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 |
16 | m_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 |
7969166e |
43 | .long m_read8_vdp @ 0xD00000 - 0xD7FFFF\r |
44 | .long m_read8_vdp @ 0xD80000 - 0xDFFFFF\r |
cc68a136 |
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 |
50 | m_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 |
7969166e |
76 | .long m_read16_vdp @ 0xC80000 - 0xCFFFFF\r |
77 | .long m_read16_vdp @ 0xD00000 - 0xD7FFFF\r |
78 | .long m_read16_vdp @ 0xD80000 - 0xDFFFFF\r |
cc68a136 |
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 |
84 | m_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 |
7969166e |
110 | .long m_read32_vdp @ 0xC80000 - 0xCFFFFF\r |
111 | .long m_read32_vdp @ 0xD00000 - 0xD7FFFF\r |
112 | .long m_read32_vdp @ 0xD80000 - 0xDFFFFF\r |
cc68a136 |
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 |
126 | m_read8_table:\r |
127 | .skip 32*4\r |
128 | \r |
129 | m_read16_table:\r |
130 | .skip 32*4\r |
131 | \r |
132 | m_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 |
150 | PicoMemReset:\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 |
160 | 1:\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 |
169 | 1:\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 |
178 | 1:\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 |
188 | 1:\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 |
196 | 2:\r |
197 | ldr r1, =m_read16_above_rom\r |
198 | ldr r0, =m_read16_table\r |
199 | mov r2, #16\r |
200 | 1:\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 |
208 | 2:\r |
209 | ldr r1, =m_read32_above_rom\r |
210 | ldr r0, =m_read32_table\r |
211 | mov r2, #16\r |
212 | 1:\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 |
220 | 2:\r |
221 | bx lr\r |
222 | \r |
223 | .pool\r |
224 | \r |
225 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
226 | \r |
227 | PicoRead8: @ 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 |
233 | PicoRead16: @ 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 |
239 | PicoRead32: @ 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 |
249 | m_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 |
267 | m_read8_rom0: @ 0x000000 - 0x07ffff\r |
268 | m_read8_rom 0\r |
269 | \r |
270 | m_read8_rom1: @ 0x080000 - 0x0fffff\r |
271 | m_read8_rom 1\r |
272 | \r |
273 | m_read8_rom2: @ 0x100000 - 0x17ffff\r |
274 | m_read8_rom 2\r |
275 | \r |
276 | m_read8_rom3: @ 0x180000 - 0x1fffff\r |
277 | m_read8_rom 3\r |
278 | \r |
279 | m_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 |
7969166e |
287 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
288 | cmp r0, r1\r |
289 | blt m_read8_nosram\r |
7969166e |
290 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
291 | tst r1, #5\r |
292 | bne SRAMRead\r |
cc68a136 |
293 | m_read8_nosram:\r |
7969166e |
294 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
295 | cmp r0, r1\r |
296 | movgt r0, #0\r |
297 | bxgt lr @ bad location\r |
298 | ldr r1, [r3]\r |
299 | eor r0, r0, #1\r |
300 | ldrb r0, [r1, r0]\r |
301 | bx lr\r |
302 | \r |
303 | m_read8_rom5: @ 0x280000 - 0x2fffff\r |
