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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
10\r
11.text\r
12\r
13@ default jump tables\r
14\r
15m_read8_def_table:\r
16 .long m_read8_rom0 @ 0x000000 - 0x07FFFF\r
17 .long m_read8_rom1 @ 0x080000 - 0x0FFFFF\r
18 .long m_read8_rom2 @ 0x100000 - 0x17FFFF\r
19 .long m_read8_rom3 @ 0x180000 - 0x1FFFFF\r
20 .long m_read8_rom4 @ 0x200000 - 0x27FFFF\r
21 .long m_read8_rom5 @ 0x280000 - 0x2FFFFF\r
22 .long m_read8_rom6 @ 0x300000 - 0x37FFFF\r
23 .long m_read8_rom7 @ 0x380000 - 0x3FFFFF\r
24 .long m_read8_rom8 @ 0x400000 - 0x47FFFF\r
25 .long m_read8_rom9 @ 0x480000 - 0x4FFFFF\r
26 .long m_read8_romA @ 0x500000 - 0x57FFFF\r
27 .long m_read8_romB @ 0x580000 - 0x5FFFFF\r
28 .long m_read8_romC @ 0x600000 - 0x67FFFF\r
29 .long m_read8_romD @ 0x680000 - 0x6FFFFF\r
30 .long m_read8_romE @ 0x700000 - 0x77FFFF\r
31 .long m_read8_romF @ 0x780000 - 0x7FFFFF\r
32 .long m_read_null @ 0x800000 - 0x87FFFF\r
33 .long m_read_null @ 0x880000 - 0x8FFFFF\r
34 .long m_read_null @ 0x900000 - 0x97FFFF\r
35 .long m_read_null @ 0x980000 - 0x9FFFFF\r
36 .long m_read8_misc @ 0xA00000 - 0xA7FFFF\r
37 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
38 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
39 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
40 .long m_read8_vdp @ 0xC00000 - 0xC7FFFF\r
41 .long m_read8_vdp @ 0xC80000 - 0xCFFFFF\r
42 .long m_read_null @ 0xD00000 - 0xD7FFFF\r
43 .long m_read_null @ 0xD80000 - 0xDFFFFF\r
44 .long m_read8_ram @ 0xE00000 - 0xE7FFFF\r
45 .long m_read8_ram @ 0xE80000 - 0xEFFFFF\r
46 .long m_read8_ram @ 0xF00000 - 0xF7FFFF\r
47 .long m_read8_ram @ 0xF80000 - 0xFFFFFF\r
48\r
49m_read16_def_table:\r
50 .long m_read16_rom0 @ 0x000000 - 0x07FFFF\r
51 .long m_read16_rom1 @ 0x080000 - 0x0FFFFF\r
52 .long m_read16_rom2 @ 0x100000 - 0x17FFFF\r
53 .long m_read16_rom3 @ 0x180000 - 0x1FFFFF\r
54 .long m_read16_rom4 @ 0x200000 - 0x27FFFF\r
55 .long m_read16_rom5 @ 0x280000 - 0x2FFFFF\r
56 .long m_read16_rom6 @ 0x300000 - 0x37FFFF\r
57 .long m_read16_rom7 @ 0x380000 - 0x3FFFFF\r
58 .long m_read16_rom8 @ 0x400000 - 0x47FFFF\r
59 .long m_read16_rom9 @ 0x480000 - 0x4FFFFF\r
60 .long m_read16_romA @ 0x500000 - 0x57FFFF\r
61 .long m_read16_romB @ 0x580000 - 0x5FFFFF\r
62 .long m_read16_romC @ 0x600000 - 0x67FFFF\r
63 .long m_read16_romD @ 0x680000 - 0x6FFFFF\r
64 .long m_read16_romE @ 0x700000 - 0x77FFFF\r
65 .long m_read16_romF @ 0x780000 - 0x7FFFFF\r
66 .long m_read_null @ 0x800000 - 0x87FFFF\r
67 .long m_read_null @ 0x880000 - 0x8FFFFF\r
68 .long m_read_null @ 0x900000 - 0x97FFFF\r
