1 /*
2 ***********************************************************************************
3 Dark Mist (c)1986 Taito / Seibu
4 driver by
5 David Haywood
6 Nicola Salmoria
7 Tomasz Slanina
8 Main CPU : z80 (with encryption, external to z80)
9 Sound CPU: custom T5182 cpu (like seibu sound system but with internal code)
10 $e000 - coins (two bytes)
11 $e2b7 - player 1 energy
12 TODO:
13 - sprite/bg and sprite/sprite priorities (name entry screen, player on raft)
14 - cocktail mode
15 - unknown bit in sprite attr (there's code used for OR-ing sprite attrib with some
16 value (taken from ram) when one of coords is greater than 256-16 )
17 ***********************************************************************************
18 */
19
20 #include "driver.h"
21 #include "sndhrdw/t5182.h"
22 #include "vidhrdw/generic.h"
23 #include "decocrpt.h"
24
25 #define XTAL1 14318180
26 #define XTAL2 18432000
27 #define XTAL3 12000000
28
29 #define CPU_CLOCK (XTAL3/2)
30 #define T5182_CLOCK (XTAL1/4)
31 #define YM_CLOCK (XTAL1/4)
32
33 READ_HANDLER(darkmist_palette_r);
34 WRITE_HANDLER(darkmist_palette_w);
35 WRITE_HANDLER(darkmist_spritebank_w);
36 VIDEO_START(darkmist);
37 VIDEO_UPDATE(darkmist);
38 PALETTE_INIT(darkmist);
39
40 unsigned char * darkmist_scroll;
41 unsigned char * darkmist_workram;
42
43 int darkmist_hw;
44 static int coin_stat=0;
45
WRITE_HANDLER(darkmist_hw_w)46 static WRITE_HANDLER(darkmist_hw_w)
47 {
48 darkmist_hw=data;
49 cpu_setbank(1,&memory_region(REGION_CPU1)[0x010000+((data&0x80)?0x4000:0)]);
50 }
51
52
darkmist_coin_hack(void)53 static void darkmist_coin_hack(void)
54 {
55
56 if(input_port_6_r(0)&1)
57 {
58 if(coin_stat==0)
59 {
60 coin_stat=1;
61 if(darkmist_workram[0]<9)
62 {
63 darkmist_workram[0]++;
64 }
65 else
66 {
67 if(darkmist_workram[1]<9)
68 {
69 darkmist_workram[0]=0;
70 darkmist_workram[1]++;
71 }
72 }
73 }
74 }
75 else
76 {
77 coin_stat=0;
78 }
79 }
80
81
82
MEMORY_READ_START(readmem)83 static MEMORY_READ_START( readmem )
84 { 0x0000, 0x7fff, MRA_ROM },
85 { 0x8000, 0xbfff, MRA_BANK1 },
86 { 0xc801, 0xc801, input_port_0_r },
87 { 0xc802, 0xc802, input_port_1_r },
88 { 0xc803, 0xc803, input_port_2_r },
89 { 0xc806, 0xc806, input_port_3_r },
90 { 0xc807, 0xc807, input_port_4_r },
91 { 0xc808, 0xc808, input_port_5_r },
92 { 0xd000, 0xd3ff, darkmist_palette_r },
93 { 0xd400, 0xd41f, MRA_RAM },
94 { 0xd600, 0xd67f, t5182shared_r },
95 { 0xd681, 0xd681, t5182_sharedram_semaphore_snd_r },
96 { 0xd800, 0xdfff, MRA_RAM },
97 { 0xe000, 0xefff, MRA_RAM },
98 { 0xf000, 0xffff, MRA_RAM },
