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psp memhandlers, vsync, stuff
[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
3ec29f01 13.align 4\r
cc68a136 14\r
15@ default jump tables\r
16\r
17m_read8_def_table:\r
18 .long m_read8_rom0 @ 0x000000 - 0x07FFFF\r
19 .long m_read8_rom1 @ 0x080000 - 0x0FFFFF\r
20 .long m_read8_rom2 @ 0x100000 - 0x17FFFF\r
21 .long m_read8_rom3 @ 0x180000 - 0x1FFFFF\r
22 .long m_read8_rom4 @ 0x200000 - 0x27FFFF\r
23 .long m_read8_rom5 @ 0x280000 - 0x2FFFFF\r
24 .long m_read8_rom6 @ 0x300000 - 0x37FFFF\r
25 .long m_read8_rom7 @ 0x380000 - 0x3FFFFF\r
29a95187 26 .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks\r
cc68a136 27 .long m_read8_rom9 @ 0x480000 - 0x4FFFFF\r
28 .long m_read8_romA @ 0x500000 - 0x57FFFF\r
29 .long m_read8_romB @ 0x580000 - 0x5FFFFF\r
30 .long m_read8_romC @ 0x600000 - 0x67FFFF\r
31 .long m_read8_romD @ 0x680000 - 0x6FFFFF\r
32 .long m_read8_romE @ 0x700000 - 0x77FFFF\r
33 .long m_read8_romF @ 0x780000 - 0x7FFFFF\r
29a95187 34 .long m_read8_rom10 @ 0x800000 - 0x87FFFF\r
35 .long m_read8_rom11 @ 0x880000 - 0x8FFFFF\r
36 .long m_read8_rom12 @ 0x900000 - 0x97FFFF\r
37 .long m_read8_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 38 .long m_read8_misc @ 0xA00000 - 0xA7FFFF\r
39 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
40 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
41 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
42 .long m_read8_vdp @ 0xC00000 - 0xC7FFFF\r
43 .long m_read8_vdp @ 0xC80000 - 0xCFFFFF\r
7969166e 44 .long m_read8_vdp @ 0xD00000 - 0xD7FFFF\r
45 .long m_read8_vdp @ 0xD80000 - 0xDFFFFF\r
cc68a136 46 .long m_read8_ram @ 0xE00000 - 0xE7FFFF\r
47 .long m_read8_ram @ 0xE80000 - 0xEFFFFF\r
48 .long m_read8_ram @ 0xF00000 - 0xF7FFFF\r
49 .long m_read8_ram @ 0xF80000 - 0xFFFFFF\r
50\r
51m_read16_def_table:\r
52 .long m_read16_rom0 @ 0x000000 - 0x07FFFF\r
53 .long m_read16_rom1 @ 0x080000 - 0x0FFFFF\r
54 .long m_read16_rom2 @ 0x100000 - 0x17FFFF\r
55 .long m_read16_rom3 @ 0x180000 - 0x1FFFFF\r
56 .long m_read16_rom4 @ 0x200000 - 0x27FFFF\r
57 .long m_read16_rom5 @ 0x280000 - 0x2FFFFF\r
58 .long m_read16_rom6 @ 0x300000 - 0x37FFFF\r
59 .long m_read16_rom7 @ 0x380000 - 0x3FFFFF\r
60 .long m_read16_rom8 @ 0x400000 - 0x47FFFF\r
61 .long m_read16_rom9 @ 0x480000 - 0x4FFFFF\r
62 .long m_read16_romA @ 0x500000 - 0x57FFFF\r
63 .long m_read16_romB @ 0x580000 - 0x5FFFFF\r
64 .long m_read16_romC @ 0x600000 - 0x67FFFF\r
65 .long m_read16_romD @ 0x680000 - 0x6FFFFF\r
66 .long m_read16_romE @ 0x700000 - 0x77FFFF\r
67 .long m_read16_romF @ 0x780000 - 0x7FFFFF\r
29a95187 68 .long m_read16_rom10 @ 0x800000 - 0x87FFFF\r
69 .long m_read16_rom11 @ 0x880000 - 0x8FFFFF\r
70 .long m_read16_rom12 @ 0x900000 - 0x97FFFF\r
71 .long m_read16_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 72 .long m_read16_misc @ 0xA00000 - 0xA7FFFF\r
73 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
74 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
75 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
76 .long m_read16_vdp @ 0xC00000 - 0xC7FFFF\r