69 .long m_read_null @ 0x980000 - 0x9FFFFF\r
70 .long m_read16_misc @ 0xA00000 - 0xA7FFFF\r
71 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
72 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
73 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
74 .long m_read16_vdp @ 0xC00000 - 0xC7FFFF\r
75 .long m_read_null @ 0xC80000 - 0xCFFFFF\r
76 .long m_read_null @ 0xD00000 - 0xD7FFFF\r
77 .long m_read_null @ 0xD80000 - 0xDFFFFF\r
78 .long m_read16_ram @ 0xE00000 - 0xE7FFFF\r
79 .long m_read16_ram @ 0xE80000 - 0xEFFFFF\r
80 .long m_read16_ram @ 0xF00000 - 0xF7FFFF\r
81 .long m_read16_ram @ 0xF80000 - 0xFFFFFF\r
82\r
83m_read32_def_table:\r
84 .long m_read32_rom0 @ 0x000000 - 0x07FFFF\r
85 .long m_read32_rom1 @ 0x080000 - 0x0FFFFF\r
86 .long m_read32_rom2 @ 0x100000 - 0x17FFFF\r
87 .long m_read32_rom3 @ 0x180000 - 0x1FFFFF\r
88 .long m_read32_rom4 @ 0x200000 - 0x27FFFF\r
89 .long m_read32_rom5 @ 0x280000 - 0x2FFFFF\r
90 .long m_read32_rom6 @ 0x300000 - 0x37FFFF\r
91 .long m_read32_rom7 @ 0x380000 - 0x3FFFFF\r
92 .long m_read32_rom8 @ 0x400000 - 0x47FFFF\r
93 .long m_read32_rom9 @ 0x480000 - 0x4FFFFF\r
94 .long m_read32_romA @ 0x500000 - 0x57FFFF\r
95 .long m_read32_romB @ 0x580000 - 0x5FFFFF\r
96 .long m_read32_romC @ 0x600000 - 0x67FFFF\r
97 .long m_read32_romD @ 0x680000 - 0x6FFFFF\r
98 .long m_read32_romE @ 0x700000 - 0x77FFFF\r
99 .long m_read32_romF @ 0x780000 - 0x7FFFFF\r
100 .long m_read_null @ 0x800000 - 0x87FFFF\r
101 .long m_read_null @ 0x880000 - 0x8FFFFF\r
102 .long m_read_null @ 0x900000 - 0x97FFFF\r
103 .long m_read_null @ 0x980000 - 0x9FFFFF\r
104 .long m_read32_misc @ 0xA00000 - 0xA7FFFF\r
105 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
106 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
107 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
108 .long m_read32_vdp @ 0xC00000 - 0xC7FFFF\r
109 .long m_read_null @ 0xC80000 - 0xCFFFFF\r
110 .long m_read_null @ 0xD00000 - 0xD7FFFF\r
111 .long m_read_null @ 0xD80000 - 0xDFFFFF\r
112 .long m_read32_ram @ 0xE00000 - 0xE7FFFF\r
113 .long m_read32_ram @ 0xE80000 - 0xEFFFFF\r
114 .long m_read32_ram @ 0xF00000 - 0xF7FFFF\r
115 .long m_read32_ram @ 0xF80000 - 0xFFFFFF\r
116\r
117\r
118@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
119\r
120.bss\r
121@.section .bss, "brw"\r
122@.data\r
123\r
124@ used tables\r
125m_read8_table:\r
126 .skip 32*4\r
127\r
128m_read16_table:\r
129 .skip 32*4\r
130\r
131m_read32_table:\r
132 .skip 32*4\r
133\r
134\r
135@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
136\r
137.text\r
138\r
139.global PicoMemReset\r
