass.c
blob: 8a4e6053d65b43922a882d6ae36b48c31216d92c (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
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
/***************************************************************************

Glass (c) 1993 Gaelco (Developed by OMK. Produced by Gaelco)

Driver by Manuel Abadia <manu@teleline.es>

The DS5002FP has up to 128KB undumped gameplay code making the game unplayable :_(

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

#include "emu.h"
#include "cpu/m68000/m68000.h"
#include "sound/okim6295.h"
#include "includes/glass.h"

WRITE16_MEMBER(glass_state::clr_int_w)
{
	m_cause_interrupt = 1;
}

INTERRUPT_GEN_MEMBER(glass_state::glass_interrupt)
{

	if (m_cause_interrupt)
	{
		device.execute().set_input_line(6, HOLD_LINE);
		m_cause_interrupt = 0;
	}
}


static const gfx_layout glass_tilelayout16 =
{
	16,16,									/* 16x16 tiles */
	0x100000/32,							/* number of tiles */
	4,										/* 4 bpp */
	{ 3*0x100000*8, 2*0x100000*8, 1*0x100000*8, 0*0x100000*8 },
	{
		0, 1, 2, 3, 4, 5, 6, 7,
		16*8+0, 16*8+1, 16*8+2, 16*8+3, 16*8+4, 16*8+5, 16*8+6, 16*8+7
	},
	{
		0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8,
		8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, 15*8
	},
	32*8
};

static GFXDECODE_START( glass )
	GFXDECODE_ENTRY( "gfx1", 0x000000, glass_tilelayout16, 0, 64 )
GFXDECODE_END


WRITE16_MEMBER(glass_state::OKIM6295_bankswitch_w)
{
	UINT8 *RAM = memregion("oki")->base();

	if (ACCESSING_BITS_0_7)
		memcpy(&RAM[0x30000], &RAM[0x40000 + (data & 0x0f) * 0x10000], 0x10000);
}

WRITE16_MEMBER(glass_state::glass_coin_w)
{
	switch (offset >> 3)
	{
		case 0x00:	/* Coin Lockouts */
		case 0x01:
			coin_lockout_w(machine(), (offset >> 3) & 0x01, ~data & 0x01);
			break;
		case 0x02:	/* Coin Counters */
		case 0x03:
			coin_counter_w(machine(), (offset >> 3) & 0x01, data & 0x01);
			break;
		case 0x04:	/* Sound Muting (if bit 0 == 1, sound output stream = 0) */
			break;
	}
}

static ADDRESS_MAP_START( glass_map, AS_PROGRAM, 16, glass_state )
	AM_RANGE(0x000000, 0x07ffff) AM_ROM																		/* ROM */
	AM_RANGE(0x100000, 0x101fff) AM_RAM_WRITE(glass_vram_w) AM_SHARE("videoram")							/* Video RAM */
	AM_RANGE(0x102000, 0x102fff) AM_RAM																		/* Extra Video RAM */
	AM_RANGE(0x108000, 0x108007) AM_WRITEONLY AM_SHARE("vregs")												/* Video Registers */
	AM_RANGE(0x108008, 0x108009) AM_WRITE(clr_int_w)														/* CLR INT Video */
	AM_RANGE(0x200000, 0x2007ff) AM_RAM_WRITE(paletteram_xBBBBBGGGGGRRRRR_word_w) AM_SHARE("paletteram")	/* Palette */
	AM_RANGE(0x440000, 0x440fff) AM_RAM AM_SHARE("spriteram")												/* Sprite RAM */
	AM_RANGE(0x700000, 0x700001) AM_READ_PORT("DSW2")
	AM_RANGE(0x700002, 0x700003) AM_READ_PORT("DSW1")
	AM_RANGE(0x700004, 0x700005) AM_READ_PORT("P1")
	AM_RANGE(0x700006, 0x700007) AM_READ_PORT("P2")
	AM_RANGE(0x700008, 0x700009) AM_WRITE(glass_blitter_w)													/* serial blitter */
	AM_RANGE(0x70000c, 0x70000d) AM_WRITE(OKIM6295_bankswitch_w)											/* OKI6295 bankswitch */
	AM_RANGE(0x70000e, 0x70000f) AM_DEVREADWRITE8("oki", okim6295_device, read, write, 0x00ff)				/* OKI6295 status register */
	AM_RANGE(0x70000a, 0x70004b) AM_WRITE(glass_coin_w)														/* Coin Counters/Lockout */
	AM_RANGE(0xfec000, 0xfeffff) AM_RAM AM_SHARE("mainram")													/* Work RAM (partially shared with DS5002FP) */
ADDRESS_MAP_END