7969166e 77 .long m_read16_vdp @ 0xC80000 - 0xCFFFFF\r
78 .long m_read16_vdp @ 0xD00000 - 0xD7FFFF\r
79 .long m_read16_vdp @ 0xD80000 - 0xDFFFFF\r
cc68a136 80 .long m_read16_ram @ 0xE00000 - 0xE7FFFF\r
81 .long m_read16_ram @ 0xE80000 - 0xEFFFFF\r
82 .long m_read16_ram @ 0xF00000 - 0xF7FFFF\r
83 .long m_read16_ram @ 0xF80000 - 0xFFFFFF\r
84\r
85m_read32_def_table:\r
86 .long m_read32_rom0 @ 0x000000 - 0x07FFFF\r
87 .long m_read32_rom1 @ 0x080000 - 0x0FFFFF\r
88 .long m_read32_rom2 @ 0x100000 - 0x17FFFF\r
89 .long m_read32_rom3 @ 0x180000 - 0x1FFFFF\r
90 .long m_read32_rom4 @ 0x200000 - 0x27FFFF\r
91 .long m_read32_rom5 @ 0x280000 - 0x2FFFFF\r
92 .long m_read32_rom6 @ 0x300000 - 0x37FFFF\r
93 .long m_read32_rom7 @ 0x380000 - 0x3FFFFF\r
94 .long m_read32_rom8 @ 0x400000 - 0x47FFFF\r
95 .long m_read32_rom9 @ 0x480000 - 0x4FFFFF\r
96 .long m_read32_romA @ 0x500000 - 0x57FFFF\r
97 .long m_read32_romB @ 0x580000 - 0x5FFFFF\r
98 .long m_read32_romC @ 0x600000 - 0x67FFFF\r
99 .long m_read32_romD @ 0x680000 - 0x6FFFFF\r
100 .long m_read32_romE @ 0x700000 - 0x77FFFF\r
101 .long m_read32_romF @ 0x780000 - 0x7FFFFF\r
29a95187 102 .long m_read32_rom10 @ 0x800000 - 0x87FFFF\r
103 .long m_read32_rom11 @ 0x880000 - 0x8FFFFF\r
104 .long m_read32_rom12 @ 0x900000 - 0x97FFFF\r
105 .long m_read32_rom13 @ 0x980000 - 0x9FFFFF\r
cc68a136 106 .long m_read32_misc @ 0xA00000 - 0xA7FFFF\r
107 .long m_read_null @ 0xA80000 - 0xAFFFFF\r
108 .long m_read_null @ 0xB00000 - 0xB7FFFF\r
109 .long m_read_null @ 0xB80000 - 0xBFFFFF\r
110 .long m_read32_vdp @ 0xC00000 - 0xC7FFFF\r
7969166e 111 .long m_read32_vdp @ 0xC80000 - 0xCFFFFF\r
112 .long m_read32_vdp @ 0xD00000 - 0xD7FFFF\r
113 .long m_read32_vdp @ 0xD80000 - 0xDFFFFF\r
cc68a136 114 .long m_read32_ram @ 0xE00000 - 0xE7FFFF\r
115 .long m_read32_ram @ 0xE80000 - 0xEFFFFF\r
116 .long m_read32_ram @ 0xF00000 - 0xF7FFFF\r
117 .long m_read32_ram @ 0xF80000 - 0xFFFFFF\r
118\r
119\r
120@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
121\r
122.bss\r
3ec29f01 123.align 4\r
cc68a136 124@.section .bss, "brw"\r
125@.data\r
126\r
127@ used tables\r
128m_read8_table:\r
129 .skip 32*4\r
130\r
131m_read16_table:\r
132 .skip 32*4\r
133\r
134m_read32_table:\r
135 .skip 32*4\r
136\r
137\r
138@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
139\r
140.text\r
3ec29f01 141.align 4\r
cc68a136 142\r
143.global PicoMemReset\r
144.global PicoRead8\r
145.global PicoRead16\r
146.global PicoRead32\r
e5503e2f 147.global PicoWrite8\r
cc68a136 148.global PicoWriteRomHW_SSF2\r
e5503e2f 149.global m_m68k_read8_misc\r
150.global m_m68k_write8_misc\r
cc68a136 151\r
152\r
153PicoMemReset:\r
154 ldr r12,=(Pico+0x22204)\r
155 ldr r12,[r12] @ romsize\r
156 add r12,r12,#0x80000\r
157 sub r12,r12,#1\r
158 mov r12,r12,lsr #19\r
159\r
160 ldr r0, =m_read8_table\r
161 ldr r1, =m_read8_def_table\r
162 mov r2, #32\r
1631:\r
164 ldr r3, [r1], #4\r
165 str r3, [r0], #4\r
166 subs r2, r2, #1\r
167 bne 1b\r
168\r
169 ldr r0, =m_read16_table\r
170 ldr r1, =m_read16_def_table\r
171 mov r2, #32\r
1721:\r
173 subs r2, r2, #1\r
174 ldr r3, [r1], #4\r
175 str r3, [r0], #4\r