140.global PicoRead8\r
141.global PicoRead16\r
142.global PicoRead32\r
143.global PicoWriteRomHW_SSF2\r
144\r
145\r
146PicoMemReset:\r
147 ldr r12,=(Pico+0x22204)\r
148 ldr r12,[r12] @ romsize\r
149 add r12,r12,#0x80000\r
150 sub r12,r12,#1\r
151 mov r12,r12,lsr #19\r
152\r
153 ldr r0, =m_read8_table\r
154 ldr r1, =m_read8_def_table\r
155 mov r2, #32\r
1561:\r
157 ldr r3, [r1], #4\r
158 str r3, [r0], #4\r
159 subs r2, r2, #1\r
160 bne 1b\r
161\r
162 ldr r0, =m_read16_table\r
163 ldr r1, =m_read16_def_table\r
164 mov r2, #32\r
1651:\r
166 subs r2, r2, #1\r
167 ldr r3, [r1], #4\r
168 str r3, [r0], #4\r
169 bne 1b\r
170\r
171 ldr r0, =m_read32_table\r
172 ldr r1, =m_read32_def_table\r
173 mov r2, #32\r
1741:\r
175 subs r2, r2, #1\r
176 ldr r3, [r1], #4\r
177 str r3, [r0], #4\r
178 bne 1b\r
179\r
180 @ update memhandlers according to ROM size\r
181 ldr r1, =m_read8_above_rom\r
182 ldr r0, =m_read8_table\r
183 mov r2, #16\r
1841:\r
185 sub r2, r2, #1\r
186 cmp r2, r12\r
187 blt 2f\r
188 cmp r2, #4\r
189 beq 1b @ do not touch the SRAM area\r
190 str r1, [r0, r2, lsl #2]\r
191 b 1b\r
1922:\r
193 ldr r1, =m_read16_above_rom\r
194 ldr r0, =m_read16_table\r
195 mov r2, #16\r
1961:\r
197 sub r2, r2, #1\r
198 cmp r2, r12\r
199 blt 2f\r
200 cmp r2, #4\r
201 beq 1b\r
202 str r1, [r0, r2, lsl #2]\r
203 b 1b\r
2042:\r
205 ldr r1, =m_read32_above_rom\r
206 ldr r0, =m_read32_table\r
207 mov r2, #16\r
2081:\r
209 sub r2, r2, #1\r
210 cmp r2, r12\r
211 blt 2f\r
212 cmp r2, #4\r
213 beq 1b\r
214 str r1, [r0, r2, lsl #2]\r
215 b 1b\r
2162:\r
217 bx lr\r
218\r
219.pool\r
220\r
221@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
222\r
223PicoRead8: @ u32 a\r
224 ldr r2, =m_read8_table\r
225 bic r0, r0, #0xff000000\r
226 and r1, r0, #0x00f80000\r
227 ldr pc, [r2, r1, lsr #17]\r
228\r
229PicoRead16: @ u32 a\r
230 ldr r2, =m_read16_table\r
231 bic r0, r0, #0xff000000\r
232 and r1, r0, #0x00f80000\r
233 ldr pc, [r2, r1, lsr #17]\r
234\r
235PicoRead32: @ u32 a\r
236 ldr r2, =m_read32_table\r
237 bic r0, r0, #0xff000000\r
238 and r1, r0, #0x00f80000\r
239 ldr pc, [r2, r1, lsr #17]\r
240\r
241.pool\r
242\r
243@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
244\r
245m_read_null:\r
246 mov r0, #0\r
247 bx lr\r
248\r
249\r
250.macro m_read8_rom sect\r
251 ldr r1, =(Pico+0x22200)\r
252 bic r0, r0, #0xf80000\r
253 ldr r1, [r1]\r
254.if \sect\r
255 orr r0, r0, #0x080000*\sect\r
256.endif\r
257 eor r0, r0, #1\r
258 ldrb r0, [r1, r0]\r
259 bx lr\r
260.endm\r
261\r
262\r
263m_read8_rom0: @ 0x000000 - 0x07ffff\r
264 m_read8_rom 0\r
265\r
266m_read8_rom1: @ 0x080000 - 0x0fffff\r