304 | m_read8_rom 5\r |
305 | \r |
306 | m_read8_rom6: @ 0x300000 - 0x37ffff\r |
307 | m_read8_rom 6\r |
308 | \r |
309 | m_read8_rom7: @ 0x380000 - 0x3fffff\r |
310 | m_read8_rom 7\r |
311 | \r |
312 | m_read8_rom8: @ 0x400000 - 0x47ffff\r |
313 | m_read8_rom 8\r |
314 | \r |
315 | m_read8_rom9: @ 0x480000 - 0x4fffff\r |
316 | m_read8_rom 9\r |
317 | \r |
cc68a136 |
318 | m_read8_romA: @ 0x500000 - 0x57ffff\r |
319 | m_read8_rom 0xA\r |
320 | \r |
321 | m_read8_romB: @ 0x580000 - 0x5fffff\r |
322 | m_read8_rom 0xB\r |
323 | \r |
324 | m_read8_romC: @ 0x600000 - 0x67ffff\r |
325 | m_read8_rom 0xC\r |
326 | \r |
327 | m_read8_romD: @ 0x680000 - 0x6fffff\r |
328 | m_read8_rom 0xD\r |
329 | \r |
330 | m_read8_romE: @ 0x700000 - 0x77ffff\r |
331 | m_read8_rom 0xE\r |
332 | \r |
333 | m_read8_romF: @ 0x780000 - 0x7fffff\r |
334 | m_read8_rom 0xF\r |
335 | \r |
29a95187 |
336 | m_read8_rom10: @ 0x800000 - 0x87ffff\r |
337 | m_read8_rom 0x10\r |
338 | \r |
339 | m_read8_rom11: @ 0x880000 - 0x8fffff\r |
340 | m_read8_rom 0x11\r |
341 | \r |
342 | m_read8_rom12: @ 0x900000 - 0x97ffff\r |
343 | m_read8_rom 0x12\r |
344 | \r |
345 | m_read8_rom13: @ 0x980000 - 0x9fffff\r |
346 | m_read8_rom 0x13\r |
347 | \r |
e5503e2f |
348 | \r |
349 | m_m68k_read8_misc:\r |
cc68a136 |
350 | m_read8_misc:\r |
e5503e2f |
351 | bic r2, r0, #0x001f @ most commonly we get i/o port read,\r |
352 | cmp r2, #0xa10000 @ so check for it first\r |
353 | bne m_read8_misc2\r |
354 | m_read8_misc_io:\r |
355 | ands r0, r0, #0x1e\r |
356 | beq m_read8_misc_hwreg\r |
357 | cmp r0, #4\r |
e5503e2f |
358 | movlt r0, #0\r |
359 | moveq r0, #1\r |
bf537655 |
360 | ble PadRead\r |
e5503e2f |
361 | ldr r3, =(Pico+0x22000)\r |
362 | mov r0, r0, lsr #1 @ other IO ports (Pico.ioports[a])\r |
363 | ldrb r0, [r3, r0]\r |
364 | bx lr\r |
365 | \r |
366 | m_read8_misc_hwreg:\r |
367 | ldr r3, =(Pico+0x22200)\r |
368 | ldrb r0, [r3, #0x0f] @ Pico.m.hardware\r |
369 | bx lr\r |
370 | \r |
371 | m_read8_misc2:\r |
372 | mov r2, #0xa10000 @ games also like to poll busreq,\r |
373 | orr r2, r2, #0x001100 @ so we'll try it now\r |
374 | cmp r0, r2\r |
bf537655 |
375 | beq z80ReadBusReq\r |
e5503e2f |
376 | \r |
377 | and r2, r0, #0xff0000 @ finally it might be\r |
378 | cmp r2, #0xa00000 @ z80 area\r |
379 | bne m_read8_misc3\r |
380 | tst r0, #0x4000\r |
bf537655 |
381 | beq z80Read8 @ z80 RAM\r |
e5503e2f |
382 | and r2, r0, #0x6000\r |
383 | cmp r2, #0x4000\r |
384 | mvnne r0, #0\r |
385 | bxne lr @ invalid\r |
386 | .if EXTERNAL_YM2612\r |
387 | ldr r1, =PicoOpt\r |
388 | ldr r1, [r1]\r |
389 | tst r1, #1\r |
390 | beq m_read8_fake_ym2612\r |
391 | tst r1, #0x200\r |
bf537655 |
392 | beq YM2612Read_\r |
393 | b YM2612Read_940\r |
e5503e2f |
394 | .else\r |
bf537655 |
395 | b YM2612Read_\r |
e5503e2f |
396 | .endif\r |
e5503e2f |
397 | \r |
398 | m_read8_fake_ym2612:\r |
399 | ldr r3, =(Pico+0x22200)\r |
400 | ldrb r0, [r3, #8] @ Pico.m.rotate\r |
401 | add r1, r0, #1\r |
402 | strb r1, [r3, #8]\r |
403 | and r0, r0, #3\r |
404 | bx lr\r |
405 | \r |
406 | m_read8_misc3:\r |
407 | @ if everything else fails, use generic handler\r |