176 bne 1b\r
177\r
178 ldr r0, =m_read32_table\r
179 ldr r1, =m_read32_def_table\r
180 mov r2, #32\r
1811:\r
182 subs r2, r2, #1\r
183 ldr r3, [r1], #4\r
184 str r3, [r0], #4\r
185 bne 1b\r
186\r
187 @ update memhandlers according to ROM size\r
188 ldr r1, =m_read8_above_rom\r
189 ldr r0, =m_read8_table\r
3ec29f01 190 mov r2, #20\r
cc68a136 1911:\r
192 sub r2, r2, #1\r
193 cmp r2, r12\r
194 blt 2f\r
195 cmp r2, #4\r
196 beq 1b @ do not touch the SRAM area\r
197 str r1, [r0, r2, lsl #2]\r
198 b 1b\r
1992:\r
200 ldr r1, =m_read16_above_rom\r
201 ldr r0, =m_read16_table\r
3ec29f01 202 mov r2, #20\r
cc68a136 2031:\r
204 sub r2, r2, #1\r
205 cmp r2, r12\r
206 blt 2f\r
207 cmp r2, #4\r
208 beq 1b\r
209 str r1, [r0, r2, lsl #2]\r
210 b 1b\r
2112:\r
212 ldr r1, =m_read32_above_rom\r
213 ldr r0, =m_read32_table\r
3ec29f01 214 mov r2, #20\r
cc68a136 2151:\r
216 sub r2, r2, #1\r
217 cmp r2, r12\r
218 blt 2f\r
219 cmp r2, #4\r
220 beq 1b\r
221 str r1, [r0, r2, lsl #2]\r
222 b 1b\r
2232:\r
224 bx lr\r
225\r
226.pool\r
227\r
228@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
229\r
230PicoRead8: @ u32 a\r
231 ldr r2, =m_read8_table\r
232 bic r0, r0, #0xff000000\r
233 and r1, r0, #0x00f80000\r
234 ldr pc, [r2, r1, lsr #17]\r
235\r
236PicoRead16: @ u32 a\r
237 ldr r2, =m_read16_table\r
238 bic r0, r0, #0xff000000\r
239 and r1, r0, #0x00f80000\r
240 ldr pc, [r2, r1, lsr #17]\r
241\r
242PicoRead32: @ u32 a\r
243 ldr r2, =m_read32_table\r
244 bic r0, r0, #0xff000000\r
245 and r1, r0, #0x00f80000\r
246 ldr pc, [r2, r1, lsr #17]\r
247\r
248.pool\r
249\r
250@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
251\r
252m_read_null:\r
253 mov r0, #0\r
254 bx lr\r
255\r
256\r
257.macro m_read8_rom sect\r
258 ldr r1, =(Pico+0x22200)\r
259 bic r0, r0, #0xf80000\r
260 ldr r1, [r1]\r
261.if \sect\r
262 orr r0, r0, #0x080000*\sect\r
263.endif\r
264 eor r0, r0, #1\r
265 ldrb r0, [r1, r0]\r
266 bx lr\r
267.endm\r
268\r
269\r
270m_read8_rom0: @ 0x000000 - 0x07ffff\r
271 m_read8_rom 0\r
272\r
273m_read8_rom1: @ 0x080000 - 0x0fffff\r
274 m_read8_rom 1\r
275\r
276m_read8_rom2: @ 0x100000 - 0x17ffff\r
277 m_read8_rom 2\r
278\r
279m_read8_rom3: @ 0x180000 - 0x1fffff\r
280 m_read8_rom 3\r
281\r
282m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area\r
283 ldr r2, =(SRam)\r
284 ldr r3, =(Pico+0x22200)\r
285 ldr r1, [r2, #8] @ SRam.end\r
286 bic r0, r0, #0xf80000\r
287 orr r0, r0, #0x200000\r
288 cmp r0, r1\r
289 bgt m_read8_nosram\r
7969166e 290 ldr r1, [r2, #4] @ SRam.start\r
cc68a136 291 cmp r0, r1\r
292 blt m_read8_nosram\r
7969166e 293 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
294 tst r1, #5\r
295 bne SRAMRead\r
cc68a136 296m_read8_nosram:\r
7969166e 297 ldr r1, [r3, #4] @ romsize\r
cc68a136 298 cmp r0, r1\r
299 movgt r0, #0\r
300 bxgt lr @ bad location\r
301 ldr r1, [r3]\r
302 eor r0, r0, #1\r
303 ldrb r0, [r1, r0]\r
304 bx lr\r
305\r
306m_read8_rom5: @ 0x280000 - 0x2fffff\r
307 m_read8_rom 5\r
308\r
309m_read8_rom6: @ 0x300000 - 0x37ffff\r
310 m_read8_rom 6\r
311\r
312m_read8_rom7: @ 0x380000 - 0x3fffff\r
313 m_read8_rom 7\r
314\r