99 MEMORY_END
100
101 static MEMORY_WRITE_START( writemem )
102 { 0x0000, 0x7fff, MWA_ROM },
103 { 0xc804, 0xc804, darkmist_hw_w },
104 { 0xc805, 0xc805, darkmist_spritebank_w },
105 { 0xd000, 0xd3ff, darkmist_palette_w, &paletteram },
106 { 0xd400, 0xd41f, MWA_RAM, &darkmist_scroll },
107 { 0xd600, 0xd67f, t5182shared_w },
108 { 0xd680, 0xd680, t5182_sound_irq_w },
109 { 0xd682, 0xd682, t5182_sharedram_semaphore_main_acquire_w },
110 { 0xd683, 0xd683, t5182_sharedram_semaphore_main_release_w },
111 { 0xd800, 0xdfff, MWA_RAM, &videoram },
112 { 0xe000, 0xefff, MWA_RAM, &darkmist_workram },
113 { 0xf000, 0xffff, MWA_RAM, &spriteram, &spriteram_size },
114 MEMORY_END
115
116
117 INPUT_PORTS_START( darkmist )
118 PORT_START
119 PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY )
120 PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY )
121 PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY )
122 PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY )
123 PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1 )
124 PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2 )
125 PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNKNOWN )
126
127 PORT_START
128 PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP | IPF_8WAY| IPF_COCKTAIL )
129 PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN | IPF_8WAY| IPF_COCKTAIL )
130 PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT | IPF_8WAY| IPF_COCKTAIL )
131 PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT | IPF_8WAY| IPF_COCKTAIL )
132 PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON1| IPF_COCKTAIL )
133 PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON2| IPF_COCKTAIL )
134 PORT_BIT( 0xc0, IP_ACTIVE_LOW, IPT_UNKNOWN )
135
136 PORT_START
137 PORT_DIPNAME( 0x01, 0x01, "2-0" )
138 PORT_DIPSETTING( 0x01, DEF_STR( No ) )
139 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
140 PORT_DIPNAME( 0x02, 0x02, "2-1" )
141 PORT_DIPSETTING( 0x02, DEF_STR( No ) )
142 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
143 PORT_DIPNAME( 0x04, 0x04, "2-2" )
144 PORT_DIPSETTING( 0x04, DEF_STR( No ) )
145 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
146 PORT_BIT_IMPULSE( 0x08, IP_ACTIVE_LOW, IPT_START1, 1 )
147 PORT_BIT_IMPULSE( 0x10, IP_ACTIVE_LOW, IPT_START2, 1 )
148 PORT_DIPNAME( 0x20, 0x20, "2-5" )
149 PORT_DIPSETTING( 0x20, DEF_STR( No ) )
150 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
151 PORT_DIPNAME( 0x40, 0x40, "2-6" )
152 PORT_DIPSETTING( 0x40, DEF_STR( No ) )