cc68a136 |
408 | stmfd sp!,{r0,lr}\r |
409 | bic r0, r0, #1\r |
410 | mov r1, #8\r |
411 | bl OtherRead16\r |
412 | ldmfd sp!,{r1,lr}\r |
413 | tst r1, #1\r |
414 | moveq r0, r0, lsr #8\r |
415 | bx lr\r |
416 | \r |
e5503e2f |
417 | \r |
cc68a136 |
418 | m_read8_vdp:\r |
419 | tst r0, #0x70000\r |
420 | tsteq r0, #0x000e0\r |
421 | bxne lr @ invalid read\r |
422 | stmfd sp!,{r0,lr}\r |
423 | bic r0, r0, #1\r |
424 | bl PicoVideoRead\r |
425 | ldmfd sp!,{r1,lr}\r |
426 | tst r1, #1\r |
427 | moveq r0, r0, lsr #8\r |
428 | bx lr\r |
429 | \r |
430 | m_read8_ram:\r |
431 | ldr r1, =Pico\r |
432 | bic r0, r0, #0xff0000\r |
433 | eor r0, r0, #1\r |
434 | ldrb r0, [r1, r0]\r |
435 | bx lr\r |
436 | \r |
437 | m_read8_above_rom:\r |
1dceadae |
438 | @ might still be SRam (Micro Machines, HardBall '95)\r |
439 | ldr r2, =(SRam)\r |
440 | ldr r3, =(Pico+0x22200)\r |
441 | ldr r1, [r2, #8] @ SRam.end\r |
442 | cmp r0, r1\r |
443 | bgt m_read8_ar_nosram\r |
444 | ldr r1, [r2, #4] @ SRam.start\r |
445 | cmp r0, r1\r |
446 | blt m_read8_ar_nosram\r |
447 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
448 | tst r1, #5\r |
449 | bne SRAMRead\r |
450 | m_read8_ar_nosram:\r |
cc68a136 |
451 | stmfd sp!,{r0,lr}\r |
452 | bic r0, r0, #1\r |
453 | mov r1, #8\r |
66fdc0f0 |
454 | bl OtherRead16End\r |
cc68a136 |
455 | ldmfd sp!,{r1,lr}\r |
456 | tst r1, #1\r |
457 | moveq r0, r0, lsr #8\r |
458 | bx lr\r |
459 | \r |
460 | .pool\r |
461 | \r |
462 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
463 | \r |
464 | .macro m_read16_rom sect\r |
465 | ldr r1, =(Pico+0x22200)\r |
466 | bic r0, r0, #0xf80000\r |
467 | ldr r1, [r1]\r |
468 | bic r0, r0, #1\r |
469 | .if \sect\r |
470 | orr r0, r0, #0x080000*\sect\r |
471 | .endif\r |
472 | ldrh r0, [r1, r0]\r |
473 | bx lr\r |
474 | .endm\r |
475 | \r |
476 | \r |
477 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
478 | m_read16_rom 0\r |
479 | \r |
480 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
481 | m_read16_rom 1\r |
482 | \r |
483 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
484 | m_read16_rom 2\r |
485 | \r |
486 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
487 | m_read16_rom 3\r |
488 | \r |
489 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
490 | ldr r2, =(SRam)\r |
491 | ldr r3, =(Pico+0x22200)\r |
492 | ldr r1, [r2, #8] @ SRam.end\r |
493 | bic r0, r0, #0xf80000\r |
494 | bic r0, r0, #1\r |
495 | orr r0, r0, #0x200000\r |
496 | cmp r0, r1\r |
497 | bgt m_read16_nosram\r |
7969166e |
498 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
499 | cmp r0, r1\r |
500 | blt m_read16_nosram\r |
7969166e |
501 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
502 | tst r1, #5\r |
503 | beq m_read16_nosram\r |
504 | stmfd sp!,{lr}\r |
505 | bl SRAMRead\r |
506 | orr r0, r0, r0, lsl #8\r |
507 | ldmfd sp!,{pc}\r |
cc68a136 |
508 | m_read16_nosram:\r |
7969166e |
509 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
510 | cmp r0, r1\r |
511 | movgt r0, #0\r |
512 | bxgt lr @ bad location\r |
513 | ldr r1, [r3] @ 1ci\r |
514 | ldrh r0, [r1, r0]\r |
515 | bx lr\r |
516 | \r |