315m_read8_rom8: @ 0x400000 - 0x47ffff\r
316 m_read8_rom 8\r
317\r
318m_read8_rom9: @ 0x480000 - 0x4fffff\r
319 m_read8_rom 9\r
320\r
cc68a136 321m_read8_romA: @ 0x500000 - 0x57ffff\r
322 m_read8_rom 0xA\r
323\r
324m_read8_romB: @ 0x580000 - 0x5fffff\r
325 m_read8_rom 0xB\r
326\r
327m_read8_romC: @ 0x600000 - 0x67ffff\r
328 m_read8_rom 0xC\r
329\r
330m_read8_romD: @ 0x680000 - 0x6fffff\r
331 m_read8_rom 0xD\r
332\r
333m_read8_romE: @ 0x700000 - 0x77ffff\r
334 m_read8_rom 0xE\r
335\r
336m_read8_romF: @ 0x780000 - 0x7fffff\r
337 m_read8_rom 0xF\r
338\r
29a95187 339m_read8_rom10: @ 0x800000 - 0x87ffff\r
340 m_read8_rom 0x10\r
341\r
342m_read8_rom11: @ 0x880000 - 0x8fffff\r
343 m_read8_rom 0x11\r
344\r
345m_read8_rom12: @ 0x900000 - 0x97ffff\r
346 m_read8_rom 0x12\r
347\r
348m_read8_rom13: @ 0x980000 - 0x9fffff\r
349 m_read8_rom 0x13\r
350\r
e5503e2f 351\r
352m_m68k_read8_misc:\r
cc68a136 353m_read8_misc:\r
e5503e2f 354 bic r2, r0, #0x001f @ most commonly we get i/o port read,\r
355 cmp r2, #0xa10000 @ so check for it first\r
356 bne m_read8_misc2\r
357m_read8_misc_io:\r
358 ands r0, r0, #0x1e\r
359 beq m_read8_misc_hwreg\r
360 cmp r0, #4\r
e5503e2f 361 movlt r0, #0\r
362 moveq r0, #1\r
bf537655 363 ble PadRead\r
e5503e2f 364 ldr r3, =(Pico+0x22000)\r
365 mov r0, r0, lsr #1 @ other IO ports (Pico.ioports[a])\r
366 ldrb r0, [r3, r0]\r
367 bx lr\r
368\r
369m_read8_misc_hwreg:\r
370 ldr r3, =(Pico+0x22200)\r
371 ldrb r0, [r3, #0x0f] @ Pico.m.hardware\r
372 bx lr\r
373\r
374m_read8_misc2:\r
375 mov r2, #0xa10000 @ games also like to poll busreq,\r
376 orr r2, r2, #0x001100 @ so we'll try it now\r
377 cmp r0, r2\r
bf537655 378 beq z80ReadBusReq\r
e5503e2f 379\r
380 and r2, r0, #0xff0000 @ finally it might be\r
381 cmp r2, #0xa00000 @ z80 area\r
382 bne m_read8_misc3\r
383 tst r0, #0x4000\r
bf537655 384 beq z80Read8 @ z80 RAM\r
e5503e2f 385 and r2, r0, #0x6000\r
386 cmp r2, #0x4000\r
387 mvnne r0, #0\r
388 bxne lr @ invalid\r
389.if EXTERNAL_YM2612\r
390 ldr r1, =PicoOpt\r
391 ldr r1, [r1]\r
392 tst r1, #1\r
393 beq m_read8_fake_ym2612\r
394 tst r1, #0x200\r
bf537655 395 beq YM2612Read_\r
396 b YM2612Read_940\r
e5503e2f 397.else\r
bf537655 398 b YM2612Read_\r
e5503e2f 399.endif\r
e5503e2f 400\r
401m_read8_fake_ym2612:\r
402 ldr r3, =(Pico+0x22200)\r
403 ldrb r0, [r3, #8] @ Pico.m.rotate\r
404 add r1, r0, #1\r
405 strb r1, [r3, #8]\r
406 and r0, r0, #3\r
407 bx lr\r
408\r
409m_read8_misc3:\r
410 @ if everything else fails, use generic handler\r
cc68a136 411 stmfd sp!,{r0,lr}\r
412 bic r0, r0, #1\r
413 mov r1, #8\r
414 bl OtherRead16\r
415 ldmfd sp!,{r1,lr}\r
416 tst r1, #1\r
417 moveq r0, r0, lsr #8\r
418 bx lr\r
419\r
e5503e2f 420\r
cc68a136 421m_read8_vdp:\r
422 tst r0, #0x70000\r
423 tsteq r0, #0x000e0\r
424 bxne lr @ invalid read\r
425 stmfd sp!,{r0,lr}\r
426 bic r0, r0, #1\r
427 bl PicoVideoRead\r
428 ldmfd sp!,{r1,lr}\r
429 tst r1, #1\r
430 moveq r0, r0, lsr #8\r
431 bx lr\r
432\r
433m_read8_ram:\r
434 ldr r1, =Pico\r
435 bic r0, r0, #0xff0000\r
436 eor r0, r0, #1\r
437 ldrb r0, [r1, r0]\r
438 bx lr\r
439\r
440m_read8_above_rom:\r
