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linux compile fixed
[picodrive.git] / Pico / Memory.s
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4ff2d527 1@ vim:filetype=armasm\r
2\r
cc68a136 3@ memory handlers with banking support for SSF II - The New Challengers\r
4@ mostly based on Gens code\r
5\r
6cadc2da 6@ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
cc68a136 7@ All Rights Reserved\r
8\r
9\r
e5503e2f 10.include "port_config.s"\r
cc68a136 11\r
12.text\r
13\r
14@ default jump tables\r
15\r
16m_read8_def_table:\r
17 .long m_read8_rom0 @ 0x000000 - 0x07FFFF\r
18 .long m_read8_rom1 @ 0x080000 - 0x0FFFFF\r
19 .long m_read8_rom2 @ 0x100000 - 0x17FFFF\r
20 .long m_read8_rom3 @ 0x180000 - 0x1FFFFF\r
21 .long m_read8_rom4 @ 0x200000 - 0x27FFFF\r
22 .long m_read8_rom5 @ 0x280000 - 0x2FFFFF\r
23 .long m_read8_rom6 @ 0x300000 - 0x37FFFF\r
24 .long m_read8_rom7 @ 0x380000 - 0x3FFFFF\r
29a95187 25 .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks\r
cc68a136 26 .long m_read8_rom9 @ 0x480000 - 0x4FFFFF\r
27 .long m_read8_romA @ 0x500000 - 0x57FFFF\r
28 .long m_read8_romB @ 0x580000 - 0x5FFFFF\r
29 .long m_read8_romC @ 0x600000 - 0x67FFFF\r
30 .long m_read8_romD @ 0x680000 - 0x6FFFFF\r
31 .long m_read8_romE @ 0x700000 - 0x77FFFF\r
32 .long m_read8_romF @ 0x780000 - 0x7FFFFF\r
29a95187 33 .long m_read8_rom10 @ 0x800000 - 0x87FFFF\r
34 .long m_read8_rom11 @ 0x880000 - 0x8FFFFF\r
35 .long m_read8_rom12 @ 0x900000 - 0x97FFFF\r
36 .long m_read8_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 37 .long m_read8_misc @ 0xA00000 - 0xA7FFFF\r
38 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
39 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
40 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
41 .long m_read8_vdp @ 0xC00000 - 0xC7FFFF\r
42 .long m_read8_vdp @ 0xC80000 - 0xCFFFFF\r
43 .long m_read_null @ 0xD00000 - 0xD7FFFF\r
44 .long m_read_null @ 0xD80000 - 0xDFFFFF\r
45 .long m_read8_ram @ 0xE00000 - 0xE7FFFF\r
46 .long m_read8_ram @ 0xE80000 - 0xEFFFFF\r
47 .long m_read8_ram @ 0xF00000 - 0xF7FFFF\r
48 .long m_read8_ram @ 0xF80000 - 0xFFFFFF\r
49\r
50m_read16_def_table:\r
51 .long m_read16_rom0 @ 0x000000 - 0x07FFFF\r
52 .long m_read16_rom1 @ 0x080000 - 0x0FFFFF\r
53 .long m_read16_rom2 @ 0x100000 - 0x17FFFF\r
54 .long m_read16_rom3 @ 0x180000 - 0x1FFFFF\r
55 .long m_read16_rom4 @ 0x200000 - 0x27FFFF\r
56 .long m_read16_rom5 @ 0x280000 - 0x2FFFFF\r
57 .long m_read16_rom6 @ 0x300000 - 0x37FFFF\r
58 .long m_read16_rom7 @ 0x380000 - 0x3FFFFF\r
59 .long m_read16_rom8 @ 0x400000 - 0x47FFFF\r
60 .long m_read16_rom9 @ 0x480000 - 0x4FFFFF\r
61 .long m_read16_romA @ 0x500000 - 0x57FFFF\r
62 .long m_read16_romB @ 0x580000 - 0x5FFFFF\r
63 .long m_read16_romC @ 0x600000 - 0x67FFFF\r
64 .long m_read16_romD @ 0x680000 - 0x6FFFFF\r
65 .long m_read16_romE @ 0x700000 - 0x77FFFF\r
66 .long m_read16_romF @ 0x780000 - 0x7FFFFF\r
29a95187 67 .long m_read16_rom10 @ 0x800000 - 0x87FFFF\r
68 .long m_read16_rom11 @ 0x880000 - 0x8FFFFF\r
69 .long m_read16_rom12 @ 0x900000 - 0x97FFFF\r