267 m_read8_rom 1\r
268\r
269m_read8_rom2: @ 0x100000 - 0x17ffff\r
270 m_read8_rom 2\r
271\r
272m_read8_rom3: @ 0x180000 - 0x1fffff\r
273 m_read8_rom 3\r
274\r
275m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area\r
276 ldr r2, =(SRam)\r
277 ldr r3, =(Pico+0x22200)\r
278 ldr r1, [r2, #8] @ SRam.end\r
279 bic r0, r0, #0xf80000\r
280 orr r0, r0, #0x200000\r
281 cmp r0, r1\r
282 bgt m_read8_nosram\r
283 ldr r1, [r2, #4] @ SRam.start (1ci)\r
284 cmp r0, r1\r
285 blt m_read8_nosram\r
286 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (1ci)\r
287 sub r12,r0, #0x200000\r
288 tst r1, #0x10\r
289 bne m_read8_detected\r
290 cmp r12,#1\r
291 ble m_read8_detected\r
292 tst r1, #1\r
293 orrne r1, r1, #0x10\r
294 strneb r1, [r3, #0x11]\r
295m_read8_detected:\r
296 tst r1, #4 @ EEPROM read?\r
297 ldrne r0, =SRAMReadEEPROM @ (1ci if ne)\r
298 bxne r0\r
299m_read8_noteeprom:\r
300 tst r1, #1\r
301 beq m_read8_nosram\r
302 ldr r3, [r2] @ SRam.data\r
303 ldr r2, [r2, #4] @ SRam.start (1ci)\r
304 sub r3, r3, r2\r
305 ldrb r0, [r3, r0]\r
306 bx lr\r
307m_read8_nosram:\r
308 ldr r1, [r3, #4] @ 1ci\r
309 cmp r0, r1\r
310 movgt r0, #0\r
311 bxgt lr @ bad location\r
312 ldr r1, [r3]\r
313 eor r0, r0, #1\r
314 ldrb r0, [r1, r0]\r
315 bx lr\r
316\r
317m_read8_rom5: @ 0x280000 - 0x2fffff\r
318 m_read8_rom 5\r
319\r
320m_read8_rom6: @ 0x300000 - 0x37ffff\r
321 m_read8_rom 6\r
322\r
323m_read8_rom7: @ 0x380000 - 0x3fffff\r
324 m_read8_rom 7\r
325\r
326m_read8_rom8: @ 0x400000 - 0x47ffff\r
327 m_read8_rom 8\r
328\r
329m_read8_rom9: @ 0x480000 - 0x4fffff\r
330 m_read8_rom 9\r
331\r
332@ is any ROM using that much?\r
333m_read8_romA: @ 0x500000 - 0x57ffff\r
334 m_read8_rom 0xA\r
335\r
336m_read8_romB: @ 0x580000 - 0x5fffff\r
337 m_read8_rom 0xB\r
338\r
339m_read8_romC: @ 0x600000 - 0x67ffff\r
340 m_read8_rom 0xC\r
341\r
342m_read8_romD: @ 0x680000 - 0x6fffff\r
343 m_read8_rom 0xD\r
344\r
345m_read8_romE: @ 0x700000 - 0x77ffff\r
346 m_read8_rom 0xE\r
347\r
348m_read8_romF: @ 0x780000 - 0x7fffff\r
349 m_read8_rom 0xF\r
350\r
351m_read8_misc:\r
352 bic r2, r0, #0x00ff\r
353 bic r2, r2, #0xbf00\r
354 cmp r2, #0xa00000 @ Z80 RAM?\r
355 ldreq r2, =z80Read8\r
356 bxeq r2\r
357 stmfd sp!,{r0,lr}\r
358 bic r0, r0, #1\r
359 mov r1, #8\r
360 bl OtherRead16\r
361 ldmfd sp!,{r1,lr}\r
362 tst r1, #1\r
363 moveq r0, r0, lsr #8\r
364 bx lr\r
365\r
366m_read8_vdp:\r
367 tst r0, #0x70000\r
368 tsteq r0, #0x000e0\r
369 bxne lr @ invalid read\r
370 stmfd sp!,{r0,lr}\r
371 bic r0, r0, #1\r
372 bl PicoVideoRead\r
373 ldmfd sp!,{r1,lr}\r
374 tst r1, #1\r
375 moveq r0, r0, lsr #8\r