153 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
154 PORT_DIPNAME( 0x80, 0x80, "2-7" )
155 PORT_DIPSETTING( 0x80, DEF_STR( No ) )
156 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
157
158 PORT_START
159 PORT_DIPNAME( 0x07, 0x07, DEF_STR( Coin_A ) )
160 PORT_DIPSETTING( 0x00, DEF_STR( 5C_1C ) )
161 PORT_DIPSETTING( 0x04, DEF_STR( 4C_1C ) )
162 PORT_DIPSETTING( 0x02, DEF_STR( 3C_1C ) )
163 PORT_DIPSETTING( 0x06, DEF_STR( 2C_1C ) )
164 PORT_DIPSETTING( 0x07, DEF_STR( 1C_1C ) )
165 PORT_DIPSETTING( 0x03, DEF_STR( 1C_2C ) )
166 PORT_DIPSETTING( 0x05, DEF_STR( 1C_3C ) )
167 PORT_DIPSETTING( 0x01, DEF_STR( 1C_5C ) )
168 PORT_DIPNAME( 0x18, 0x18, DEF_STR( Coin_B ) )
169 PORT_DIPSETTING( 0x10, DEF_STR( 2C_1C ) )
170 PORT_DIPSETTING( 0x18, DEF_STR( 1C_1C ) )
171 PORT_DIPSETTING( 0x00, DEF_STR( 2C_3C ) )
172 PORT_DIPSETTING( 0x08, DEF_STR( 1C_2C ) )
173 PORT_SERVICE( 0x20, IP_ACTIVE_LOW)
174 PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) ) /* Listed as "ALWAYS ON" */
175 PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
176 PORT_DIPSETTING( 0x00, DEF_STR( On ) )
177 PORT_DIPNAME( 0x80, 0x80, DEF_STR( Free_Play ) )
178 PORT_DIPSETTING( 0x80, DEF_STR( No ) )
179 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
180
181 PORT_START
182 PORT_DIPNAME( 0x01, 0x01, DEF_STR( Cabinet ) )
183 PORT_DIPSETTING( 0x01, DEF_STR( Upright ) )
184 PORT_DIPSETTING( 0x00, DEF_STR( Cocktail ) )
185 PORT_DIPNAME( 0x06, 0x06, DEF_STR( Difficulty ) )
186 PORT_DIPSETTING( 0x06, "Easy" )
187 PORT_DIPSETTING( 0x04, "Normal" )
188 PORT_DIPSETTING( 0x02, "Hard" )
189 PORT_DIPSETTING( 0x00, "Hardest" )
190 PORT_DIPNAME( 0x18, 0x08, DEF_STR( Lives ) )
191 PORT_DIPSETTING( 0x18, "1" )
192 PORT_DIPSETTING( 0x10, "2" )
193 PORT_DIPSETTING( 0x08, "3" )
194 PORT_DIPSETTING( 0x00, "4" )
195 PORT_DIPNAME( 0x60, 0x60, DEF_STR( Bonus_Life ) )
196 PORT_DIPSETTING( 0x20, "10K / 20K" )
197 PORT_DIPSETTING( 0x60, "20K / 40K" )
198 PORT_DIPSETTING( 0x40, "30K / 60K" )
199 PORT_DIPSETTING( 0x00, "40K / 80K" )
200 PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) )
201 PORT_DIPSETTING( 0x80, DEF_STR( Off ) )
202 PORT_DIPSETTING( 0x00, DEF_STR( On ) )
203
204
205 PORT_START
206 PORT_DIPNAME( 0x01, 0x01, "5-0" )
207 PORT_DIPSETTING( 0x01, DEF_STR( No ) )
208 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
209 PORT_DIPNAME( 0x02, 0x02, "5-1" )
210 PORT_DIPSETTING( 0x02, DEF_STR( No ) )
211 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
212 PORT_DIPNAME( 0x04, 0x04, "5-2" )
213 PORT_DIPSETTING( 0x04, DEF_STR( No ) )