70 .long m_read16_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 71 .long m_read16_misc @ 0xA00000 - 0xA7FFFF\r
72 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
73 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
74 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
75 .long m_read16_vdp @ 0xC00000 - 0xC7FFFF\r
76 .long m_read_null @ 0xC80000 - 0xCFFFFF\r
77 .long m_read_null @ 0xD00000 - 0xD7FFFF\r
78 .long m_read_null @ 0xD80000 - 0xDFFFFF\r
79 .long m_read16_ram @ 0xE00000 - 0xE7FFFF\r
80 .long m_read16_ram @ 0xE80000 - 0xEFFFFF\r
81 .long m_read16_ram @ 0xF00000 - 0xF7FFFF\r
82 .long m_read16_ram @ 0xF80000 - 0xFFFFFF\r
83\r
84m_read32_def_table:\r
85 .long m_read32_rom0 @ 0x000000 - 0x07FFFF\r
86 .long m_read32_rom1 @ 0x080000 - 0x0FFFFF\r
87 .long m_read32_rom2 @ 0x100000 - 0x17FFFF\r
88 .long m_read32_rom3 @ 0x180000 - 0x1FFFFF\r
89 .long m_read32_rom4 @ 0x200000 - 0x27FFFF\r
90 .long m_read32_rom5 @ 0x280000 - 0x2FFFFF\r
91 .long m_read32_rom6 @ 0x300000 - 0x37FFFF\r
92 .long m_read32_rom7 @ 0x380000 - 0x3FFFFF\r
93 .long m_read32_rom8 @ 0x400000 - 0x47FFFF\r
94 .long m_read32_rom9 @ 0x480000 - 0x4FFFFF\r
95 .long m_read32_romA @ 0x500000 - 0x57FFFF\r
96 .long m_read32_romB @ 0x580000 - 0x5FFFFF\r
97 .long m_read32_romC @ 0x600000 - 0x67FFFF\r
98 .long m_read32_romD @ 0x680000 - 0x6FFFFF\r
99 .long m_read32_romE @ 0x700000 - 0x77FFFF\r
100 .long m_read32_romF @ 0x780000 - 0x7FFFFF\r
29a95187 101 .long m_read32_rom10 @ 0x800000 - 0x87FFFF\r
102 .long m_read32_rom11 @ 0x880000 - 0x8FFFFF\r
103 .long m_read32_rom12 @ 0x900000 - 0x97FFFF\r
104 .long m_read32_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 105 .long m_read32_misc @ 0xA00000 - 0xA7FFFF\r
106 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
107 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
108 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
109 .long m_read32_vdp @ 0xC00000 - 0xC7FFFF\r
110 .long m_read_null @ 0xC80000 - 0xCFFFFF\r
111 .long m_read_null @ 0xD00000 - 0xD7FFFF\r
112 .long m_read_null @ 0xD80000 - 0xDFFFFF\r
113 .long m_read32_ram @ 0xE00000 - 0xE7FFFF\r
114 .long m_read32_ram @ 0xE80000 - 0xEFFFFF\r
115 .long m_read32_ram @ 0xF00000 - 0xF7FFFF\r
116 .long m_read32_ram @ 0xF80000 - 0xFFFFFF\r
117\r
118\r
119@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
120\r
121.bss\r
122@.section .bss, "brw"\r
123@.data\r
124\r
125@ used tables\r
126m_read8_table:\r
127 .skip 32*4\r
128\r
129m_read16_table:\r
130 .skip 32*4\r
131\r
132m_read32_table:\r
133 .skip 32*4\r
134\r
135\r
136@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
137\r
138.text\r
139\r
140.global PicoMemReset\r
141.global PicoRead8\r
142.global PicoRead16\r
143.global PicoRead32\r
e5503e2f 144.global PicoWrite8\r
cc68a136 145.global PicoWriteRomHW_SSF2\r
e5503e2f 146.global m_m68k_read8_misc\r
147.global m_m68k_write8_misc\r
cc68a136 148\r
149\r
150PicoMemReset:\r
151 ldr r12,=(Pico+0x22204)\r
152 ldr r12,[r12] @ romsize\r
153 add r12,r12,#0x80000\r
154 sub r12,r12,#1\r
155 mov r12,r12,lsr #19\r
156\r
157 ldr r0, =m_read8_table\r