1dceadae 441 @ might still be SRam (Micro Machines, HardBall '95)\r
442 ldr r2, =(SRam)\r
443 ldr r3, =(Pico+0x22200)\r
444 ldr r1, [r2, #8] @ SRam.end\r
445 cmp r0, r1\r
446 bgt m_read8_ar_nosram\r
447 ldr r1, [r2, #4] @ SRam.start\r
448 cmp r0, r1\r
449 blt m_read8_ar_nosram\r
450 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
451 tst r1, #5\r
452 bne SRAMRead\r
453m_read8_ar_nosram:\r
cc68a136 454 stmfd sp!,{r0,lr}\r
455 bic r0, r0, #1\r
456 mov r1, #8\r
66fdc0f0 457 bl OtherRead16End\r
cc68a136 458 ldmfd sp!,{r1,lr}\r
459 tst r1, #1\r
460 moveq r0, r0, lsr #8\r
461 bx lr\r
462\r
463.pool\r
464\r
465@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
466\r
467.macro m_read16_rom sect\r
468 ldr r1, =(Pico+0x22200)\r
469 bic r0, r0, #0xf80000\r
470 ldr r1, [r1]\r
471 bic r0, r0, #1\r
472.if \sect\r
473 orr r0, r0, #0x080000*\sect\r
474.endif\r
475 ldrh r0, [r1, r0]\r
476 bx lr\r
477.endm\r
478\r
479\r
480m_read16_rom0: @ 0x000000 - 0x07ffff\r
481 m_read16_rom 0\r
482\r
483m_read16_rom1: @ 0x080000 - 0x0fffff\r
484 m_read16_rom 1\r
485\r
486m_read16_rom2: @ 0x100000 - 0x17ffff\r
487 m_read16_rom 2\r
488\r
489m_read16_rom3: @ 0x180000 - 0x1fffff\r
490 m_read16_rom 3\r
491\r
492m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r
493 ldr r2, =(SRam)\r
494 ldr r3, =(Pico+0x22200)\r
495 ldr r1, [r2, #8] @ SRam.end\r
496 bic r0, r0, #0xf80000\r
497 bic r0, r0, #1\r
498 orr r0, r0, #0x200000\r
499 cmp r0, r1\r
500 bgt m_read16_nosram\r
7969166e 501 ldr r1, [r2, #4] @ SRam.start\r
cc68a136 502 cmp r0, r1\r
503 blt m_read16_nosram\r
7969166e 504 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
505 tst r1, #5\r
506 beq m_read16_nosram\r
507 stmfd sp!,{lr}\r
508 bl SRAMRead\r
509 orr r0, r0, r0, lsl #8\r
510 ldmfd sp!,{pc}\r
cc68a136 511m_read16_nosram:\r
7969166e 512 ldr r1, [r3, #4] @ romsize\r
cc68a136 513 cmp r0, r1\r
514 movgt r0, #0\r
515 bxgt lr @ bad location\r
516 ldr r1, [r3] @ 1ci\r
517 ldrh r0, [r1, r0]\r
518 bx lr\r
519\r
520m_read16_rom5: @ 0x280000 - 0x2fffff\r
521 m_read16_rom 5\r
522\r
523m_read16_rom6: @ 0x300000 - 0x37ffff\r
524 m_read16_rom 6\r
525\r
526m_read16_rom7: @ 0x380000 - 0x3fffff\r
527 m_read16_rom 7\r
528\r
529m_read16_rom8: @ 0x400000 - 0x47ffff\r
530 m_read16_rom 8\r
531\r
532m_read16_rom9: @ 0x480000 - 0x4fffff\r
533 m_read16_rom 9\r
534\r
cc68a136 535m_read16_romA: @ 0x500000 - 0x57ffff\r
536 m_read16_rom 0xA\r
537\r
538m_read16_romB: @ 0x580000 - 0x5fffff\r
539 m_read16_rom 0xB\r
540\r
541m_read16_romC: @ 0x600000 - 0x67ffff\r
542 m_read16_rom 0xC\r
543\r
544m_read16_romD: @ 0x680000 - 0x6fffff\r
545 m_read16_rom 0xD\r
546\r
547m_read16_romE: @ 0x700000 - 0x77ffff\r
548 m_read16_rom 0xE\r
549\r
550m_read16_romF: @ 0x780000 - 0x7fffff\r
551 m_read16_rom 0xF\r
552\r
29a95187 553m_read16_rom10: @ 0x800000 - 0x87ffff\r
554 m_read16_rom 0x10\r
555\r
556m_read16_rom11: @ 0x880000 - 0x8fffff\r
557 m_read16_rom 0x11\r
558\r
559m_read16_rom12: @ 0x900000 - 0x97ffff\r
560 m_read16_rom 0x12\r
561\r
562m_read16_rom13: @ 0x980000 - 0x9fffff\r
563 m_read16_rom 0x13\r
564\r
cc68a136 565m_read16_misc:\r
cc68a136 566 bic r0, r0, #1\r
