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1 | @ vim:filetype=armasm\r |
2 | \r |
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3 | @ memory handlers with banking support for SSF II - The New Challengers\r |
4 | @ mostly based on Gens code\r |
5 | \r |
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6 | @ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r |
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7 | @ All Rights Reserved\r |
8 | \r |
9 | \r |
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10 | .include "port_config.s"\r |
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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 |
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25 | .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks\r |
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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 |
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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 |
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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 |
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43 | .long m_read8_vdp @ 0xD00000 - 0xD7FFFF\r |
44 | .long m_read8_vdp @ 0xD80000 - 0xDFFFFF\r |
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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 |
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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 |
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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 |
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76 | .long m_read16_vdp @ 0xC80000 - 0xCFFFFF\r |
77 | .long m_read16_vdp @ 0xD00000 - 0xD7FFFF\r |
78 | .long m_read16_vdp @ 0xD80000 - 0xDFFFFF\r |
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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 |
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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 |
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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 |
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110 | .long m_read32_vdp @ 0xC80000 - 0xCFFFFF\r |
111 | .long m_read32_vdp @ 0xD00000 - 0xD7FFFF\r |
112 | .long m_read32_vdp @ 0xD80000 - 0xDFFFFF\r |
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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 |
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144 | .global PicoWrite8\r |
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145 | .global PicoWriteRomHW_SSF2\r |
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146 | .global m_m68k_read8_misc\r |
147 | .global m_m68k_write8_misc\r |
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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 |
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287 | ldr r1, [r2, #4] @ SRam.start\r |
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288 | cmp r0, r1\r |
289 | blt m_read8_nosram\r |
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290 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
291 | tst r1, #5\r |
292 | bne SRAMRead\r |
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293 | m_read8_nosram:\r |
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294 | ldr r1, [r3, #4] @ romsize\r |
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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 |
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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 |