158 ldr r1, =m_read8_def_table\r
159 mov r2, #32\r
1601:\r
161 ldr r3, [r1], #4\r
162 str r3, [r0], #4\r
163 subs r2, r2, #1\r
164 bne 1b\r
165\r
166 ldr r0, =m_read16_table\r
167 ldr r1, =m_read16_def_table\r
168 mov r2, #32\r
1691:\r
170 subs r2, r2, #1\r
171 ldr r3, [r1], #4\r
172 str r3, [r0], #4\r
173 bne 1b\r
174\r
175 ldr r0, =m_read32_table\r
176 ldr r1, =m_read32_def_table\r
177 mov r2, #32\r
1781:\r
179 subs r2, r2, #1\r
180 ldr r3, [r1], #4\r
181 str r3, [r0], #4\r
182 bne 1b\r
183\r
184 @ update memhandlers according to ROM size\r
185 ldr r1, =m_read8_above_rom\r
186 ldr r0, =m_read8_table\r
187 mov r2, #16\r
1881:\r
189 sub r2, r2, #1\r
190 cmp r2, r12\r
191 blt 2f\r
192 cmp r2, #4\r
193 beq 1b @ do not touch the SRAM area\r
194 str r1, [r0, r2, lsl #2]\r
195 b 1b\r
1962:\r
197 ldr r1, =m_read16_above_rom\r
198 ldr r0, =m_read16_table\r
199 mov r2, #16\r
2001:\r
201 sub r2, r2, #1\r
202 cmp r2, r12\r
203 blt 2f\r
204 cmp r2, #4\r
205 beq 1b\r
206 str r1, [r0, r2, lsl #2]\r
207 b 1b\r
2082:\r
209 ldr r1, =m_read32_above_rom\r
210 ldr r0, =m_read32_table\r
211 mov r2, #16\r
2121:\r
213 sub r2, r2, #1\r
214 cmp r2, r12\r
215 blt 2f\r
216 cmp r2, #4\r
217 beq 1b\r
218 str r1, [r0, r2, lsl #2]\r
219 b 1b\r
2202:\r
221 bx lr\r
222\r
223.pool\r
224\r
225@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
226\r
227PicoRead8: @ u32 a\r
228 ldr r2, =m_read8_table\r
229 bic r0, r0, #0xff000000\r
230 and r1, r0, #0x00f80000\r
231 ldr pc, [r2, r1, lsr #17]\r
232\r
233PicoRead16: @ u32 a\r
234 ldr r2, =m_read16_table\r
235 bic r0, r0, #0xff000000\r
236 and r1, r0, #0x00f80000\r
237 ldr pc, [r2, r1, lsr #17]\r
238\r
239PicoRead32: @ u32 a\r
240 ldr r2, =m_read32_table\r
241 bic r0, r0, #0xff000000\r
242 and r1, r0, #0x00f80000\r
243 ldr pc, [r2, r1, lsr #17]\r
244\r
245.pool\r
246\r
247@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
248\r
249m_read_null:\r
250 mov r0, #0\r
251 bx lr\r
252\r
253\r
254.macro m_read8_rom sect\r
255 ldr r1, =(Pico+0x22200)\r
256 bic r0, r0, #0xf80000\r
257 ldr r1, [r1]\r
258.if \sect\r
259 orr r0, r0, #0x080000*\sect\r
260.endif\r
261 eor r0, r0, #1\r
262 ldrb r0, [r1, r0]\r
263 bx lr\r
264.endm\r
265\r
266\r
267m_read8_rom0: @ 0x000000 - 0x07ffff\r
268 m_read8_rom 0\r
269\r
270m_read8_rom1: @ 0x080000 - 0x0fffff\r
271 m_read8_rom 1\r
272\r
273m_read8_rom2: @ 0x100000 - 0x17ffff\r
274 m_read8_rom 2\r
275\r
276m_read8_rom3: @ 0x180000 - 0x1fffff\r
277 m_read8_rom 3\r
278\r
279m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area\r
280 ldr r2, =(SRam)\r
281 ldr r3, =(Pico+0x22200)\r
282 ldr r1, [r2, #8] @ SRam.end\r
283 bic r0, r0, #0xf80000\r
284 orr r0, r0, #0x200000\r
285 cmp r0, r1\r
286 bgt m_read8_nosram\r
287 ldr r1, [r2, #4] @ SRam.start (1ci)\r
288 cmp r0, r1\r
289 blt m_read8_nosram\r
290 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (1ci)\r
291 sub r12,r0, #0x200000\r
292 tst r1, #0x10\r
293 bne m_read8_detected\r
294 cmp r12,#1\r
295 ble m_read8_detected\r
296 tst r1, #1\r
297 orrne r1, r1, #0x10\r
298 strneb r1, [r3, #0x11]\r
299m_read8_detected:\r