static INPUT_PORTS_START( glass )
	PORT_START("DSW1")
	PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) ) PORT_DIPLOCATION("SW1:6,7,8")
	PORT_DIPSETTING(    0x07, DEF_STR( 1C_1C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 3C_4C ) )
	PORT_DIPSETTING(    0x01, DEF_STR( 2C_3C ) )
	PORT_DIPSETTING(    0x06, DEF_STR( 1C_2C ) )
	PORT_DIPSETTING(    0x05, DEF_STR( 1C_3C ) )
	PORT_DIPSETTING(    0x04, DEF_STR( 1C_4C ) )
	PORT_DIPSETTING(    0x03, DEF_STR( 1C_5C ) )
	PORT_DIPSETTING(    0x02, DEF_STR( 1C_6C ) )
	PORT_DIPNAME( 0x38, 0x38, DEF_STR( Coin_B ) ) PORT_DIPLOCATION("SW1:3,4,5")
	PORT_DIPSETTING(    0x10, DEF_STR( 6C_1C ) )
	PORT_DIPSETTING(    0x18, DEF_STR( 5C_1C ) )
	PORT_DIPSETTING(    0x20, DEF_STR( 4C_1C ) )
	PORT_DIPSETTING(    0x28, DEF_STR( 3C_1C ) )
	PORT_DIPSETTING(    0x30, DEF_STR( 2C_1C ) )
	PORT_DIPSETTING(    0x08, DEF_STR( 3C_2C ) )
	PORT_DIPSETTING(    0x00, DEF_STR( 4C_3C ) )
	PORT_DIPSETTING(    0x38, DEF_STR( 1C_1C ) )
	PORT_DIPNAME( 0x40, 0x40, "Credit configuration" ) PORT_DIPLOCATION("SW1:2")
	PORT_DIPSETTING(    0x40, "Start 1C" )
	PORT_DIPSETTING(    0x00, "Start 2C" )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Free_Play ) ) PORT_DIPLOCATION("SW1:1")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("DSW2")
	PORT_DIPNAME( 0x03, 0x03, DEF_STR( Difficulty ) ) PORT_DIPLOCATION("SW2:7,8")
	PORT_DIPSETTING(    0x02, DEF_STR( Easy ) )
	PORT_DIPSETTING(    0x03, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x01, DEF_STR( Hard ) )
	PORT_DIPSETTING(    0x00, DEF_STR( Hardest ) )
	PORT_DIPNAME( 0x0c, 0x0c, DEF_STR( Lives ) ) PORT_DIPLOCATION("SW2:5,6")
	PORT_DIPSETTING(    0x0c, "3" )
	PORT_DIPSETTING(    0x08, "1" )
	PORT_DIPSETTING(    0x04, "2" )
	PORT_DIPSETTING(    0x00, "4" )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Version ) ) PORT_DIPLOCATION("SW2:4")
	PORT_DIPSETTING(    0x10, DEF_STR( Normal ) )
	PORT_DIPSETTING(    0x00, "Light" )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:3")
	PORT_DIPSETTING(    0x00, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x20, DEF_STR( On ) )
	PORT_DIPUNUSED_DIPLOC( 0x40, 0x40, "SW2:2" ) /* Listed as "Unused" */
	PORT_SERVICE_DIPLOC( 0x80, IP_ACTIVE_LOW, "SW2:1" )

	PORT_START("P1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(1)
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(1)
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_COIN2 )