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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 |
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350 | m_read8_misc:\r |
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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 |
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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 |
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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 |
438 | stmfd sp!,{r0,lr}\r |
439 | bic r0, r0, #1\r |
440 | mov r1, #8\r |
66fdc0f0 |
441 | bl OtherRead16End\r |
cc68a136 |
442 | ldmfd sp!,{r1,lr}\r |
443 | tst r1, #1\r |
444 | moveq r0, r0, lsr #8\r |
445 | bx lr\r |
446 | \r |
447 | .pool\r |
448 | \r |
449 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
450 | \r |
451 | .macro m_read16_rom sect\r |
452 | ldr r1, =(Pico+0x22200)\r |
453 | bic r0, r0, #0xf80000\r |
454 | ldr r1, [r1]\r |
455 | bic r0, r0, #1\r |
456 | .if \sect\r |
457 | orr r0, r0, #0x080000*\sect\r |
458 | .endif\r |
459 | ldrh r0, [r1, r0]\r |
460 | bx lr\r |
461 | .endm\r |
462 | \r |
463 | \r |
464 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
465 | m_read16_rom 0\r |
466 | \r |
467 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
468 | m_read16_rom 1\r |
469 | \r |
470 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
471 | m_read16_rom 2\r |
472 | \r |
473 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
474 | m_read16_rom 3\r |
475 | \r |
476 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
477 | ldr r2, =(SRam)\r |
478 | ldr r3, =(Pico+0x22200)\r |
479 | ldr r1, [r2, #8] @ SRam.end\r |
480 | bic r0, r0, #0xf80000\r |
481 | bic r0, r0, #1\r |
482 | orr r0, r0, #0x200000\r |
483 | cmp r0, r1\r |
484 | bgt m_read16_nosram\r |
7969166e |
485 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
486 | cmp r0, r1\r |
487 | blt m_read16_nosram\r |
7969166e |
488 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
489 | tst r1, #5\r |
490 | beq m_read16_nosram\r |
491 | stmfd sp!,{lr}\r |
492 | bl SRAMRead\r |
493 | orr r0, r0, r0, lsl #8\r |
494 | ldmfd sp!,{pc}\r |
cc68a136 |
495 | m_read16_nosram:\r |
7969166e |
496 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
497 | cmp r0, r1\r |
498 | movgt r0, #0\r |
499 | bxgt lr @ bad location\r |
500 | ldr r1, [r3] @ 1ci\r |
501 | ldrh r0, [r1, r0]\r |
502 | bx lr\r |
503 | \r |
504 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
505 | m_read16_rom 5\r |
506 | \r |
507 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
508 | m_read16_rom 6\r |
509 | \r |
510 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
511 | m_read16_rom 7\r |
512 | \r |
513 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
514 | m_read16_rom 8\r |
515 | \r |
516 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
517 | m_read16_rom 9\r |
518 | \r |
cc68a136 |
519 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
520 | m_read16_rom 0xA\r |
521 | \r |
522 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
523 | m_read16_rom 0xB\r |
524 | \r |
525 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
526 | m_read16_rom 0xC\r |
527 | \r |
528 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
529 | m_read16_rom 0xD\r |
530 | \r |
531 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
532 | m_read16_rom 0xE\r |
533 | \r |
534 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
535 | m_read16_rom 0xF\r |
536 | \r |
29a95187 |
537 | m_read16_rom10: @ 0x800000 - 0x87ffff\r |
538 | m_read16_rom 0x10\r |
539 | \r |