300 tst r1, #4 @ EEPROM read?\r
301 ldrne r0, =SRAMReadEEPROM @ (1ci if ne)\r
302 bxne r0\r
303m_read8_noteeprom:\r
304 tst r1, #1\r
305 beq m_read8_nosram\r
306 ldr r3, [r2] @ SRam.data\r
307 ldr r2, [r2, #4] @ SRam.start (1ci)\r
308 sub r3, r3, r2\r
309 ldrb r0, [r3, r0]\r
310 bx lr\r
311m_read8_nosram:\r
312 ldr r1, [r3, #4] @ 1ci\r
313 cmp r0, r1\r
314 movgt r0, #0\r
315 bxgt lr @ bad location\r
316 ldr r1, [r3]\r
317 eor r0, r0, #1\r
318 ldrb r0, [r1, r0]\r
319 bx lr\r
320\r
321m_read8_rom5: @ 0x280000 - 0x2fffff\r
322 m_read8_rom 5\r
323\r
324m_read8_rom6: @ 0x300000 - 0x37ffff\r
325 m_read8_rom 6\r
326\r
327m_read8_rom7: @ 0x380000 - 0x3fffff\r
328 m_read8_rom 7\r
329\r
330m_read8_rom8: @ 0x400000 - 0x47ffff\r
331 m_read8_rom 8\r
332\r
333m_read8_rom9: @ 0x480000 - 0x4fffff\r
334 m_read8_rom 9\r
335\r
cc68a136 336m_read8_romA: @ 0x500000 - 0x57ffff\r
337 m_read8_rom 0xA\r
338\r
339m_read8_romB: @ 0x580000 - 0x5fffff\r
340 m_read8_rom 0xB\r
341\r
342m_read8_romC: @ 0x600000 - 0x67ffff\r
343 m_read8_rom 0xC\r
344\r
345m_read8_romD: @ 0x680000 - 0x6fffff\r
346 m_read8_rom 0xD\r
347\r
348m_read8_romE: @ 0x700000 - 0x77ffff\r
349 m_read8_rom 0xE\r
350\r
351m_read8_romF: @ 0x780000 - 0x7fffff\r
352 m_read8_rom 0xF\r
353\r
29a95187 354m_read8_rom10: @ 0x800000 - 0x87ffff\r
355 m_read8_rom 0x10\r
356\r
357m_read8_rom11: @ 0x880000 - 0x8fffff\r
358 m_read8_rom 0x11\r
359\r
360m_read8_rom12: @ 0x900000 - 0x97ffff\r
361 m_read8_rom 0x12\r
362\r
363m_read8_rom13: @ 0x980000 - 0x9fffff\r
364 m_read8_rom 0x13\r
365\r
e5503e2f 366\r
367m_m68k_read8_misc:\r
cc68a136 368m_read8_misc:\r
e5503e2f 369 bic r2, r0, #0x001f @ most commonly we get i/o port read,\r
370 cmp r2, #0xa10000 @ so check for it first\r
371 bne m_read8_misc2\r
372m_read8_misc_io:\r
373 ands r0, r0, #0x1e\r
374 beq m_read8_misc_hwreg\r
375 cmp r0, #4\r
376 ldrle r2, =PadRead\r
377 movlt r0, #0\r
378 moveq r0, #1\r
379 bxle r2\r
380 ldr r3, =(Pico+0x22000)\r
381 mov r0, r0, lsr #1 @ other IO ports (Pico.ioports[a])\r
382 ldrb r0, [r3, r0]\r
383 bx lr\r
384\r
385m_read8_misc_hwreg:\r
386 ldr r3, =(Pico+0x22200)\r
387 ldrb r0, [r3, #0x0f] @ Pico.m.hardware\r
388 bx lr\r
389\r
390m_read8_misc2:\r
391 mov r2, #0xa10000 @ games also like to poll busreq,\r
392 orr r2, r2, #0x001100 @ so we'll try it now\r
393 cmp r0, r2\r
394 ldreq r2, =z80ReadBusReq\r
395 bxeq r2\r
396\r
397 and r2, r0, #0xff0000 @ finally it might be\r
398 cmp r2, #0xa00000 @ z80 area\r
399 bne m_read8_misc3\r
400 tst r0, #0x4000\r
401 ldreq r2, =z80Read8 @ z80 RAM\r
cc68a136 402 bxeq r2\r
e5503e2f 403 and r2, r0, #0x6000\r
404 cmp r2, #0x4000\r
405 mvnne r0, #0\r
406 bxne lr @ invalid\r
407.if EXTERNAL_YM2612\r
408 ldr r1, =PicoOpt\r
409 ldr r1, [r1]\r
410 tst r1, #1\r
411 beq m_read8_fake_ym2612\r
412 tst r1, #0x200\r
413 ldreq r2, =YM2612Read_\r
414 ldrne r2, =YM2612Read_940\r
415.else\r
416 ldr r2, =YM2612Read_\r
417.endif\r
418 bx r2 @ ym2612\r
419\r
420m_read8_fake_ym2612:\r
421 ldr r3, =(Pico+0x22200)\r
422 ldrb r0, [r3, #8] @ Pico.m.rotate\r
423 add r1, r0, #1\r
424 strb r1, [r3, #8]\r
425 and r0, r0, #3\r