517 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
518 | m_read16_rom 5\r |
519 | \r |
520 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
521 | m_read16_rom 6\r |
522 | \r |
523 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
524 | m_read16_rom 7\r |
525 | \r |
526 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
527 | m_read16_rom 8\r |
528 | \r |
529 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
530 | m_read16_rom 9\r |
531 | \r |
cc68a136 |
532 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
533 | m_read16_rom 0xA\r |
534 | \r |
535 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
536 | m_read16_rom 0xB\r |
537 | \r |
538 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
539 | m_read16_rom 0xC\r |
540 | \r |
541 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
542 | m_read16_rom 0xD\r |
543 | \r |
544 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
545 | m_read16_rom 0xE\r |
546 | \r |
547 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
548 | m_read16_rom 0xF\r |
549 | \r |
29a95187 |
550 | m_read16_rom10: @ 0x800000 - 0x87ffff\r |
551 | m_read16_rom 0x10\r |
552 | \r |
553 | m_read16_rom11: @ 0x880000 - 0x8fffff\r |
554 | m_read16_rom 0x11\r |
555 | \r |
556 | m_read16_rom12: @ 0x900000 - 0x97ffff\r |
557 | m_read16_rom 0x12\r |
558 | \r |
559 | m_read16_rom13: @ 0x980000 - 0x9fffff\r |
560 | m_read16_rom 0x13\r |
561 | \r |
cc68a136 |
562 | m_read16_misc:\r |
cc68a136 |
563 | bic r0, r0, #1\r |
4ff2d527 |
564 | mov r1, #16\r |
565 | b OtherRead16\r |
cc68a136 |
566 | \r |
567 | m_read16_vdp:\r |
7969166e |
568 | tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r |
cc68a136 |
569 | tsteq r0, #0x000e0\r |
570 | bxne lr @ invalid read\r |
cc68a136 |
571 | bic r0, r0, #1\r |
4ff2d527 |
572 | b PicoVideoRead\r |
cc68a136 |
573 | \r |
574 | m_read16_ram:\r |
575 | ldr r1, =Pico\r |
576 | bic r0, r0, #0xff0000\r |
577 | bic r0, r0, #1\r |
578 | ldrh r0, [r1, r0]\r |
579 | bx lr\r |
580 | \r |
581 | m_read16_above_rom:\r |
1dceadae |
582 | @ might still be SRam\r |
583 | ldr r2, =(SRam)\r |
584 | ldr r3, =(Pico+0x22200)\r |
585 | ldr r1, [r2, #8] @ SRam.end\r |
cc68a136 |
586 | bic r0, r0, #1\r |
1dceadae |
587 | cmp r0, r1\r |
588 | bgt m_read16_ar_nosram\r |
589 | ldr r1, [r2, #4] @ SRam.start\r |
590 | cmp r0, r1\r |
591 | blt m_read16_ar_nosram\r |
592 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
593 | tst r1, #5\r |
594 | beq m_read16_ar_nosram\r |
595 | stmfd sp!,{lr}\r |
596 | bl SRAMRead\r |
597 | orr r0, r0, r0, lsl #8\r |
598 | ldmfd sp!,{pc}\r |
599 | m_read16_ar_nosram:\r |
4ff2d527 |
600 | mov r1, #16\r |
601 | b OtherRead16End\r |
cc68a136 |
602 | \r |
603 | .pool\r |
604 | \r |
605 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
606 | \r |
607 | .macro m_read32_rom sect\r |
608 | ldr r1, =(Pico+0x22200)\r |
609 | bic r0, r0, #0xf80000\r |
610 | ldr r1, [r1]\r |
611 | bic r0, r0, #1\r |
612 | .if \sect\r |
613 | orr r0, r0, #0x080000*\sect\r |
614 | .endif\r |
615 | ldrh r0, [r1, r0]!\r |
616 | ldrh r1, [r1, #2] @ 1ci\r |
617 | orr r0, r1, r0, lsl #16\r |
618 | bx lr\r |
619 | .endm\r |