4ff2d527 567 mov r1, #16\r
568 b OtherRead16\r
cc68a136 569\r
570m_read16_vdp:\r
7969166e 571 tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r
cc68a136 572 tsteq r0, #0x000e0\r
573 bxne lr @ invalid read\r
cc68a136 574 bic r0, r0, #1\r
4ff2d527 575 b PicoVideoRead\r
cc68a136 576\r
577m_read16_ram:\r
578 ldr r1, =Pico\r
579 bic r0, r0, #0xff0000\r
580 bic r0, r0, #1\r
581 ldrh r0, [r1, r0]\r
582 bx lr\r
583\r
584m_read16_above_rom:\r
1dceadae 585 @ might still be SRam\r
586 ldr r2, =(SRam)\r
587 ldr r3, =(Pico+0x22200)\r
588 ldr r1, [r2, #8] @ SRam.end\r
cc68a136 589 bic r0, r0, #1\r
1dceadae 590 cmp r0, r1\r
591 bgt m_read16_ar_nosram\r
592 ldr r1, [r2, #4] @ SRam.start\r
593 cmp r0, r1\r
594 blt m_read16_ar_nosram\r
595 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
596 tst r1, #5\r
597 beq m_read16_ar_nosram\r
598 stmfd sp!,{lr}\r
599 bl SRAMRead\r
600 orr r0, r0, r0, lsl #8\r
601 ldmfd sp!,{pc}\r
602m_read16_ar_nosram:\r
4ff2d527 603 mov r1, #16\r
604 b OtherRead16End\r
cc68a136 605\r
606.pool\r
607\r
608@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
609\r
610.macro m_read32_rom sect\r
611 ldr r1, =(Pico+0x22200)\r
612 bic r0, r0, #0xf80000\r
613 ldr r1, [r1]\r
614 bic r0, r0, #1\r
615.if \sect\r
616 orr r0, r0, #0x080000*\sect\r
617.endif\r
618 ldrh r0, [r1, r0]!\r
619 ldrh r1, [r1, #2] @ 1ci\r
620 orr r0, r1, r0, lsl #16\r
621 bx lr\r
622.endm\r
623\r
624\r
625m_read32_rom0: @ 0x000000 - 0x07ffff\r
626 m_read32_rom 0\r
627\r
628m_read32_rom1: @ 0x080000 - 0x0fffff\r
629 m_read32_rom 1\r
630\r
631m_read32_rom2: @ 0x100000 - 0x17ffff\r
632 m_read32_rom 2\r
633\r
634m_read32_rom3: @ 0x180000 - 0x1fffff\r
635 m_read32_rom 3\r
636\r
637m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r
638 ldr r2, =(SRam)\r
639 ldr r3, =(Pico+0x22200)\r
640 ldr r1, [r2, #8] @ SRam.end\r
641 bic r0, r0, #0xf80000\r
642 bic r0, r0, #1\r
643 orr r0, r0, #0x200000\r
644 cmp r0, r1\r
645 bgt m_read32_nosram\r
7969166e 646 ldr r1, [r2, #4] @ SRam.start\r
cc68a136 647 cmp r0, r1\r
648 blt m_read32_nosram\r
7969166e 649 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r
650 tst r1, #5\r
651 beq m_read32_nosram\r
652 stmfd sp!,{r0,lr}\r
653 bl SRAMRead\r
654 ldmfd sp!,{r1,lr}\r
655 stmfd sp!,{r0,lr}\r
656 add r0, r1, #2\r
657 bl SRAMRead\r
658 ldmfd sp!,{r1,lr}\r
3ec29f01 659 orr r0, r0, r1, lsl #16\r
7969166e 660 orr r0, r0, r0, lsl #8\r
cc68a136 661 bx lr\r
662m_read32_nosram:\r
7969166e 663 ldr r1, [r3, #4] @ romsize\r
cc68a136 664 cmp r0, r1\r
665 movgt r0, #0\r
666 bxgt lr @ bad location\r
667 ldr r1, [r3] @ (1ci)\r
668 ldrh r0, [r1, r0]!\r
669 ldrh r1, [r1, #2] @ (2ci)\r
670 orr r0, r1, r0, lsl #16\r
671 bx lr\r
672\r
673m_read32_rom5: @ 0x280000 - 0x2fffff\r
674 m_read32_rom 5\r
675\r
676m_read32_rom6: @ 0x300000 - 0x37ffff\r
677 m_read32_rom 6\r
678\r
679m_read32_rom7: @ 0x380000 - 0x3fffff\r
680 m_read32_rom 7\r
681\r
682m_read32_rom8: @ 0x400000 - 0x47ffff\r
683 m_read32_rom 8\r
684\r
685m_read32_rom9: @ 0x480000 - 0x4fffff\r
686 m_read32_rom 9\r
687\r
cc68a136 688m_read32_romA: @ 0x500000 - 0x57ffff\r
689 m_read32_rom 0xA\r
690\r