426 bx lr\r
427\r
428m_read8_misc3:\r
429 @ if everything else fails, use generic handler\r
cc68a136 430 stmfd sp!,{r0,lr}\r
431 bic r0, r0, #1\r
432 mov r1, #8\r
433 bl OtherRead16\r
434 ldmfd sp!,{r1,lr}\r
435 tst r1, #1\r
436 moveq r0, r0, lsr #8\r
437 bx lr\r
438\r
e5503e2f 439\r
cc68a136 440m_read8_vdp:\r
441 tst r0, #0x70000\r
442 tsteq r0, #0x000e0\r
443 bxne lr @ invalid read\r
444 stmfd sp!,{r0,lr}\r
445 bic r0, r0, #1\r
446 bl PicoVideoRead\r
447 ldmfd sp!,{r1,lr}\r
448 tst r1, #1\r
449 moveq r0, r0, lsr #8\r
450 bx lr\r
451\r
452m_read8_ram:\r
453 ldr r1, =Pico\r
454 bic r0, r0, #0xff0000\r
455 eor r0, r0, #1\r
456 ldrb r0, [r1, r0]\r
457 bx lr\r
458\r
459m_read8_above_rom:\r
460 stmfd sp!,{r0,lr}\r
461 bic r0, r0, #1\r
462 mov r1, #8\r
66fdc0f0 463 bl OtherRead16End\r
cc68a136 464 ldmfd sp!,{r1,lr}\r
465 tst r1, #1\r
466 moveq r0, r0, lsr #8\r
467 bx lr\r
468\r
469.pool\r
470\r
471@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
472\r
473.macro m_read16_rom sect\r
474 ldr r1, =(Pico+0x22200)\r
475 bic r0, r0, #0xf80000\r
476 ldr r1, [r1]\r
477 bic r0, r0, #1\r
478.if \sect\r
479 orr r0, r0, #0x080000*\sect\r
480.endif\r
481 ldrh r0, [r1, r0]\r
482 bx lr\r
483.endm\r
484\r
485\r
486m_read16_rom0: @ 0x000000 - 0x07ffff\r
487 m_read16_rom 0\r
488\r
489m_read16_rom1: @ 0x080000 - 0x0fffff\r
490 m_read16_rom 1\r
491\r
492m_read16_rom2: @ 0x100000 - 0x17ffff\r
493 m_read16_rom 2\r
494\r
495m_read16_rom3: @ 0x180000 - 0x1fffff\r
496 m_read16_rom 3\r
497\r
498m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r
499 ldr r2, =(SRam)\r
500 ldr r3, =(Pico+0x22200)\r
501 ldr r1, [r2, #8] @ SRam.end\r
502 bic r0, r0, #0xf80000\r
503 bic r0, r0, #1\r
504 orr r0, r0, #0x200000\r
505 cmp r0, r1\r
506 bgt m_read16_nosram\r
507 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r
508 tst r1, #1\r
509 beq m_read16_nosram\r
510 ldr r1, [r2, #4] @ SRam.start (1ci)\r
511 cmp r0, r1\r
512 blt m_read16_nosram\r
513 ldr r2, [r2] @ SRam.data (1ci)\r
514 sub r2, r2, r1\r
515 ldrh r0, [r2, r0] @ 2ci\r
516 and r1, r0, #0xff\r
517 mov r0, r0, lsr #8\r
518 orr r0, r0, r1, lsl #8\r
519 bx lr\r
721cd396 520\r
cc68a136 521m_read16_nosram:\r
522 ldr r1, [r3, #4] @ 1ci\r
523 cmp r0, r1\r
524 movgt r0, #0\r
525 bxgt lr @ bad location\r
526 ldr r1, [r3] @ 1ci\r
527 ldrh r0, [r1, r0]\r
528 bx lr\r
529\r
530m_read16_rom5: @ 0x280000 - 0x2fffff\r
531 m_read16_rom 5\r
532\r
533m_read16_rom6: @ 0x300000 - 0x37ffff\r
534 m_read16_rom 6\r
535\r
536m_read16_rom7: @ 0x380000 - 0x3fffff\r
537 m_read16_rom 7\r
538\r
539m_read16_rom8: @ 0x400000 - 0x47ffff\r
540 m_read16_rom 8\r
541\r
542m_read16_rom9: @ 0x480000 - 0x4fffff\r
543 m_read16_rom 9\r
544\r
cc68a136 545m_read16_romA: @ 0x500000 - 0x57ffff\r
546 m_read16_rom 0xA\r
547\r
548m_read16_romB: @ 0x580000 - 0x5fffff\r
549 m_read16_rom 0xB\r
550\r
551m_read16_romC: @ 0x600000 - 0x67ffff\r
552 m_read16_rom 0xC\r
553\r
554m_read16_romD: @ 0x680000 - 0x6fffff\r
555 m_read16_rom 0xD\r
556\r
557m_read16_romE: @ 0x700000 - 0x77ffff\r
558 m_read16_rom 0xE\r
559\r
560m_read16_romF: @ 0x780000 - 0x7fffff\r