	PORT_START("P2")
	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_8WAY PORT_PLAYER(2)
	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_PLAYER(2)
	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_START1 )
	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_START2 )
	PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(1)
	PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_PLAYER(2)
	PORT_BIT( 0xfc00, IP_ACTIVE_LOW, IPT_UNKNOWN )
INPUT_PORTS_END



void glass_state::machine_start()
{

	save_item(NAME(m_cause_interrupt));
	save_item(NAME(m_current_bit));
	save_item(NAME(m_current_command));
	save_item(NAME(m_blitter_serial_buffer));
}

void glass_state::machine_reset()
{
	int i;

	m_cause_interrupt = 1;
	m_current_bit = 0;
	m_current_command = 0;

	for (i = 0; i < 5; i++)
		m_blitter_serial_buffer[i] = 0;
}

static MACHINE_CONFIG_START( glass, glass_state )

	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", M68000,24000000/2)		/* 12 MHz (M680000 P12) */
	MCFG_CPU_PROGRAM_MAP(glass_map)
	MCFG_CPU_VBLANK_INT_DRIVER("screen", glass_state,  glass_interrupt)


	/* video hardware */
	MCFG_SCREEN_ADD("screen", RASTER)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
	MCFG_SCREEN_SIZE(32*16, 32*16)
	MCFG_SCREEN_VISIBLE_AREA(0, 368-1, 16, 256-1)
	MCFG_SCREEN_UPDATE_DRIVER(glass_state, screen_update_glass)

	MCFG_GFXDECODE(glass)
	MCFG_PALETTE_LENGTH(1024)


	/* sound hardware */
	MCFG_SPEAKER_STANDARD_MONO("mono")

	MCFG_OKIM6295_ADD("oki", 1056000, OKIM6295_PIN7_HIGH) // clock frequency & pin 7 not verified
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END

ROM_START( glass ) /* Version 1.1 */
	ROM_REGION( 0x080000, "maincpu", 0 )	/* 68000 code */
	ROM_LOAD16_BYTE( "1.c23", 0x000000, 0x040000, CRC(aeebd4ed) SHA1(04759dc146dff0fc74b78d70e79dfaebe68328f9) )
	ROM_LOAD16_BYTE( "2.c22", 0x000001, 0x040000, CRC(165e2e01) SHA1(180a2e2b5151f2321d85ac23eff7fbc9f52023a5) )

	ROM_REGION( 0x400000, "gfx1", ROMREGION_ERASE00 )	/* Graphics */
	/* 0x000000-0x3fffff filled in later in the DRIVER_INIT */

	ROM_REGION( 0x400000, "gfx2", 0 )	/* Graphics */
	ROM_LOAD( "h13.bin", 0x000000, 0x200000, CRC(13ab7f31) SHA1(468424f74d6cccd1b445a9f20e2d24bc46d61ed6) )
	ROM_LOAD( "h11.bin", 0x200000, 0x200000, CRC(c6ac41c8) SHA1(22408ef1e35c66d0fba0c72972c46fad891d1193) )

	ROM_REGION( 0x100000, "gfx3", 0 )	/* 16 bitmaps (320x200, indexed colors) */
	ROM_LOAD( "h9.bin", 0x000000, 0x100000, CRC(b9492557) SHA1(3f5c0d696d65e1cd492763dfa749c813dd56a9bf) )

	ROM_REGION( 0x140000, "oki", 0 )	/* ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "c1.bin", 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
	/* 0x00000-0x2ffff is fixed, 0x30000-0x3ffff is bank switched from all the ROMs */
	ROM_RELOAD(         0x040000, 0x100000 )
ROM_END

ROM_START( glass10 ) /* Version 1.0 */
	ROM_REGION( 0x080000, "maincpu", 0 )	/* 68000 code */
	ROM_LOAD16_BYTE( "c23.bin", 0x000000, 0x040000, CRC(688cdf33) SHA1(b59dcc3fc15f72037692b745927b110e97d8282e) )
	ROM_LOAD16_BYTE( "c22.bin", 0x000001, 0x040000, CRC(ab17c992) SHA1(1509b5b4bbfb4e022e0ab6fbbc0ffc070adfa531) )

	ROM_REGION( 0x400000, "gfx1", ROMREGION_ERASE00 )	/* Graphics */
	/* 0x000000-0x3fffff filled in later in the DRIVER_INIT */