214 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
215 PORT_DIPNAME( 0x08, 0x08, "5-3" )
216 PORT_DIPSETTING( 0x08, DEF_STR( No ) )
217 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
218 PORT_DIPNAME( 0x10, 0x10, "5-4" )
219 PORT_DIPSETTING( 0x10, DEF_STR( No ) )
220 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
221 PORT_DIPNAME( 0x20, 0x20, "5-5" )
222 PORT_DIPSETTING( 0x20, DEF_STR( No ) )
223 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
224 PORT_DIPNAME( 0x40, 0x40, "5-6" )
225 PORT_DIPSETTING( 0x40, DEF_STR( No ) )
226 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
227 PORT_DIPNAME( 0x80, 0x80, "5-7" )
228 PORT_DIPSETTING( 0x80, DEF_STR( No ) )
229 PORT_DIPSETTING( 0x00, DEF_STR( Yes ) )
230
231 PORT_START /* fake port */
232 PORT_BIT_IMPULSE( 0x01, IP_ACTIVE_HIGH, IPT_COIN1, 1 )
233
234 INPUT_PORTS_END
235
236
237 static struct GfxLayout charlayout =
238 {
239 8,8,
240 RGN_FRAC(1,2),
241 4,
242 { 0, 4, RGN_FRAC(1,2)+0, RGN_FRAC(1,2)+4 },
243
244 { 0, 1, 2, 3, 8+0, 8+1, 8+2, 8+3 },
245 { 0*16, 1*16, 2*16, 3*16, 4*16, 5*16, 6*16, 7*16 },
246 16*8
247 };
248
249 static struct GfxLayout tilelayout =
250 {
251 16,16,
252 RGN_FRAC(1,2),
253 4,
254 { 0, 4, RGN_FRAC(1,2)+0, RGN_FRAC(1,2)+4 },
255
256
257 { 0, 1, 2, 3, 8+0, 8+1, 8+2, 8+3,
258 16+0, 16+1, 16+2, 16+3, 24+0, 24+1, 24+2, 24+3 },
259 { 0*32, 1*32, 2*32, 3*32, 4*32, 5*32, 6*32, 7*32,
260 8*32, 9*32, 10*32, 11*32, 12*32, 13*32, 14*32, 15*32 },
261 32*16
262 };
263
264
265 static struct GfxDecodeInfo gfxdecodeinfo[] =
266 {
267 { REGION_GFX1, 0, &charlayout, 0, 16*4 },
268 { REGION_GFX2, 0, &tilelayout, 0, 16*4 },
269 { REGION_GFX3, 0, &tilelayout, 0, 16*4 },
270 { -1 }
271 };
272
INTERRUPT_GEN(darkmist_interrupt)273 INTERRUPT_GEN( darkmist_interrupt )
274 {
275 if(cpu_getiloops())
276 {
277 cpu_set_irq_line_and_vector(0, 0, HOLD_LINE, 0x08);
278 }
279 else
280 {
281 cpu_set_irq_line_and_vector(0, 0, HOLD_LINE, 0x10);
282 }
283
284 darkmist_coin_hack();
285 }
286
287 static MACHINE_DRIVER_START( darkmist )
288 /* basic machine hardware */
289 MDRV_CPU_ADD(Z80,4000000) /* ? MHz */
MDRV_CPU_MEMORY(readmem,writemem)290 MDRV_CPU_MEMORY(readmem, writemem)
291 MDRV_CPU_VBLANK_INT(darkmist_interrupt,2)
292
293 MDRV_FRAMES_PER_SECOND(60)
294 MDRV_VBLANK_DURATION(DEFAULT_60HZ_VBLANK_DURATION)
295
296 /* video hardware */
297 MDRV_VIDEO_ATTRIBUTES(VIDEO_TYPE_RASTER )
298 MDRV_SCREEN_SIZE(256, 256)
299 MDRV_VISIBLE_AREA(0, 256-1, 16, 256-16-1)
300 MDRV_GFXDECODE(gfxdecodeinfo)