561 m_read16_rom 0xF\r
562\r
29a95187 563m_read16_rom10: @ 0x800000 - 0x87ffff\r
564 m_read16_rom 0x10\r
565\r
566m_read16_rom11: @ 0x880000 - 0x8fffff\r
567 m_read16_rom 0x11\r
568\r
569m_read16_rom12: @ 0x900000 - 0x97ffff\r
570 m_read16_rom 0x12\r
571\r
572m_read16_rom13: @ 0x980000 - 0x9fffff\r
573 m_read16_rom 0x13\r
574\r
cc68a136 575m_read16_misc:\r
cc68a136 576 bic r0, r0, #1\r
4ff2d527 577 mov r1, #16\r
578 b OtherRead16\r
cc68a136 579\r
580m_read16_vdp:\r
581 tst r0, #0x70000\r
582 tsteq r0, #0x000e0\r
583 bxne lr @ invalid read\r
cc68a136 584 bic r0, r0, #1\r
4ff2d527 585 b PicoVideoRead\r
cc68a136 586\r
587m_read16_ram:\r
588 ldr r1, =Pico\r
589 bic r0, r0, #0xff0000\r
590 bic r0, r0, #1\r
591 ldrh r0, [r1, r0]\r
592 bx lr\r
593\r
594m_read16_above_rom:\r
cc68a136 595 bic r0, r0, #1\r
4ff2d527 596 mov r1, #16\r
597 b OtherRead16End\r
cc68a136 598\r
599.pool\r
600\r
601@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
602\r
603.macro m_read32_rom sect\r
604 ldr r1, =(Pico+0x22200)\r
605 bic r0, r0, #0xf80000\r
606 ldr r1, [r1]\r
607 bic r0, r0, #1\r
608.if \sect\r
609 orr r0, r0, #0x080000*\sect\r
610.endif\r
611 ldrh r0, [r1, r0]!\r
612 ldrh r1, [r1, #2] @ 1ci\r
613 orr r0, r1, r0, lsl #16\r
614 bx lr\r
615.endm\r
616\r
617\r
618m_read32_rom0: @ 0x000000 - 0x07ffff\r
619 m_read32_rom 0\r
620\r
621m_read32_rom1: @ 0x080000 - 0x0fffff\r
622 m_read32_rom 1\r
623\r
624m_read32_rom2: @ 0x100000 - 0x17ffff\r
625 m_read32_rom 2\r
626\r
627m_read32_rom3: @ 0x180000 - 0x1fffff\r
628 m_read32_rom 3\r
629\r
630m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r
631 ldr r2, =(SRam)\r
632 ldr r3, =(Pico+0x22200)\r
633 ldr r1, [r2, #8] @ SRam.end\r
634 bic r0, r0, #0xf80000\r
635 bic r0, r0, #1\r
636 orr r0, r0, #0x200000\r
637 cmp r0, r1\r
638 bgt m_read32_nosram\r
639 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r
640 tst r1, #1\r
641 beq m_read32_nosram\r
642 ldr r1, [r2, #4] @ SRam.start (1ci)\r
643 cmp r0, r1\r
644 blt m_read32_nosram\r
645 ldr r2, [r2] @ SRam.data (1ci)\r
646 sub r2, r2, r1\r
647 ldrh r0, [r2, r0]! @ (1ci)\r
648 ldrh r1, [r2, #2]\r
649 orr r0, r0, r0, lsl #16\r
650 mov r0, r0, ror #8\r
651 mov r0, r0, lsl #16\r
652 orr r0, r0, r1, lsr #8\r
653 and r1, r1, #0xff\r
654 orr r0, r0, r1, lsl #8\r
655 bx lr\r
721cd396 656\r
cc68a136 657m_read32_nosram:\r
658 ldr r1, [r3, #4] @ (1ci)\r
659 cmp r0, r1\r
660 movgt r0, #0\r
661 bxgt lr @ bad location\r
662 ldr r1, [r3] @ (1ci)\r
663 ldrh r0, [r1, r0]!\r
664 ldrh r1, [r1, #2] @ (2ci)\r
665 orr r0, r1, r0, lsl #16\r
666 bx lr\r
667\r
668m_read32_rom5: @ 0x280000 - 0x2fffff\r
669 m_read32_rom 5\r
670\r
671m_read32_rom6: @ 0x300000 - 0x37ffff\r
672 m_read32_rom 6\r
673\r
674m_read32_rom7: @ 0x380000 - 0x3fffff\r
675 m_read32_rom 7\r
676\r
677m_read32_rom8: @ 0x400000 - 0x47ffff\r
678 m_read32_rom 8\r
679\r
680m_read32_rom9: @ 0x480000 - 0x4fffff\r
681 m_read32_rom 9\r
682\r
cc68a136 683m_read32_romA: @ 0x500000 - 0x57ffff\r
684 m_read32_rom 0xA\r
685\r
686m_read32_romB: @ 0x580000 - 0x5fffff\r
687 m_read32_rom 0xB\r