620 | \r |
621 | \r |
622 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
623 | m_read32_rom 0\r |
624 | \r |
625 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
626 | m_read32_rom 1\r |
627 | \r |
628 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
629 | m_read32_rom 2\r |
630 | \r |
631 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
632 | m_read32_rom 3\r |
633 | \r |
634 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
635 | ldr r2, =(SRam)\r |
636 | ldr r3, =(Pico+0x22200)\r |
637 | ldr r1, [r2, #8] @ SRam.end\r |
638 | bic r0, r0, #0xf80000\r |
639 | bic r0, r0, #1\r |
640 | orr r0, r0, #0x200000\r |
641 | cmp r0, r1\r |
642 | bgt m_read32_nosram\r |
7969166e |
643 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
644 | cmp r0, r1\r |
645 | blt m_read32_nosram\r |
7969166e |
646 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
647 | tst r1, #5\r |
648 | beq m_read32_nosram\r |
649 | stmfd sp!,{r0,lr}\r |
650 | bl SRAMRead\r |
651 | ldmfd sp!,{r1,lr}\r |
652 | stmfd sp!,{r0,lr}\r |
653 | add r0, r1, #2\r |
654 | bl SRAMRead\r |
655 | ldmfd sp!,{r1,lr}\r |
656 | orr r0, r1, r0, lsl #16\r |
657 | orr r0, r0, r0, lsl #8\r |
cc68a136 |
658 | bx lr\r |
659 | m_read32_nosram:\r |
7969166e |
660 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
661 | cmp r0, r1\r |
662 | movgt r0, #0\r |
663 | bxgt lr @ bad location\r |
664 | ldr r1, [r3] @ (1ci)\r |
665 | ldrh r0, [r1, r0]!\r |
666 | ldrh r1, [r1, #2] @ (2ci)\r |
667 | orr r0, r1, r0, lsl #16\r |
668 | bx lr\r |
669 | \r |
670 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
671 | m_read32_rom 5\r |
672 | \r |
673 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
674 | m_read32_rom 6\r |
675 | \r |
676 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
677 | m_read32_rom 7\r |
678 | \r |
679 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
680 | m_read32_rom 8\r |
681 | \r |
682 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
683 | m_read32_rom 9\r |
684 | \r |
cc68a136 |
685 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
686 | m_read32_rom 0xA\r |
687 | \r |
688 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
689 | m_read32_rom 0xB\r |
690 | \r |
691 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
692 | m_read32_rom 0xC\r |
693 | \r |
694 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
695 | m_read32_rom 0xD\r |
696 | \r |
697 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
698 | m_read32_rom 0xE\r |
699 | \r |
700 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
701 | m_read32_rom 0xF\r |
702 | \r |
29a95187 |
703 | m_read32_rom10: @ 0x800000 - 0x87ffff\r |
704 | m_read32_rom 0x10\r |
705 | \r |
706 | m_read32_rom11: @ 0x880000 - 0x8fffff\r |
707 | m_read32_rom 0x11\r |
708 | \r |
709 | m_read32_rom12: @ 0x900000 - 0x97ffff\r |
710 | m_read32_rom 0x12\r |
711 | \r |
712 | m_read32_rom13: @ 0x980000 - 0x9fffff\r |
713 | m_read32_rom 0x13\r |
714 | \r |
cc68a136 |
715 | m_read32_misc:\r |
716 | bic r0, r0, #1\r |
717 | stmfd sp!,{r0,lr}\r |
718 | mov r1, #32\r |
719 | bl OtherRead16\r |
720 | mov r1, r0\r |