376 bx lr\r
377\r
378m_read8_ram:\r
379 ldr r1, =Pico\r
380 bic r0, r0, #0xff0000\r
381 eor r0, r0, #1\r
382 ldrb r0, [r1, r0]\r
383 bx lr\r
384\r
385m_read8_above_rom:\r
386 stmfd sp!,{r0,lr}\r
387 bic r0, r0, #1\r
388 mov r1, #8\r
66fdc0f0 389 bl OtherRead16End\r
cc68a136 390 ldmfd sp!,{r1,lr}\r
391 tst r1, #1\r
392 moveq r0, r0, lsr #8\r
393 bx lr\r
394\r
395.pool\r
396\r
397@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
398\r
399.macro m_read16_rom sect\r
400 ldr r1, =(Pico+0x22200)\r
401 bic r0, r0, #0xf80000\r
402 ldr r1, [r1]\r
403 bic r0, r0, #1\r
404.if \sect\r
405 orr r0, r0, #0x080000*\sect\r
406.endif\r
407 ldrh r0, [r1, r0]\r
408 bx lr\r
409.endm\r
410\r
411\r
412m_read16_rom0: @ 0x000000 - 0x07ffff\r
413 m_read16_rom 0\r
414\r
415m_read16_rom1: @ 0x080000 - 0x0fffff\r
416 m_read16_rom 1\r
417\r
418m_read16_rom2: @ 0x100000 - 0x17ffff\r
419 m_read16_rom 2\r
420\r
421m_read16_rom3: @ 0x180000 - 0x1fffff\r
422 m_read16_rom 3\r
423\r
424m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r
425 ldr r2, =(SRam)\r
426 ldr r3, =(Pico+0x22200)\r
427 ldr r1, [r2, #8] @ SRam.end\r
428 bic r0, r0, #0xf80000\r
429 bic r0, r0, #1\r
430 orr r0, r0, #0x200000\r
431 cmp r0, r1\r
432 bgt m_read16_nosram\r
433 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r
434 tst r1, #1\r
435 beq m_read16_nosram\r
436 ldr r1, [r2, #4] @ SRam.start (1ci)\r
437 cmp r0, r1\r
438 blt m_read16_nosram\r
439 ldr r2, [r2] @ SRam.data (1ci)\r
440 sub r2, r2, r1\r
441 ldrh r0, [r2, r0] @ 2ci\r
442 and r1, r0, #0xff\r
443 mov r0, r0, lsr #8\r
444 orr r0, r0, r1, lsl #8\r
445 bx lr\r
721cd396 446\r
cc68a136 447m_read16_nosram:\r
448 ldr r1, [r3, #4] @ 1ci\r
449 cmp r0, r1\r
450 movgt r0, #0\r
451 bxgt lr @ bad location\r
452 ldr r1, [r3] @ 1ci\r
453 ldrh r0, [r1, r0]\r
454 bx lr\r
455\r
456m_read16_rom5: @ 0x280000 - 0x2fffff\r
457 m_read16_rom 5\r
458\r
459m_read16_rom6: @ 0x300000 - 0x37ffff\r
460 m_read16_rom 6\r
461\r
462m_read16_rom7: @ 0x380000 - 0x3fffff\r
463 m_read16_rom 7\r
464\r
465m_read16_rom8: @ 0x400000 - 0x47ffff\r
466 m_read16_rom 8\r
467\r
468m_read16_rom9: @ 0x480000 - 0x4fffff\r
469 m_read16_rom 9\r
470\r
471@ is any ROM using that much?\r
472m_read16_romA: @ 0x500000 - 0x57ffff\r
473 m_read16_rom 0xA\r
474\r
475m_read16_romB: @ 0x580000 - 0x5fffff\r
476 m_read16_rom 0xB\r
477\r
478m_read16_romC: @ 0x600000 - 0x67ffff\r
479 m_read16_rom 0xC\r
480\r
481m_read16_romD: @ 0x680000 - 0x6fffff\r
482 m_read16_rom 0xD\r
483\r
484m_read16_romE: @ 0x700000 - 0x77ffff\r
485 m_read16_rom 0xE\r
486\r
487m_read16_romF: @ 0x780000 - 0x7fffff\r