688\r
689m_read32_romC: @ 0x600000 - 0x67ffff\r
690 m_read32_rom 0xC\r
691\r
692m_read32_romD: @ 0x680000 - 0x6fffff\r
693 m_read32_rom 0xD\r
694\r
695m_read32_romE: @ 0x700000 - 0x77ffff\r
696 m_read32_rom 0xE\r
697\r
698m_read32_romF: @ 0x780000 - 0x7fffff\r
699 m_read32_rom 0xF\r
700\r
29a95187 701m_read32_rom10: @ 0x800000 - 0x87ffff\r
702 m_read32_rom 0x10\r
703\r
704m_read32_rom11: @ 0x880000 - 0x8fffff\r
705 m_read32_rom 0x11\r
706\r
707m_read32_rom12: @ 0x900000 - 0x97ffff\r
708 m_read32_rom 0x12\r
709\r
710m_read32_rom13: @ 0x980000 - 0x9fffff\r
711 m_read32_rom 0x13\r
712\r
cc68a136 713m_read32_misc:\r
714 bic r0, r0, #1\r
715 stmfd sp!,{r0,lr}\r
716 mov r1, #32\r
717 bl OtherRead16\r
718 mov r1, r0\r
719 ldmfd sp!,{r0}\r
720 stmfd sp!,{r1}\r
721 add r0, r0, #2\r
722 mov r1, #32\r
723 bl OtherRead16\r
724 ldmfd sp!,{r1,lr}\r
725 orr r0, r0, r1, lsl #16\r
726 bx lr\r
727\r
728m_read32_vdp:\r
729 tst r0, #0x70000\r
730 tsteq r0, #0x000e0\r
731 bxne lr @ invalid read\r
732 bic r0, r0, #1\r
4ff2d527 733 add r1, r0, #2\r
734 stmfd sp!,{r1,lr}\r
cc68a136 735 bl PicoVideoRead\r
4ff2d527 736 swp r0, r0, [sp]\r
cc68a136 737 bl PicoVideoRead\r
738 ldmfd sp!,{r1,lr}\r
739 orr r0, r0, r1, lsl #16\r
740 bx lr\r
741\r
742m_read32_ram:\r
743 ldr r1, =Pico\r
744 bic r0, r0, #0xff0000\r
745 bic r0, r0, #1\r
746 ldrh r0, [r1, r0]!\r
747 ldrh r1, [r1, #2] @ 2ci\r
748 orr r0, r1, r0, lsl #16\r
749 bx lr\r
750\r
751m_read32_above_rom:\r
752 bic r0, r0, #1\r
753 stmfd sp!,{r0,lr}\r
754 mov r1, #32\r
66fdc0f0 755 bl OtherRead16End\r
cc68a136 756 mov r1, r0\r
757 ldmfd sp!,{r0}\r
758 stmfd sp!,{r1}\r
759 add r0, r0, #2\r
760 mov r1, #32\r
66fdc0f0 761 bl OtherRead16End\r
cc68a136 762 ldmfd sp!,{r1,lr}\r
763 orr r0, r0, r1, lsl #16\r
764 bx lr\r
765\r
766.pool\r
767\r
768@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
769\r
770PicoWriteRomHW_SSF2: @ u32 a, u32 d\r
771 and r0, r0, #0xe\r
772 movs r0, r0, lsr #1\r
773 bne pwr_banking\r
774\r
775 @ sram register\r
776 ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r
721cd396 777 ldrb r0, [r2]\r
cc68a136 778 and r1, r1, #3\r
721cd396 779 bic r0, r0, #3\r
780 orr r0, r0, r1\r
781 strb r0, [r2]\r
cc68a136 782 bx lr\r
783\r
784pwr_banking:\r
785 and r1, r1, #0x1f\r
786\r
787 ldr r3, =m_read8_def_table\r
788 ldr r2, =m_read8_table\r
789 ldr r12, [r3, r1, lsl #2]\r
790 str r12, [r2, r0, lsl #2]\r
791\r
792 ldr r3, =m_read16_def_table\r
793 ldr r2, =m_read16_table\r
794 ldr r12, [r3, r1, lsl #2]\r
795 str r12, [r2, r0, lsl #2]\r
796\r
797 ldr r3, =m_read32_def_table\r
798 ldr r2, =m_read32_table\r
799 ldr r12, [r3, r1, lsl #2]\r
800 str r12, [r2, r0, lsl #2]\r
801 \r
802 bx lr\r
721cd396 803\r
e5503e2f 804@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
805\r
806@ Here we only handle most often used locations,\r
807@ everything else is passed to generic handlers\r
808\r
809PicoWrite8: @ u32 a, u8 d\r
810 bic r0, r0, #0xff000000\r
811 and r2, r0, #0x00e00000\r
812 cmp r2, #0x00e00000 @ RAM?\r
813 ldr r3, =Pico\r
814 biceq r0, r0, #0x00ff0000\r
815 eoreq r0, r0, #1\r