	ROM_REGION( 0x400000, "gfx2", 0 )	/* Graphics */
	ROM_LOAD( "h13.bin", 0x000000, 0x200000, CRC(13ab7f31) SHA1(468424f74d6cccd1b445a9f20e2d24bc46d61ed6) )
	ROM_LOAD( "h11.bin", 0x200000, 0x200000, CRC(c6ac41c8) SHA1(22408ef1e35c66d0fba0c72972c46fad891d1193) )

	ROM_REGION( 0x100000, "gfx3", 0 )	/* 16 bitmaps (320x200, indexed colors) */
	ROM_LOAD( "h9.bin", 0x000000, 0x100000, CRC(b9492557) SHA1(3f5c0d696d65e1cd492763dfa749c813dd56a9bf) )

	ROM_REGION( 0x140000, "oki", 0 )	/* ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "c1.bin", 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
	/* 0x00000-0x2ffff is fixed, 0x30000-0x3ffff is bank switched from all the ROMs */
	ROM_RELOAD(         0x040000, 0x100000 )
ROM_END

ROM_START( glassbrk ) /* Title screen shows "GLASS" and under that "Break Edition" on a real PCB */
	ROM_REGION( 0x080000, "maincpu", 0 )	/* 68000 code */
	ROM_LOAD16_BYTE( "spl-c23.bin", 0x000000, 0x040000, CRC(c1393bea) SHA1(a5f877ba38305a7b49fa3c96b9344cbf71e8c9ef) )
	ROM_LOAD16_BYTE( "spl-c22.bin", 0x000001, 0x040000, CRC(0d6fa33e) SHA1(37e9258ef7e108d034c80abc8e5e5ab6dacf0a61) )

	ROM_REGION( 0x400000, "gfx1", ROMREGION_ERASE00 )	/* Graphics */
	/* 0x000000-0x3fffff filled in later in the DRIVER_INIT */

	ROM_REGION( 0x400000, "gfx2", 0 )	/* Graphics */
	ROM_LOAD( "h13.bin", 0x000000, 0x200000, CRC(13ab7f31) SHA1(468424f74d6cccd1b445a9f20e2d24bc46d61ed6) )
	ROM_LOAD( "h11.bin", 0x200000, 0x200000, CRC(c6ac41c8) SHA1(22408ef1e35c66d0fba0c72972c46fad891d1193) )

	ROM_REGION( 0x100000, "gfx3", 0 )	/* 16 bitmaps (320x200, indexed colors) */
	ROM_LOAD( "h9.bin", 0x000000, 0x100000, CRC(b9492557) SHA1(3f5c0d696d65e1cd492763dfa749c813dd56a9bf) )

	ROM_REGION( 0x140000, "oki", 0 )	/* ADPCM samples - sound chip is OKIM6295 */
	ROM_LOAD( "c1.bin", 0x000000, 0x100000, CRC(d9f075a2) SHA1(31a7a677861f39d512e9d1f51925c689e481159a) )
	/* 0x00000-0x2ffff is fixed, 0x30000-0x3ffff is bank switched from all the ROMs */
	ROM_RELOAD(         0x040000, 0x100000 )
ROM_END

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

    Split even/odd bytes from ROMs in 16 bit mode to different memory areas

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

static void glass_ROM16_split_gfx( running_machine &machine, const char *src_reg, const char *dst_reg, int start, int length, int dest1, int dest2 )
{
	int i;

	/* get a pointer to the source data */
	UINT8 *src = (UINT8 *)machine.root_device().memregion(src_reg)->base();

	/* get a pointer to the destination data */
	UINT8 *dst = (UINT8 *)machine.root_device().memregion(dst_reg)->base();

	/* fill destination areas with the proper data */
	for (i = 0; i < length / 2; i++)
	{
		dst[dest1 + i] = src[start + i * 2 + 0];
		dst[dest2 + i] = src[start + i * 2 + 1];
	}
}

/* How does the protection work?