540 | m_read16_rom11: @ 0x880000 - 0x8fffff\r |
541 | m_read16_rom 0x11\r |
542 | \r |
543 | m_read16_rom12: @ 0x900000 - 0x97ffff\r |
544 | m_read16_rom 0x12\r |
545 | \r |
546 | m_read16_rom13: @ 0x980000 - 0x9fffff\r |
547 | m_read16_rom 0x13\r |
548 | \r |
cc68a136 |
549 | m_read16_misc:\r |
cc68a136 |
550 | bic r0, r0, #1\r |
4ff2d527 |
551 | mov r1, #16\r |
552 | b OtherRead16\r |
cc68a136 |
553 | \r |
554 | m_read16_vdp:\r |
7969166e |
555 | tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r |
cc68a136 |
556 | tsteq r0, #0x000e0\r |
557 | bxne lr @ invalid read\r |
cc68a136 |
558 | bic r0, r0, #1\r |
4ff2d527 |
559 | b PicoVideoRead\r |
cc68a136 |
560 | \r |
561 | m_read16_ram:\r |
562 | ldr r1, =Pico\r |
563 | bic r0, r0, #0xff0000\r |
564 | bic r0, r0, #1\r |
565 | ldrh r0, [r1, r0]\r |
566 | bx lr\r |
567 | \r |
568 | m_read16_above_rom:\r |
cc68a136 |
569 | bic r0, r0, #1\r |
4ff2d527 |
570 | mov r1, #16\r |
571 | b OtherRead16End\r |
cc68a136 |
572 | \r |
573 | .pool\r |
574 | \r |
575 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
576 | \r |
577 | .macro m_read32_rom sect\r |
578 | ldr r1, =(Pico+0x22200)\r |
579 | bic r0, r0, #0xf80000\r |
580 | ldr r1, [r1]\r |
581 | bic r0, r0, #1\r |
582 | .if \sect\r |
583 | orr r0, r0, #0x080000*\sect\r |
584 | .endif\r |
585 | ldrh r0, [r1, r0]!\r |
586 | ldrh r1, [r1, #2] @ 1ci\r |
587 | orr r0, r1, r0, lsl #16\r |
588 | bx lr\r |
589 | .endm\r |
590 | \r |
591 | \r |
592 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
593 | m_read32_rom 0\r |
594 | \r |
595 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
596 | m_read32_rom 1\r |
597 | \r |
598 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
599 | m_read32_rom 2\r |
600 | \r |
601 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
602 | m_read32_rom 3\r |
603 | \r |
604 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
605 | ldr r2, =(SRam)\r |
606 | ldr r3, =(Pico+0x22200)\r |
607 | ldr r1, [r2, #8] @ SRam.end\r |
608 | bic r0, r0, #0xf80000\r |
609 | bic r0, r0, #1\r |
610 | orr r0, r0, #0x200000\r |
611 | cmp r0, r1\r |
612 | bgt m_read32_nosram\r |
7969166e |
613 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
614 | cmp r0, r1\r |
615 | blt m_read32_nosram\r |
7969166e |
616 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
617 | tst r1, #5\r |
618 | beq m_read32_nosram\r |
619 | stmfd sp!,{r0,lr}\r |
620 | bl SRAMRead\r |
621 | ldmfd sp!,{r1,lr}\r |
622 | stmfd sp!,{r0,lr}\r |
623 | add r0, r1, #2\r |
624 | bl SRAMRead\r |
625 | ldmfd sp!,{r1,lr}\r |
626 | orr r0, r1, r0, lsl #16\r |
627 | orr r0, r0, r0, lsl #8\r |
cc68a136 |
628 | bx lr\r |
629 | m_read32_nosram:\r |
7969166e |
630 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
631 | cmp r0, r1\r |
632 | movgt r0, #0\r |
633 | bxgt lr @ bad location\r |
634 | ldr r1, [r3] @ (1ci)\r |
635 | ldrh r0, [r1, r0]!\r |
636 | ldrh r1, [r1, #2] @ (2ci)\r |
637 | orr r0, r1, r0, lsl #16\r |
638 | bx lr\r |
639 | \r |
640 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
641 | m_read32_rom 5\r |
642 | \r |
643 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
644 | m_read32_rom 6\r |
645 | \r |
646 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
647 | m_read32_rom 7\r |
648 | \r |
649 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
650 | m_read32_rom 8\r |
651 | \r |
652 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
653 | m_read32_rom 9\r |
654 | \r |
cc68a136 |
655 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
656 | m_read32_rom 0xA\r |
657 | \r |
658 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