488 m_read16_rom 0xF\r
489\r
490m_read16_misc:\r
cc68a136 491 bic r0, r0, #1\r
4ff2d527 492 mov r1, #16\r
493 b OtherRead16\r
cc68a136 494\r
495m_read16_vdp:\r
496 tst r0, #0x70000\r
497 tsteq r0, #0x000e0\r
498 bxne lr @ invalid read\r
cc68a136 499 bic r0, r0, #1\r
4ff2d527 500 b PicoVideoRead\r
cc68a136 501\r
502m_read16_ram:\r
503 ldr r1, =Pico\r
504 bic r0, r0, #0xff0000\r
505 bic r0, r0, #1\r
506 ldrh r0, [r1, r0]\r
507 bx lr\r
508\r
509m_read16_above_rom:\r
cc68a136 510 bic r0, r0, #1\r
4ff2d527 511 mov r1, #16\r
512 b OtherRead16End\r
cc68a136 513\r
514.pool\r
515\r
516@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
517\r
518.macro m_read32_rom sect\r
519 ldr r1, =(Pico+0x22200)\r
520 bic r0, r0, #0xf80000\r
521 ldr r1, [r1]\r
522 bic r0, r0, #1\r
523.if \sect\r
524 orr r0, r0, #0x080000*\sect\r
525.endif\r
526 ldrh r0, [r1, r0]!\r
527 ldrh r1, [r1, #2] @ 1ci\r
528 orr r0, r1, r0, lsl #16\r
529 bx lr\r
530.endm\r
531\r
532\r
533m_read32_rom0: @ 0x000000 - 0x07ffff\r
534 m_read32_rom 0\r
535\r
536m_read32_rom1: @ 0x080000 - 0x0fffff\r
537 m_read32_rom 1\r
538\r
539m_read32_rom2: @ 0x100000 - 0x17ffff\r
540 m_read32_rom 2\r
541\r
542m_read32_rom3: @ 0x180000 - 0x1fffff\r
543 m_read32_rom 3\r
544\r
545m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r
546 ldr r2, =(SRam)\r
547 ldr r3, =(Pico+0x22200)\r
548 ldr r1, [r2, #8] @ SRam.end\r
549 bic r0, r0, #0xf80000\r
550 bic r0, r0, #1\r
551 orr r0, r0, #0x200000\r
552 cmp r0, r1\r
553 bgt m_read32_nosram\r
554 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r
555 tst r1, #1\r
556 beq m_read32_nosram\r
557 ldr r1, [r2, #4] @ SRam.start (1ci)\r
558 cmp r0, r1\r
559 blt m_read32_nosram\r
560 ldr r2, [r2] @ SRam.data (1ci)\r
561 sub r2, r2, r1\r
562 ldrh r0, [r2, r0]! @ (1ci)\r
563 ldrh r1, [r2, #2]\r
564 orr r0, r0, r0, lsl #16\r
565 mov r0, r0, ror #8\r
566 mov r0, r0, lsl #16\r
567 orr r0, r0, r1, lsr #8\r
568 and r1, r1, #0xff\r
569 orr r0, r0, r1, lsl #8\r
570 bx lr\r
721cd396 571\r
cc68a136 572m_read32_nosram:\r
573 ldr r1, [r3, #4] @ (1ci)\r
574 cmp r0, r1\r
575 movgt r0, #0\r
576 bxgt lr @ bad location\r
577 ldr r1, [r3] @ (1ci)\r
578 ldrh r0, [r1, r0]!\r
579 ldrh r1, [r1, #2] @ (2ci)\r
580 orr r0, r1, r0, lsl #16\r
581 bx lr\r
582\r
583m_read32_rom5: @ 0x280000 - 0x2fffff\r
584 m_read32_rom 5\r
585\r
586m_read32_rom6: @ 0x300000 - 0x37ffff\r
587 m_read32_rom 6\r
588\r
589m_read32_rom7: @ 0x380000 - 0x3fffff\r
590 m_read32_rom 7\r
591\r
592m_read32_rom8: @ 0x400000 - 0x47ffff\r
593 m_read32_rom 8\r
594\r
595m_read32_rom9: @ 0x480000 - 0x4fffff\r
596 m_read32_rom 9\r