691m_read32_romB: @ 0x580000 - 0x5fffff\r
692 m_read32_rom 0xB\r
693\r
694m_read32_romC: @ 0x600000 - 0x67ffff\r
695 m_read32_rom 0xC\r
696\r
697m_read32_romD: @ 0x680000 - 0x6fffff\r
698 m_read32_rom 0xD\r
699\r
700m_read32_romE: @ 0x700000 - 0x77ffff\r
701 m_read32_rom 0xE\r
702\r
703m_read32_romF: @ 0x780000 - 0x7fffff\r
704 m_read32_rom 0xF\r
705\r
29a95187 706m_read32_rom10: @ 0x800000 - 0x87ffff\r
707 m_read32_rom 0x10\r
708\r
709m_read32_rom11: @ 0x880000 - 0x8fffff\r
710 m_read32_rom 0x11\r
711\r
712m_read32_rom12: @ 0x900000 - 0x97ffff\r
713 m_read32_rom 0x12\r
714\r
715m_read32_rom13: @ 0x980000 - 0x9fffff\r
716 m_read32_rom 0x13\r
717\r
cc68a136 718m_read32_misc:\r
719 bic r0, r0, #1\r
720 stmfd sp!,{r0,lr}\r
721 mov r1, #32\r
722 bl OtherRead16\r
723 mov r1, r0\r
724 ldmfd sp!,{r0}\r
725 stmfd sp!,{r1}\r
726 add r0, r0, #2\r
727 mov r1, #32\r
728 bl OtherRead16\r
729 ldmfd sp!,{r1,lr}\r
730 orr r0, r0, r1, lsl #16\r
731 bx lr\r
732\r
733m_read32_vdp:\r
734 tst r0, #0x70000\r
735 tsteq r0, #0x000e0\r
736 bxne lr @ invalid read\r
737 bic r0, r0, #1\r
4ff2d527 738 add r1, r0, #2\r
739 stmfd sp!,{r1,lr}\r
cc68a136 740 bl PicoVideoRead\r
4ff2d527 741 swp r0, r0, [sp]\r
cc68a136 742 bl PicoVideoRead\r
743 ldmfd sp!,{r1,lr}\r
744 orr r0, r0, r1, lsl #16\r
745 bx lr\r
746\r
747m_read32_ram:\r
748 ldr r1, =Pico\r
749 bic r0, r0, #0xff0000\r
750 bic r0, r0, #1\r
751 ldrh r0, [r1, r0]!\r
752 ldrh r1, [r1, #2] @ 2ci\r
753 orr r0, r1, r0, lsl #16\r
754 bx lr\r
755\r
756m_read32_above_rom:\r
757 bic r0, r0, #1\r
758 stmfd sp!,{r0,lr}\r
759 mov r1, #32\r
66fdc0f0 760 bl OtherRead16End\r
cc68a136 761 mov r1, r0\r
762 ldmfd sp!,{r0}\r
763 stmfd sp!,{r1}\r
764 add r0, r0, #2\r
765 mov r1, #32\r
66fdc0f0 766 bl OtherRead16End\r
cc68a136 767 ldmfd sp!,{r1,lr}\r
768 orr r0, r0, r1, lsl #16\r
769 bx lr\r
770\r
771.pool\r
772\r
773@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
774\r
775PicoWriteRomHW_SSF2: @ u32 a, u32 d\r
776 and r0, r0, #0xe\r
777 movs r0, r0, lsr #1\r
778 bne pwr_banking\r
779\r
780 @ sram register\r
781 ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r
721cd396 782 ldrb r0, [r2]\r
cc68a136 783 and r1, r1, #3\r
721cd396 784 bic r0, r0, #3\r
785 orr r0, r0, r1\r
786 strb r0, [r2]\r
cc68a136 787 bx lr\r
788\r
789pwr_banking:\r
790 and r1, r1, #0x1f\r
791\r
792 ldr r3, =m_read8_def_table\r
793 ldr r2, =m_read8_table\r
794 ldr r12, [r3, r1, lsl #2]\r
795 str r12, [r2, r0, lsl #2]\r
796\r
797 ldr r3, =m_read16_def_table\r
798 ldr r2, =m_read16_table\r
799 ldr r12, [r3, r1, lsl #2]\r
800 str r12, [r2, r0, lsl #2]\r
801\r
802 ldr r3, =m_read32_def_table\r
803 ldr r2, =m_read32_table\r
804 ldr r12, [r3, r1, lsl #2]\r
805 str r12, [r2, r0, lsl #2]\r
806 \r
807 bx lr\r
721cd396 808\r
e5503e2f 809@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
810\r
811@ Here we only handle most often used locations,\r
812@ everything else is passed to generic handlers\r
813\r
814PicoWrite8: @ u32 a, u8 d\r
815 bic r0, r0, #0xff000000\r
816 and r2, r0, #0x00e00000\r
817 cmp r2, #0x00e00000 @ RAM?\r
818 ldr r3, =Pico\r
819 biceq r0, r0, #0x00ff0000\r