659 | m_read32_rom 0xB\r |
660 | \r |
661 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
662 | m_read32_rom 0xC\r |
663 | \r |
664 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
665 | m_read32_rom 0xD\r |
666 | \r |
667 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
668 | m_read32_rom 0xE\r |
669 | \r |
670 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
671 | m_read32_rom 0xF\r |
672 | \r |
29a95187 |
673 | m_read32_rom10: @ 0x800000 - 0x87ffff\r |
674 | m_read32_rom 0x10\r |
675 | \r |
676 | m_read32_rom11: @ 0x880000 - 0x8fffff\r |
677 | m_read32_rom 0x11\r |
678 | \r |
679 | m_read32_rom12: @ 0x900000 - 0x97ffff\r |
680 | m_read32_rom 0x12\r |
681 | \r |
682 | m_read32_rom13: @ 0x980000 - 0x9fffff\r |
683 | m_read32_rom 0x13\r |
684 | \r |
cc68a136 |
685 | m_read32_misc:\r |
686 | bic r0, r0, #1\r |
687 | stmfd sp!,{r0,lr}\r |
688 | mov r1, #32\r |
689 | bl OtherRead16\r |
690 | mov r1, r0\r |
691 | ldmfd sp!,{r0}\r |
692 | stmfd sp!,{r1}\r |
693 | add r0, r0, #2\r |
694 | mov r1, #32\r |
695 | bl OtherRead16\r |
696 | ldmfd sp!,{r1,lr}\r |
697 | orr r0, r0, r1, lsl #16\r |
698 | bx lr\r |
699 | \r |
700 | m_read32_vdp:\r |
701 | tst r0, #0x70000\r |
702 | tsteq r0, #0x000e0\r |
703 | bxne lr @ invalid read\r |
704 | bic r0, r0, #1\r |
4ff2d527 |
705 | add r1, r0, #2\r |
706 | stmfd sp!,{r1,lr}\r |
cc68a136 |
707 | bl PicoVideoRead\r |
4ff2d527 |
708 | swp r0, r0, [sp]\r |
cc68a136 |
709 | bl PicoVideoRead\r |
710 | ldmfd sp!,{r1,lr}\r |
711 | orr r0, r0, r1, lsl #16\r |
712 | bx lr\r |
713 | \r |
714 | m_read32_ram:\r |
715 | ldr r1, =Pico\r |
716 | bic r0, r0, #0xff0000\r |
717 | bic r0, r0, #1\r |
718 | ldrh r0, [r1, r0]!\r |
719 | ldrh r1, [r1, #2] @ 2ci\r |
720 | orr r0, r1, r0, lsl #16\r |
721 | bx lr\r |
722 | \r |
723 | m_read32_above_rom:\r |
724 | bic r0, r0, #1\r |
725 | stmfd sp!,{r0,lr}\r |
726 | mov r1, #32\r |
66fdc0f0 |
727 | bl OtherRead16End\r |
cc68a136 |
728 | mov r1, r0\r |
729 | ldmfd sp!,{r0}\r |
730 | stmfd sp!,{r1}\r |
731 | add r0, r0, #2\r |
732 | mov r1, #32\r |
66fdc0f0 |
733 | bl OtherRead16End\r |
cc68a136 |
734 | ldmfd sp!,{r1,lr}\r |
735 | orr r0, r0, r1, lsl #16\r |
736 | bx lr\r |
737 | \r |
738 | .pool\r |
739 | \r |
740 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
741 | \r |
742 | PicoWriteRomHW_SSF2: @ u32 a, u32 d\r |
743 | and r0, r0, #0xe\r |
744 | movs r0, r0, lsr #1\r |
745 | bne pwr_banking\r |
746 | \r |
747 | @ sram register\r |
748 | ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r |
721cd396 |
749 | ldrb r0, [r2]\r |
cc68a136 |
750 | and r1, r1, #3\r |
721cd396 |
751 | bic r0, r0, #3\r |
752 | orr r0, r0, r1\r |
753 | strb r0, [r2]\r |
cc68a136 |
754 | bx lr\r |
755 | \r |
756 | pwr_banking:\r |
757 | and r1, r1, #0x1f\r |
758 | \r |
759 | ldr r3, =m_read8_def_table\r |
760 | ldr r2, =m_read8_table\r |
761 | ldr r12, [r3, r1, lsl #2]\r |
762 | str r12, [r2, r0, lsl #2]\r |
763 | \r |
764 | ldr r3, =m_read16_def_table\r |
765 | ldr r2, =m_read16_table\r |
766 | ldr r12, [r3, r1, lsl #2]\r |
767 | str r12, [r2, r0, lsl #2]\r |
768 | \r |
769 | ldr r3, =m_read32_def_table\r |
770 | ldr r2, =m_read32_table\r |
771 | ldr r12, [r3, r1, lsl #2]\r |
772 | str r12, [r2, r0, lsl #2]\r |
773 | \r |
774 | bx lr\r |
721cd396 |
775 | \r |
e5503e2f |
776 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
777 | \r |
778 | @ Here we only handle most often used locations,\r |
779 | @ everything else is passed to generic handlers\r |
780 | \r |
781 | PicoWrite8: @ u32 a, u8 d\r |
782 | bic r0, r0, #0xff000000\r |
783 | and r2, r0, #0x00e00000\r |