301 MDRV_PALETTE_LENGTH(0x100+1)
302 MDRV_PALETTE_INIT(darkmist)
303 MDRV_COLORTABLE_LENGTH(0x100*4)
304 MDRV_VIDEO_START(darkmist)
305 MDRV_VIDEO_UPDATE(darkmist)
306
307 MDRV_IMPORT_FROM(t5182_audio)
308 MACHINE_DRIVER_END
309
310 ROM_START( darkmist )
311 ROM_REGION( 0x18000, REGION_CPU1, 0 )
312 ROM_LOAD( "dm_15.rom", 0x00000, 0x08000, CRC(21e6503c) SHA1(09174fb424b76f7f2a381297e3420ddd2e76b008) )
313
314 ROM_LOAD( "dm_16.rom", 0x10000, 0x08000, CRC(094579d9) SHA1(2449bc9ba38396912ee9b72dd870ea9fcff95776) )
315
316 ROM_REGION( 0x10000, REGION_CPU2, 0 ) /* Toshiba T5182 module */
317 ROM_LOAD( "t5182.rom", 0x0000, 0x2000, CRC(d354c8fc) SHA1(a1c9e1ac293f107f69cc5788cf6abc3db1646e33) )
318 ROM_LOAD( "dm_17.rom", 0x8000, 0x8000, CRC(7723dcae) SHA1(a0c69e7a7b6fd74f7ed6b9c6419aed94aabcd4b0) )
319
320 ROM_REGION( 0x4000, REGION_GFX1, 0 )
321 ROM_LOAD( "dm_13.rom", 0x00000, 0x02000, CRC(38bb38d9) SHA1(d751990166dd3d503c5de7667679b96210061cd1) )
322 ROM_LOAD( "dm_14.rom", 0x02000, 0x02000, CRC(ac5a31f3) SHA1(79083390671062be2eab93cc875a0f86d709a963) )
323
324 ROM_REGION( 0x40000, REGION_GFX2, 0 )
325 ROM_LOAD( "dm_05.rom", 0x10000, 0x10000, CRC(ca79a738) SHA1(66a76ea0d8ecc44f6cc77102303df74f40bf6118) )
326 ROM_LOAD( "dm_01.rom", 0x00000, 0x10000, CRC(652aee6b) SHA1(f4150784f7bd7be83a0041e4c52540aa564062ba) )
327 ROM_LOAD( "dm_06.rom", 0x30000, 0x10000, CRC(9629ed2c) SHA1(453f6a0b12efdadd7fcbe03ad37afb0afa6be051) )
328 ROM_LOAD( "dm_02.rom", 0x20000, 0x10000, CRC(e2dd15aa) SHA1(1f3a6a1e1afabfe9dc47549ef13ae7696302ae88) )
329
330 ROM_REGION( 0x40000, REGION_GFX3, 0)
331 ROM_LOAD( "dm_09.rom", 0x00000, 0x10000, CRC(52154b50) SHA1(5ee1a4bcf0752a057b9993b0069d744c35cf55f4) )
332 ROM_LOAD( "dm_11.rom", 0x10000, 0x08000, CRC(3118e2f9) SHA1(dfd946ea1310851f97d31ce58d8280f2d92b0f59) )
333 ROM_LOAD( "dm_10.rom", 0x20000, 0x10000, CRC(34fd52b5) SHA1(c4ee464ed79ec91f993b0f894572c0288f0ad1d4) )
334 ROM_LOAD( "dm_12.rom", 0x30000, 0x08000, CRC(cc4b9839) SHA1(b7e95513d2e06929fed5005caf3bf8c3fba0b597) )
335
336 ROM_REGION( 0x8000, REGION_USER1, 0 )
337 /* BG layer map ( 512x64 )*/
338 ROM_LOAD( "dm_03.rom", 0x00000, 0x08000, CRC(60b40c2a) SHA1(c046273b15dab95ea4851c26ce941e580fa1b6ec) )
339
340 ROM_REGION( 0x8000, REGION_USER2, 0 )
341 /* BG layer attr ( 512x64 ) */
342 ROM_LOAD( "dm_04.rom", 0x00000, 0x08000, CRC(d47b8cd9) SHA1(86eb7a5d8ea63c0c91f455b1b8322cc7b9c4a968) )
343
344 ROM_REGION( 0x04000, REGION_USER3, 0 )
345 /* FG layer map ( 64x256 ) */
346 ROM_LOAD( "dm_07.rom", 0x00000, 0x04000, CRC(889b1277) SHA1(78405110b9cf1ab988c0cbfdb668498dadb41229) )