  We know in World Rally it shares the whole of main RAM with the Dallas, with subtle reads and writes / values being checked.. so I guess this will be similar at least
  and thus very hard to figure out if done properly

 */

READ16_MEMBER( glass_state::glass_mainram_r )
{
	UINT16 ret = m_mainram[offset];
	int pc = space.device().safe_pc();

	if (offset == (0xfede96 - 0xfec000)>>1)
	{
		// this address seems important, the game will abort with 'power failure' depending on some reads, presumably refering to the power to the battery

		// there are also various code segments like the one below
		/*
        start:
        tst.b   this address
        bne     end
        tst.b   $fede1d.l
        nop << why?
        bne     start
        end:
        */
		return 0x0000;
		//printf("%06x read %06x - %04x %04x\n", pc , (offset*2 + 0xfec000), ret, mem_mask);
	}
	else if (offset == (0xfede1c - 0xfec000)>>1)
	{
		// related to above, could also be some command ack?
		logerror("%06x read %06x - %04x %04x\n",  pc, (offset*2 + 0xfec000), ret, mem_mask);
	}
	else if (offset == (0xfede26 - 0xfec000)>>1)
	{
		logerror("%06x read %06x - %04x %04x\n",  pc, (offset*2 + 0xfec000), ret, mem_mask);
	}
	return ret;
}

WRITE16_MEMBER( glass_state::glass_mainram_w )
{
	int pc = space.device().safe_pc();

	COMBINE_DATA(&m_mainram[offset]);

	if (offset == (0xfede02 - 0xfec000)>>1)
	{
//      printf("%06x write %06x - %04x %04x\n",  pc, (offset*2 + 0xfec000), data, mem_mask);
		// several checks write here then expect it to appear mirrored, might be some kind of command + command ack
		if (mem_mask & 0xff00) // sometimes mask 0xff00, but not in cases which poll for change
		{
			mem_mask = 0x00ff;
			data >>=8;
			COMBINE_DATA(&m_mainram[offset]);
		}
		return;
	}
	else if (offset == (0xfede1c - 0xfec000)>>1)
	{
		// see notes about 0xfede96 in read, this address seems important
		logerror("%06x write %06x - %04x %04x\n",  pc, (offset*2 + 0xfec000), data, mem_mask);
		if (mem_mask == 0x00ff)
		{
			int realdata = data;

			// don't store the bits written, game checks they get cleared?
			data &= 0xff00;
			COMBINE_DATA(&m_mainram[offset]);

			// a command?
			if (realdata == 0x0002)
			{
				// there is a check on address 0xfede26 just after writing 0002 here..
				offset = (0xfede26 - 0xfec000) >> 1;
				data = 0xff00;
				mem_mask = 0xff00;
				COMBINE_DATA(&m_mainram[offset]);
			}
		}
		return;
	}

}


DRIVER_INIT_MEMBER(glass_state,glass)
{
	/*
    For "gfx2" we have this memory map:
        0x000000-0x1fffff ROM H13
        0x200000-0x3fffff ROM H11

    and we are going to construct this one for "gfx1":
        0x000000-0x0fffff ROM H13 even bytes
        0x100000-0x1fffff ROM H13 odd bytes
        0x200000-0x2fffff ROM H11 even bytes
        0x300000-0x3fffff ROM H11 odd bytes
    */

	/* split ROM H13 */
	glass_ROM16_split_gfx(machine(), "gfx2", "gfx1", 0x0000000, 0x0200000, 0x0000000, 0x0100000);

	/* split ROM H11 */
	glass_ROM16_split_gfx(machine(), "gfx2", "gfx1", 0x0200000, 0x0200000, 0x0200000, 0x0300000);

	/* install custom handler over RAM for protection */
	machine().device("maincpu")->memory().space(AS_PROGRAM)->install_readwrite_handler(0xfec000, 0xfeffff, read16_delegate(FUNC(glass_state::glass_mainram_r), this), write16_delegate(FUNC(glass_state::glass_mainram_w),this));

}

GAME( 1993, glass,    0,     glass, glass, glass_state, glass, ROT0, "OMK / Gaelco", "Glass (Ver 1.1)",                GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING | GAME_SUPPORTS_SAVE )
GAME( 1993, glass10,  glass, glass, glass, glass_state, glass, ROT0, "OMK / Gaelco", "Glass (Ver 1.0)",                GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING | GAME_SUPPORTS_SAVE )
GAME( 1993, glassbrk, glass, glass, glass, glass_state, glass, ROT0, "OMK / Gaelco", "Glass (Ver 1.0, Break Edition)", GAME_UNEMULATED_PROTECTION | GAME_NOT_WORKING | GAME_SUPPORTS_SAVE )