784 | cmp r2, #0x00e00000 @ RAM?\r |
785 | ldr r3, =Pico\r |
786 | biceq r0, r0, #0x00ff0000\r |
787 | eoreq r0, r0, #1\r |
788 | streqb r1, [r3, r0]\r |
789 | bxeq lr\r |
790 | \r |
791 | m_m68k_write8_misc:\r |
792 | bic r2, r0, #0x1f @ most commonly we get i/o port write,\r |
793 | cmp r2, #0xa10000 @ so check for it first\r |
794 | bne m_write8_misc2\r |
795 | m_write8_io:\r |
796 | ldr r2, =PicoOpt\r |
797 | and r0, r0, #0x1e\r |
798 | ldr r2, [r2]\r |
799 | ldr r3, =(Pico+0x22000) @ Pico.ioports\r |
800 | tst r2, #0x20 @ 6 button pad?\r |
801 | streqb r1, [r3, r0, lsr #1]\r |
802 | bxeq lr\r |
803 | cmp r0, #2\r |
804 | cmpne r0, #4\r |
805 | bne m_write8_io_done @ not likely to happen\r |
806 | add r2, r3, #0x200 @ Pico+0x22200\r |
807 | mov r12,#0\r |
808 | cmp r0, #2\r |
809 | streqb r12,[r2,#0x18]\r |
810 | strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r |
811 | tst r1, #0x40 @ TH\r |
812 | beq m_write8_io_done\r |
813 | ldrb r12,[r3, r0, lsr #1]\r |
814 | tst r12,#0x40\r |
815 | bne m_write8_io_done\r |
816 | cmp r0, #2\r |
817 | ldreqb r12,[r2,#0x0a]\r |
818 | ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
819 | add r12,r12,#1\r |
820 | streqb r12,[r2,#0x0a]\r |
821 | strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
822 | m_write8_io_done:\r |
823 | strb r1, [r3, r0, lsr #1]\r |
824 | bx lr\r |
825 | \r |
826 | \r |
827 | m_write8_misc2:\r |
828 | and r2, r0, #0xff0000\r |
829 | cmp r2, #0xa00000 @ z80 area?\r |
830 | bne m_write8_not_z80\r |
831 | tst r0, #0x4000\r |
832 | bne m_write8_z80_not_ram\r |
833 | ldr r3, =(Pico+0x20000) @ Pico.zram\r |
834 | add r2, r3, #0x02200 @ Pico+0x22200\r |
835 | ldrb r2, [r2, #9] @ Pico.m.z80Run\r |
836 | bic r0, r0, #0xff0000\r |
837 | bic r0, r0, #0x00e000\r |
838 | tst r2, #1\r |
839 | streqb r1, [r3, r0] @ zram\r |
840 | bx lr\r |
841 | \r |
842 | m_write8_z80_not_ram:\r |
843 | and r2, r0, #0x6000\r |
844 | cmp r2, #0x4000\r |
845 | bne m_write8_z80_not_ym2612\r |
846 | ldr r2, =PicoOpt\r |
847 | and r0, r0, #3\r |
848 | ldr r2, [r2]\r |
849 | tst r2, #1\r |
850 | bxeq lr\r |
851 | stmfd sp!,{lr}\r |
852 | .if EXTERNAL_YM2612\r |
853 | tst r2, #0x200\r |
854 | ldreq r2, =YM2612Write_\r |
855 | ldrne r2, =YM2612Write_940\r |
856 | mov lr, pc\r |
857 | bx r2\r |
858 | .else\r |
859 | bl YM2612Write_\r |
860 | .endif\r |
861 | ldr r2, =emustatus\r |
862 | ldmfd sp!,{lr}\r |
863 | ldr r1, [r2]\r |
864 | orr r1, r0, r2\r |
865 | str r1, [r2] @ emustatus|=YM2612Write(a&3, d);\r |
866 | bx lr\r |
867 | \r |
868 | m_write8_z80_not_ym2612: @ not too likely\r |
869 | mov r2, r0, lsl #17\r |
870 | bic r2, r2, #6<<17\r |
871 | mov r3, #0x7f00\r |
872 | orr r3, r3, #0x0011\r |
873 | cmp r3, r2, lsr #17 @ psg @ z80 area?\r |
874 | beq m_write8_psg\r |
875 | and r2, r0, #0x7f00\r |
876 | cmp r2, #0x6000 @ bank register?\r |
877 | bxne lr @ invalid write\r |
878 | \r |
879 | m_write8_z80_bank_reg:\r |
880 | ldr r3, =(Pico+0x22208) @ Pico.m\r |
881 | ldrh r2, [r3, #0x0a]\r |
882 | mov r1, r1, lsr #8\r |
883 | orr r2, r1, r2, lsr #1\r |
884 | bic r2, r2, #0xfe00\r |
885 | strh r2, [r3, #0x0a]\r |
886 | bx lr\r |
887 | \r |
888 | \r |
889 | m_write8_not_z80:\r |
890 | and r2, r0, #0xe70000\r |
891 | cmp r2, #0xc00000 @ VDP area?\r |
bf537655 |
892 | bne OtherWrite8 @ passthrough\r |
e5503e2f |
893 | and r2, r0, #0xf9\r |
894 | cmp r2, #0x11\r |
bf537655 |
895 | bne OtherWrite8\r |
e5503e2f |
896 | m_write8_psg:\r |
897 | ldr r2, =PicoOpt\r |
898 | mov r0, r1\r |
899 | ldr r2, [r2]\r |
900 | tst r2, #2\r |
901 | bxeq lr\r |
bf537655 |
902 | b SN76496Write\r |
e5503e2f |
903 | \r |