816 streqb r1, [r3, r0]\r
817 bxeq lr\r
818\r
819m_m68k_write8_misc:\r
820 bic r2, r0, #0x1f @ most commonly we get i/o port write,\r
821 cmp r2, #0xa10000 @ so check for it first\r
822 bne m_write8_misc2\r
823m_write8_io:\r
824 ldr r2, =PicoOpt\r
825 and r0, r0, #0x1e\r
826 ldr r2, [r2]\r
827 ldr r3, =(Pico+0x22000) @ Pico.ioports\r
828 tst r2, #0x20 @ 6 button pad?\r
829 streqb r1, [r3, r0, lsr #1]\r
830 bxeq lr\r
831 cmp r0, #2\r
832 cmpne r0, #4\r
833 bne m_write8_io_done @ not likely to happen\r
834 add r2, r3, #0x200 @ Pico+0x22200\r
835 mov r12,#0\r
836 cmp r0, #2\r
837 streqb r12,[r2,#0x18]\r
838 strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r
839 tst r1, #0x40 @ TH\r
840 beq m_write8_io_done\r
841 ldrb r12,[r3, r0, lsr #1]\r
842 tst r12,#0x40\r
843 bne m_write8_io_done\r
844 cmp r0, #2\r
845 ldreqb r12,[r2,#0x0a]\r
846 ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r
847 add r12,r12,#1\r
848 streqb r12,[r2,#0x0a]\r
849 strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r
850m_write8_io_done:\r
851 strb r1, [r3, r0, lsr #1]\r
852 bx lr\r
853\r
854\r
855m_write8_misc2:\r
856 and r2, r0, #0xff0000\r
857 cmp r2, #0xa00000 @ z80 area?\r
858 bne m_write8_not_z80\r
859 tst r0, #0x4000\r
860 bne m_write8_z80_not_ram\r
861 ldr r3, =(Pico+0x20000) @ Pico.zram\r
862 add r2, r3, #0x02200 @ Pico+0x22200\r
863 ldrb r2, [r2, #9] @ Pico.m.z80Run\r
864 bic r0, r0, #0xff0000\r
865 bic r0, r0, #0x00e000\r
866 tst r2, #1\r
867 streqb r1, [r3, r0] @ zram\r
868 bx lr\r
869\r
870m_write8_z80_not_ram:\r
871 and r2, r0, #0x6000\r
872 cmp r2, #0x4000\r
873 bne m_write8_z80_not_ym2612\r
874 ldr r2, =PicoOpt\r
875 and r0, r0, #3\r
876 ldr r2, [r2]\r
877 tst r2, #1\r
878 bxeq lr\r
879 stmfd sp!,{lr}\r
880.if EXTERNAL_YM2612\r
881 tst r2, #0x200\r
882 ldreq r2, =YM2612Write_\r
883 ldrne r2, =YM2612Write_940\r
884 mov lr, pc\r
885 bx r2\r
886.else\r
887 bl YM2612Write_\r
888.endif\r
889 ldr r2, =emustatus\r
890 ldmfd sp!,{lr}\r
891 ldr r1, [r2]\r
892 orr r1, r0, r2\r
893 str r1, [r2] @ emustatus|=YM2612Write(a&3, d);\r
894 bx lr\r
895\r
896m_write8_z80_not_ym2612: @ not too likely\r
897 mov r2, r0, lsl #17\r
898 bic r2, r2, #6<<17\r
899 mov r3, #0x7f00\r
900 orr r3, r3, #0x0011\r
901 cmp r3, r2, lsr #17 @ psg @ z80 area?\r
902 beq m_write8_psg\r
903 and r2, r0, #0x7f00\r
904 cmp r2, #0x6000 @ bank register?\r
905 bxne lr @ invalid write\r
906\r
907m_write8_z80_bank_reg:\r
908 ldr r3, =(Pico+0x22208) @ Pico.m\r
909 ldrh r2, [r3, #0x0a]\r
910 mov r1, r1, lsr #8\r
911 orr r2, r1, r2, lsr #1\r
912 bic r2, r2, #0xfe00\r
913 strh r2, [r3, #0x0a]\r
914 bx lr\r
915\r
916\r
917m_write8_not_z80:\r
918 and r2, r0, #0xe70000\r
919 cmp r2, #0xc00000 @ VDP area?\r
920 bne m_write8_misc4\r
921 and r2, r0, #0xf9\r
922 cmp r2, #0x11\r
923 bne m_write8_misc4\r
924m_write8_psg:\r
925 ldr r2, =PicoOpt\r
926 mov r0, r1\r
927 ldr r2, [r2]\r
928 tst r2, #2\r
929 bxeq lr\r
930 ldr r2, =SN76496Write\r
931 bx r2\r
932 \r
933\r
934m_write8_misc4:\r
935 @ passthrough\r
936 ldr r2, =OtherWrite8\r
937 bx r2\r
938\r
fast MegaDrive/MegaCD/32X emulator