347
348 ROM_REGION( 0x04000, REGION_USER4, 0 )
349 /* FG layer attr ( 64x256 ) */
350 ROM_LOAD( "dm_08.rom", 0x00000, 0x04000, CRC(f76f6f46) SHA1(ce1c67dc8976106b24fee8d3a0b9e5deb016a327) )
351
352 ROM_REGION( 0x0600, REGION_PROMS, 0 )
353 /* color lookup tables */
354 ROM_LOAD( "63s281n.m7", 0x0000, 0x0100, CRC(897ef49f) SHA1(e40c0fb0a68aa91ceaee86e774a428819a4794bb) )
355 ROM_LOAD( "63s281n.d7", 0x0100, 0x0100, CRC(a9975a96) SHA1(3a34569fc68ac15f91e1e90d4e273f844b315091) )
356 ROM_LOAD( "63s281n.f11", 0x0200, 0x0100, CRC(8096b206) SHA1(257004aa3501121d058afa6f64b1129303246758) )
357 ROM_LOAD( "63s281n.j15", 0x0300, 0x0100, CRC(2ea780a4) SHA1(0f8d6791114705e9982f9035f291d2a305b47f0a) )
358 /* unknown */
359 ROM_LOAD( "63s281n.l1", 0x0400, 0x0100, CRC(208d17ca) SHA1(a77d56337bcac8d9a7bc3411239dfb3045e069ec) )
360 ROM_LOAD( "82s129.d11", 0x0500, 0x0100, CRC(866eab0e) SHA1(398ffe2b82b6e2235746fd987d5f5995d7dc8687) )
361 ROM_END
362
363
364 static void decrypt_gfx(void)
365 {
366 UINT8 *buf = malloc(0x40000);
367 UINT8 *rom;
368 int size;
369 int i;
370
371 rom = memory_region(REGION_GFX1);
372 size = memory_region_length(REGION_GFX1);
373
374 /* data lines */
375 for (i = 0;i < size/2;i++)
376 {
377 int w1;
378
379 w1 = (rom[i + 0*size/2] << 8) + rom[i + 1*size/2];
380
381 w1 = BITSWAP16(w1, 9,14,7,2, 6,8,3,15, 10,13,5,12, 0,11,4,1);
382
383 buf[i + 0*size/2] = w1 >> 8;
384 buf[i + 1*size/2] = w1 & 0xff;
385 }
386
387 /* address lines */
388 for (i = 0;i < size;i++)
389 {
390 rom[i] = buf[BITSWAP24(i,23,22,21,20,19,18,17,16,15,14,13,12, 3,2,1, 11,10,9,8, 0, 7,6,5,4)];
391 }
392
393
394 rom = memory_region(REGION_GFX2);
395 size = memory_region_length(REGION_GFX2);
396
397 /* data lines */
398 for (i = 0;i < size/2;i++)
399 {
400 int w1;
401
402 w1 = (rom[i + 0*size/2] << 8) + rom[i + 1*size/2];
403
404 w1 = BITSWAP16(w1, 9,14,7,2, 6,8,3,15, 10,13,5,12, 0,11,4,1);
405
406 buf[i + 0*size/2] = w1 >> 8;
407 buf[i + 1*size/2] = w1 & 0xff;
408 }
409
410 /* address lines */
411 for (i = 0;i < size;i++)
412 {
413 rom[i] = buf[BITSWAP24(i,23,22,21,20,19,18,17,16,15,14,13, 5,4,3,2, 12,11,10,9,8, 1,0, 7,6)];
414 }
415
416
417 rom = memory_region(REGION_GFX3);
418 size = memory_region_length(REGION_GFX3);
419
420 /* data lines */
421 for (i = 0;i < size/2;i++)
422 {
423 int w1;
424
425 w1 = (rom[i + 0*size/2] << 8) + rom[i + 1*size/2];
426
427 w1 = BITSWAP16(w1, 9,14,7,2, 6,8,3,15, 10,13,5,12, 0,11,4,1);
428
429 buf[i + 0*size/2] = w1 >> 8;
430 buf[i + 1*size/2] = w1 & 0xff;