820 eoreq r0, r0, #1\r
821 streqb r1, [r3, r0]\r
822 bxeq lr\r
823\r
824m_m68k_write8_misc:\r
825 bic r2, r0, #0x1f @ most commonly we get i/o port write,\r
826 cmp r2, #0xa10000 @ so check for it first\r
827 bne m_write8_misc2\r
828m_write8_io:\r
829 ldr r2, =PicoOpt\r
830 and r0, r0, #0x1e\r
831 ldr r2, [r2]\r
832 ldr r3, =(Pico+0x22000) @ Pico.ioports\r
833 tst r2, #0x20 @ 6 button pad?\r
834 streqb r1, [r3, r0, lsr #1]\r
835 bxeq lr\r
836 cmp r0, #2\r
837 cmpne r0, #4\r
838 bne m_write8_io_done @ not likely to happen\r
839 add r2, r3, #0x200 @ Pico+0x22200\r
840 mov r12,#0\r
841 cmp r0, #2\r
842 streqb r12,[r2,#0x18]\r
843 strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r
844 tst r1, #0x40 @ TH\r
845 beq m_write8_io_done\r
846 ldrb r12,[r3, r0, lsr #1]\r
847 tst r12,#0x40\r
848 bne m_write8_io_done\r
849 cmp r0, #2\r
850 ldreqb r12,[r2,#0x0a]\r
851 ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r
852 add r12,r12,#1\r
853 streqb r12,[r2,#0x0a]\r
854 strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r
855m_write8_io_done:\r
856 strb r1, [r3, r0, lsr #1]\r
857 bx lr\r
858\r
859\r
860m_write8_misc2:\r
861 and r2, r0, #0xff0000\r
862 cmp r2, #0xa00000 @ z80 area?\r
863 bne m_write8_not_z80\r
864 tst r0, #0x4000\r
865 bne m_write8_z80_not_ram\r
866 ldr r3, =(Pico+0x20000) @ Pico.zram\r
867 add r2, r3, #0x02200 @ Pico+0x22200\r
868 ldrb r2, [r2, #9] @ Pico.m.z80Run\r
869 bic r0, r0, #0xff0000\r
870 bic r0, r0, #0x00e000\r
871 tst r2, #1\r
872 streqb r1, [r3, r0] @ zram\r
873 bx lr\r
874\r
875m_write8_z80_not_ram:\r
876 and r2, r0, #0x6000\r
877 cmp r2, #0x4000\r
878 bne m_write8_z80_not_ym2612\r
879 ldr r2, =PicoOpt\r
880 and r0, r0, #3\r
881 ldr r2, [r2]\r
882 tst r2, #1\r
883 bxeq lr\r
884 stmfd sp!,{lr}\r
885.if EXTERNAL_YM2612\r
886 tst r2, #0x200\r
887 ldreq r2, =YM2612Write_\r
888 ldrne r2, =YM2612Write_940\r
889 mov lr, pc\r
890 bx r2\r
891.else\r
892 bl YM2612Write_\r
893.endif\r
894 ldr r2, =emustatus\r
895 ldmfd sp!,{lr}\r
896 ldr r1, [r2]\r
471484e4 897 and r0, r0, #1\r
898 orr r1, r0, r1\r
e5503e2f 899 str r1, [r2] @ emustatus|=YM2612Write(a&3, d);\r
900 bx lr\r
901\r
902m_write8_z80_not_ym2612: @ not too likely\r
903 mov r2, r0, lsl #17\r
904 bic r2, r2, #6<<17\r
905 mov r3, #0x7f00\r
906 orr r3, r3, #0x0011\r
907 cmp r3, r2, lsr #17 @ psg @ z80 area?\r
908 beq m_write8_psg\r
909 and r2, r0, #0x7f00\r
910 cmp r2, #0x6000 @ bank register?\r
911 bxne lr @ invalid write\r
912\r
913m_write8_z80_bank_reg:\r
914 ldr r3, =(Pico+0x22208) @ Pico.m\r
915 ldrh r2, [r3, #0x0a]\r
916 mov r1, r1, lsr #8\r
917 orr r2, r1, r2, lsr #1\r
918 bic r2, r2, #0xfe00\r
919 strh r2, [r3, #0x0a]\r
920 bx lr\r
921\r
922\r
923m_write8_not_z80:\r
924 and r2, r0, #0xe70000\r
925 cmp r2, #0xc00000 @ VDP area?\r
bf537655 926 bne OtherWrite8 @ passthrough\r
e5503e2f 927 and r2, r0, #0xf9\r
928 cmp r2, #0x11\r
bf537655 929 bne OtherWrite8\r
e5503e2f 930m_write8_psg:\r
931 ldr r2, =PicoOpt\r
932 mov r0, r1\r
933 ldr r2, [r2]\r
934 tst r2, #2\r
935 bxeq lr\r
bf537655 936 b SN76496Write\r
e5503e2f 937\r
fast MegaDrive/MegaCD/32X emulator