721 | ldmfd sp!,{r0}\r |
722 | stmfd sp!,{r1}\r |
723 | add r0, r0, #2\r |
724 | mov r1, #32\r |
725 | bl OtherRead16\r |
726 | ldmfd sp!,{r1,lr}\r |
727 | orr r0, r0, r1, lsl #16\r |
728 | bx lr\r |
729 | \r |
730 | m_read32_vdp:\r |
731 | tst r0, #0x70000\r |
732 | tsteq r0, #0x000e0\r |
733 | bxne lr @ invalid read\r |
734 | bic r0, r0, #1\r |
4ff2d527 |
735 | add r1, r0, #2\r |
736 | stmfd sp!,{r1,lr}\r |
cc68a136 |
737 | bl PicoVideoRead\r |
4ff2d527 |
738 | swp r0, r0, [sp]\r |
cc68a136 |
739 | bl PicoVideoRead\r |
740 | ldmfd sp!,{r1,lr}\r |
741 | orr r0, r0, r1, lsl #16\r |
742 | bx lr\r |
743 | \r |
744 | m_read32_ram:\r |
745 | ldr r1, =Pico\r |
746 | bic r0, r0, #0xff0000\r |
747 | bic r0, r0, #1\r |
748 | ldrh r0, [r1, r0]!\r |
749 | ldrh r1, [r1, #2] @ 2ci\r |
750 | orr r0, r1, r0, lsl #16\r |
751 | bx lr\r |
752 | \r |
753 | m_read32_above_rom:\r |
754 | bic r0, r0, #1\r |
755 | stmfd sp!,{r0,lr}\r |
756 | mov r1, #32\r |
66fdc0f0 |
757 | bl OtherRead16End\r |
cc68a136 |
758 | mov r1, r0\r |
759 | ldmfd sp!,{r0}\r |
760 | stmfd sp!,{r1}\r |
761 | add r0, r0, #2\r |
762 | mov r1, #32\r |
66fdc0f0 |
763 | bl OtherRead16End\r |
cc68a136 |
764 | ldmfd sp!,{r1,lr}\r |
765 | orr r0, r0, r1, lsl #16\r |
766 | bx lr\r |
767 | \r |
768 | .pool\r |
769 | \r |
770 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
771 | \r |
772 | PicoWriteRomHW_SSF2: @ u32 a, u32 d\r |
773 | and r0, r0, #0xe\r |
774 | movs r0, r0, lsr #1\r |
775 | bne pwr_banking\r |
776 | \r |
777 | @ sram register\r |
778 | ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r |
721cd396 |
779 | ldrb r0, [r2]\r |
cc68a136 |
780 | and r1, r1, #3\r |
721cd396 |
781 | bic r0, r0, #3\r |
782 | orr r0, r0, r1\r |
783 | strb r0, [r2]\r |
cc68a136 |
784 | bx lr\r |
785 | \r |
786 | pwr_banking:\r |
787 | and r1, r1, #0x1f\r |
788 | \r |
789 | ldr r3, =m_read8_def_table\r |
790 | ldr r2, =m_read8_table\r |
791 | ldr r12, [r3, r1, lsl #2]\r |
792 | str r12, [r2, r0, lsl #2]\r |
793 | \r |
794 | ldr r3, =m_read16_def_table\r |
795 | ldr r2, =m_read16_table\r |
796 | ldr r12, [r3, r1, lsl #2]\r |
797 | str r12, [r2, r0, lsl #2]\r |
798 | \r |
799 | ldr r3, =m_read32_def_table\r |
800 | ldr r2, =m_read32_table\r |
801 | ldr r12, [r3, r1, lsl #2]\r |
802 | str r12, [r2, r0, lsl #2]\r |
803 | \r |
804 | bx lr\r |
721cd396 |
805 | \r |
e5503e2f |
806 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
807 | \r |
808 | @ Here we only handle most often used locations,\r |
809 | @ everything else is passed to generic handlers\r |
810 | \r |
811 | PicoWrite8: @ u32 a, u8 d\r |
812 | bic r0, r0, #0xff000000\r |
813 | and r2, r0, #0x00e00000\r |
814 | cmp r2, #0x00e00000 @ RAM?\r |
815 | ldr r3, =Pico\r |
816 | biceq r0, r0, #0x00ff0000\r |
817 | eoreq r0, r0, #1\r |
818 | streqb r1, [r3, r0]\r |
819 | bxeq lr\r |
820 | \r |
821 | m_m68k_write8_misc:\r |
822 | bic r2, r0, #0x1f @ most commonly we get i/o port write,\r |
823 | cmp r2, #0xa10000 @ so check for it first\r |
824 | bne m_write8_misc2\r |
825 | m_write8_io:\r |
826 | ldr r2, =PicoOpt\r |
827 | and r0, r0, #0x1e\r |
828 | ldr r2, [r2]\r |