431 }
432
433 /* address lines */
434 for (i = 0;i < size;i++)
435 {
436 rom[i] = buf[BITSWAP24(i, 23,22,21,20,19,18,17,16,15,14, 12,11,10,9,8, 5,4,3, 13, 7,6, 1,0, 2)];
437 }
438
439 free(buf);
440 }
441
decrypt_snd(void)442 static void decrypt_snd(void)
443 {
444 int i;
445 unsigned char *ROM = memory_region(REGION_CPU2);
446
447 for(i=0x8000;i<0x10000;i++)
448 ROM[i] = BITSWAP8(ROM[i], 7,1,2,3,4,5,6,0);
449 }
450
451
DRIVER_INIT(darkmist)452 static DRIVER_INIT(darkmist)
453 {
454 int i;
455 unsigned char *ROM = memory_region(REGION_CPU1);
456 UINT8 *buffer = malloc(0x10000);
457 UINT8 *decrypt = auto_malloc(0x8000);
458
459 decrypt_gfx();
460
461 decrypt_snd();
462
463 for(i=0;i<0x8000;i++)
464 {
465 UINT8 p, d;
466 p = d = memory_region(REGION_CPU1)[i];
467
468 if(((i & 0x20) == 0x00) && ((i & 0x8) != 0))
469 p ^= 0x20;
470
471 if(((i & 0x20) == 0x00) && ((i & 0xa) != 0))
472 d ^= 0x20;
473
474 if(((i & 0x200) == 0x200) && ((i & 0x408) != 0))
475 p ^= 0x10;
476
477 if((i & 0x220) != 0x200)
478 {
479 p = BITSWAP8(p, 7,6,5,2,3,4,1,0);
480 d = BITSWAP8(d, 7,6,5,2,3,4,1,0);
481 }
482
483 memory_region(REGION_CPU1)[i] = d;
484 decrypt[i] = p;
485 }
486
487
488 memory_set_opcode_base(0,decrypt);
489 cpu_setbank(1,&ROM[0x010000]);
490
491 /* adr line swaps */
492 ROM = memory_region(REGION_USER1);
493 memcpy( buffer, ROM, memory_region_length(REGION_USER1) );
494
495 for(i=0;i<memory_region_length(REGION_USER1);i++)
496 {
497 ROM[i]=buffer[BITSWAP24(i,23,22,21,20,19,18,17,16,15,6,5,4,3,2,14,13,12,11,8,7,1,0,10,9)];
498 }
499
500 ROM = memory_region(REGION_USER2);
501 memcpy( buffer, ROM, memory_region_length(REGION_USER2) );
502 for(i=0;i<memory_region_length(REGION_USER2);i++)
503 {
504 ROM[i]=buffer[BITSWAP24(i,23,22,21,20,19,18,17,16,15,6,5,4,3,2,14,13,12,11,8,7,1,0,10,9)];
505 }
506
507 ROM = memory_region(REGION_USER3);
508 memcpy( buffer, ROM, memory_region_length(REGION_USER3) );
509 for(i=0;i<memory_region_length(REGION_USER3);i++)
510 {
511 ROM[i]=buffer[BITSWAP24(i,23,22,21,20,19,18,17,16,15,14 ,5,4,3,2,11,10,9,8,13,12,1,0,7,6)];
512 }
513
514 ROM = memory_region(REGION_USER4);
515 memcpy( buffer, ROM, memory_region_length(REGION_USER4) );
516 for(i=0;i<memory_region_length(REGION_USER4);i++)
517 {
518 ROM[i]=buffer[BITSWAP24(i,23,22,21,20,19,18,17,16,15,14 ,5,4,3,2,11,10,9,8,13,12,1,0,7,6)];
519 }
520
521 free(buffer);
522 }
523
524 GAME( 1986, darkmist, 0, darkmist, darkmist, darkmist, ROT270, "Seibu Kaihatsu (Taito license)", "The Lost Castle in Darkmist" )
525