597\r
598@ is any ROM using that much?\r
599m_read32_romA: @ 0x500000 - 0x57ffff\r
600 m_read32_rom 0xA\r
601\r
602m_read32_romB: @ 0x580000 - 0x5fffff\r
603 m_read32_rom 0xB\r
604\r
605m_read32_romC: @ 0x600000 - 0x67ffff\r
606 m_read32_rom 0xC\r
607\r
608m_read32_romD: @ 0x680000 - 0x6fffff\r
609 m_read32_rom 0xD\r
610\r
611m_read32_romE: @ 0x700000 - 0x77ffff\r
612 m_read32_rom 0xE\r
613\r
614m_read32_romF: @ 0x780000 - 0x7fffff\r
615 m_read32_rom 0xF\r
616\r
617m_read32_misc:\r
618 bic r0, r0, #1\r
619 stmfd sp!,{r0,lr}\r
620 mov r1, #32\r
621 bl OtherRead16\r
622 mov r1, r0\r
623 ldmfd sp!,{r0}\r
624 stmfd sp!,{r1}\r
625 add r0, r0, #2\r
626 mov r1, #32\r
627 bl OtherRead16\r
628 ldmfd sp!,{r1,lr}\r
629 orr r0, r0, r1, lsl #16\r
630 bx lr\r
631\r
632m_read32_vdp:\r
633 tst r0, #0x70000\r
634 tsteq r0, #0x000e0\r
635 bxne lr @ invalid read\r
636 bic r0, r0, #1\r
4ff2d527 637 add r1, r0, #2\r
638 stmfd sp!,{r1,lr}\r
cc68a136 639 bl PicoVideoRead\r
4ff2d527 640 swp r0, r0, [sp]\r
cc68a136 641 bl PicoVideoRead\r
642 ldmfd sp!,{r1,lr}\r
643 orr r0, r0, r1, lsl #16\r
644 bx lr\r
645\r
646m_read32_ram:\r
647 ldr r1, =Pico\r
648 bic r0, r0, #0xff0000\r
649 bic r0, r0, #1\r
650 ldrh r0, [r1, r0]!\r
651 ldrh r1, [r1, #2] @ 2ci\r
652 orr r0, r1, r0, lsl #16\r
653 bx lr\r
654\r
655m_read32_above_rom:\r
656 bic r0, r0, #1\r
657 stmfd sp!,{r0,lr}\r
658 mov r1, #32\r
66fdc0f0 659 bl OtherRead16End\r
cc68a136 660 mov r1, r0\r
661 ldmfd sp!,{r0}\r
662 stmfd sp!,{r1}\r
663 add r0, r0, #2\r
664 mov r1, #32\r
66fdc0f0 665 bl OtherRead16End\r
cc68a136 666 ldmfd sp!,{r1,lr}\r
667 orr r0, r0, r1, lsl #16\r
668 bx lr\r
669\r
670.pool\r
671\r
672@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
673\r
674PicoWriteRomHW_SSF2: @ u32 a, u32 d\r
675 and r0, r0, #0xe\r
676 movs r0, r0, lsr #1\r
677 bne pwr_banking\r
678\r
679 @ sram register\r
680 ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r
721cd396 681 ldrb r0, [r2]\r
cc68a136 682 and r1, r1, #3\r
721cd396 683 bic r0, r0, #3\r
684 orr r0, r0, r1\r
685 strb r0, [r2]\r
cc68a136 686 bx lr\r
687\r
688pwr_banking:\r
689 and r1, r1, #0x1f\r
690\r
691 ldr r3, =m_read8_def_table\r
692 ldr r2, =m_read8_table\r
693 ldr r12, [r3, r1, lsl #2]\r
694 str r12, [r2, r0, lsl #2]\r
695\r
696 ldr r3, =m_read16_def_table\r
697 ldr r2, =m_read16_table\r
698 ldr r12, [r3, r1, lsl #2]\r
699 str r12, [r2, r0, lsl #2]\r
700\r
701 ldr r3, =m_read32_def_table\r
702 ldr r2, =m_read32_table\r
703 ldr r12, [r3, r1, lsl #2]\r
704 str r12, [r2, r0, lsl #2]\r
705 \r
706 bx lr\r
721cd396 707\r
fast MegaDrive/MegaCD/32X emulator