829 | ldr r3, =(Pico+0x22000) @ Pico.ioports\r |
830 | tst r2, #0x20 @ 6 button pad?\r |
831 | streqb r1, [r3, r0, lsr #1]\r |
832 | bxeq lr\r |
833 | cmp r0, #2\r |
834 | cmpne r0, #4\r |
835 | bne m_write8_io_done @ not likely to happen\r |
836 | add r2, r3, #0x200 @ Pico+0x22200\r |
837 | mov r12,#0\r |
838 | cmp r0, #2\r |
839 | streqb r12,[r2,#0x18]\r |
840 | strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r |
841 | tst r1, #0x40 @ TH\r |
842 | beq m_write8_io_done\r |
843 | ldrb r12,[r3, r0, lsr #1]\r |
844 | tst r12,#0x40\r |
845 | bne m_write8_io_done\r |
846 | cmp r0, #2\r |
847 | ldreqb r12,[r2,#0x0a]\r |
848 | ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
849 | add r12,r12,#1\r |
850 | streqb r12,[r2,#0x0a]\r |
851 | strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
852 | m_write8_io_done:\r |
853 | strb r1, [r3, r0, lsr #1]\r |
854 | bx lr\r |
855 | \r |
856 | \r |
857 | m_write8_misc2:\r |
858 | and r2, r0, #0xff0000\r |
859 | cmp r2, #0xa00000 @ z80 area?\r |
860 | bne m_write8_not_z80\r |
861 | tst r0, #0x4000\r |
862 | bne m_write8_z80_not_ram\r |
863 | ldr r3, =(Pico+0x20000) @ Pico.zram\r |
864 | add r2, r3, #0x02200 @ Pico+0x22200\r |
865 | ldrb r2, [r2, #9] @ Pico.m.z80Run\r |
866 | bic r0, r0, #0xff0000\r |
867 | bic r0, r0, #0x00e000\r |
868 | tst r2, #1\r |
869 | streqb r1, [r3, r0] @ zram\r |
870 | bx lr\r |
871 | \r |
872 | m_write8_z80_not_ram:\r |
873 | and r2, r0, #0x6000\r |
874 | cmp r2, #0x4000\r |
875 | bne m_write8_z80_not_ym2612\r |
876 | ldr r2, =PicoOpt\r |
877 | and r0, r0, #3\r |
878 | ldr r2, [r2]\r |
879 | tst r2, #1\r |
880 | bxeq lr\r |
881 | stmfd sp!,{lr}\r |
882 | .if EXTERNAL_YM2612\r |
883 | tst r2, #0x200\r |
884 | ldreq r2, =YM2612Write_\r |
885 | ldrne r2, =YM2612Write_940\r |
886 | mov lr, pc\r |
887 | bx r2\r |
888 | .else\r |
889 | bl YM2612Write_\r |
890 | .endif\r |
891 | ldr r2, =emustatus\r |
892 | ldmfd sp!,{lr}\r |
893 | ldr r1, [r2]\r |
894 | orr r1, r0, r2\r |
895 | str r1, [r2] @ emustatus|=YM2612Write(a&3, d);\r |
896 | bx lr\r |
897 | \r |
898 | m_write8_z80_not_ym2612: @ not too likely\r |
899 | mov r2, r0, lsl #17\r |
900 | bic r2, r2, #6<<17\r |
901 | mov r3, #0x7f00\r |
902 | orr r3, r3, #0x0011\r |
903 | cmp r3, r2, lsr #17 @ psg @ z80 area?\r |
904 | beq m_write8_psg\r |
905 | and r2, r0, #0x7f00\r |
906 | cmp r2, #0x6000 @ bank register?\r |
907 | bxne lr @ invalid write\r |
908 | \r |
909 | m_write8_z80_bank_reg:\r |
910 | ldr r3, =(Pico+0x22208) @ Pico.m\r |
911 | ldrh r2, [r3, #0x0a]\r |
912 | mov r1, r1, lsr #8\r |
913 | orr r2, r1, r2, lsr #1\r |
914 | bic r2, r2, #0xfe00\r |
915 | strh r2, [r3, #0x0a]\r |
916 | bx lr\r |
917 | \r |
918 | \r |
919 | m_write8_not_z80:\r |
920 | and r2, r0, #0xe70000\r |
921 | cmp r2, #0xc00000 @ VDP area?\r |
bf537655 |
922 | bne OtherWrite8 @ passthrough\r |
e5503e2f |
923 | and r2, r0, #0xf9\r |
924 | cmp r2, #0x11\r |
bf537655 |
925 | bne OtherWrite8\r |
e5503e2f |
926 | m_write8_psg:\r |
927 | ldr r2, =PicoOpt\r |
928 | mov r0, r1\r |
929 | ldr r2, [r2]\r |
930 | tst r2, #2\r |
931 | bxeq lr\r |
bf537655 |
932 | b SN76496Write\r |
e5503e2f |
933 | \r |