4ff2d527 |
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 |
6cadc2da |
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 |
43 | .long m_read_null @ 0xD00000 - 0xD7FFFF\r |
44 | .long m_read_null @ 0xD80000 - 0xDFFFFF\r |
45 | .long m_read8_ram @ 0xE00000 - 0xE7FFFF\r |
46 | .long m_read8_ram @ 0xE80000 - 0xEFFFFF\r |
47 | .long m_read8_ram @ 0xF00000 - 0xF7FFFF\r |
48 | .long m_read8_ram @ 0xF80000 - 0xFFFFFF\r |
49 | \r |
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 |
76 | .long m_read_null @ 0xC80000 - 0xCFFFFF\r |
77 | .long m_read_null @ 0xD00000 - 0xD7FFFF\r |
78 | .long m_read_null @ 0xD80000 - 0xDFFFFF\r |
79 | .long m_read16_ram @ 0xE00000 - 0xE7FFFF\r |
80 | .long m_read16_ram @ 0xE80000 - 0xEFFFFF\r |
81 | .long m_read16_ram @ 0xF00000 - 0xF7FFFF\r |
82 | .long m_read16_ram @ 0xF80000 - 0xFFFFFF\r |
83 | \r |
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 |
110 | .long m_read_null @ 0xC80000 - 0xCFFFFF\r |
111 | .long m_read_null @ 0xD00000 - 0xD7FFFF\r |
112 | .long m_read_null @ 0xD80000 - 0xDFFFFF\r |
113 | .long m_read32_ram @ 0xE00000 - 0xE7FFFF\r |
114 | .long m_read32_ram @ 0xE80000 - 0xEFFFFF\r |
115 | .long m_read32_ram @ 0xF00000 - 0xF7FFFF\r |
116 | .long m_read32_ram @ 0xF80000 - 0xFFFFFF\r |
117 | \r |
118 | \r |
119 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
120 | \r |
121 | .bss\r |
122 | @.section .bss, "brw"\r |
123 | @.data\r |
124 | \r |
125 | @ used tables\r |
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 |
287 | ldr r1, [r2, #4] @ SRam.start (1ci)\r |
288 | cmp r0, r1\r |
289 | blt m_read8_nosram\r |
290 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (1ci)\r |
291 | sub r12,r0, #0x200000\r |
292 | tst r1, #0x10\r |
293 | bne m_read8_detected\r |
294 | cmp r12,#1\r |
295 | ble m_read8_detected\r |
296 | tst r1, #1\r |
297 | orrne r1, r1, #0x10\r |
298 | strneb r1, [r3, #0x11]\r |
299 | m_read8_detected:\r |
300 | tst r1, #4 @ EEPROM read?\r |
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301 | bne SRAMReadEEPROM\r |
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302 | m_read8_noteeprom:\r |
303 | tst r1, #1\r |
304 | beq m_read8_nosram\r |
305 | ldr r3, [r2] @ SRam.data\r |
306 | ldr r2, [r2, #4] @ SRam.start (1ci)\r |
307 | sub r3, r3, r2\r |
308 | ldrb r0, [r3, r0]\r |
309 | bx lr\r |
310 | m_read8_nosram:\r |
311 | ldr r1, [r3, #4] @ 1ci\r |
312 | cmp r0, r1\r |
313 | movgt r0, #0\r |
314 | bxgt lr @ bad location\r |
315 | ldr r1, [r3]\r |
316 | eor r0, r0, #1\r |
317 | ldrb r0, [r1, r0]\r |
318 | bx lr\r |
319 | \r |
320 | m_read8_rom5: @ 0x280000 - 0x2fffff\r |
321 | m_read8_rom 5\r |
322 | \r |
323 | m_read8_rom6: @ 0x300000 - 0x37ffff\r |
324 | m_read8_rom 6\r |
325 | \r |
326 | m_read8_rom7: @ 0x380000 - 0x3fffff\r |
327 | m_read8_rom 7\r |
328 | \r |
329 | m_read8_rom8: @ 0x400000 - 0x47ffff\r |
330 | m_read8_rom 8\r |
331 | \r |
332 | m_read8_rom9: @ 0x480000 - 0x4fffff\r |
333 | m_read8_rom 9\r |
334 | \r |
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335 | m_read8_romA: @ 0x500000 - 0x57ffff\r |
336 | m_read8_rom 0xA\r |
337 | \r |
338 | m_read8_romB: @ 0x580000 - 0x5fffff\r |
339 | m_read8_rom 0xB\r |
340 | \r |
341 | m_read8_romC: @ 0x600000 - 0x67ffff\r |
342 | m_read8_rom 0xC\r |
343 | \r |
344 | m_read8_romD: @ 0x680000 - 0x6fffff\r |
345 | m_read8_rom 0xD\r |
346 | \r |
347 | m_read8_romE: @ 0x700000 - 0x77ffff\r |
348 | m_read8_rom 0xE\r |
349 | \r |
350 | m_read8_romF: @ 0x780000 - 0x7fffff\r |
351 | m_read8_rom 0xF\r |
352 | \r |
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353 | m_read8_rom10: @ 0x800000 - 0x87ffff\r |
354 | m_read8_rom 0x10\r |
355 | \r |
356 | m_read8_rom11: @ 0x880000 - 0x8fffff\r |
357 | m_read8_rom 0x11\r |
358 | \r |
359 | m_read8_rom12: @ 0x900000 - 0x97ffff\r |
360 | m_read8_rom 0x12\r |
361 | \r |
362 | m_read8_rom13: @ 0x980000 - 0x9fffff\r |
363 | m_read8_rom 0x13\r |
364 | \r |
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365 | \r |
366 | m_m68k_read8_misc:\r |
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367 | m_read8_misc:\r |
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368 | bic r2, r0, #0x001f @ most commonly we get i/o port read,\r |
369 | cmp r2, #0xa10000 @ so check for it first\r |
370 | bne m_read8_misc2\r |
371 | m_read8_misc_io:\r |
372 | ands r0, r0, #0x1e\r |
373 | beq m_read8_misc_hwreg\r |
374 | cmp r0, #4\r |
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375 | movlt r0, #0\r |
376 | moveq r0, #1\r |
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377 | ble PadRead\r |
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378 | ldr r3, =(Pico+0x22000)\r |
379 | mov r0, r0, lsr #1 @ other IO ports (Pico.ioports[a])\r |
380 | ldrb r0, [r3, r0]\r |
381 | bx lr\r |
382 | \r |
383 | m_read8_misc_hwreg:\r |
384 | ldr r3, =(Pico+0x22200)\r |
385 | ldrb r0, [r3, #0x0f] @ Pico.m.hardware\r |
386 | bx lr\r |
387 | \r |
388 | m_read8_misc2:\r |
389 | mov r2, #0xa10000 @ games also like to poll busreq,\r |
390 | orr r2, r2, #0x001100 @ so we'll try it now\r |
391 | cmp r0, r2\r |
bf537655 |
392 | beq z80ReadBusReq\r |
e5503e2f |
393 | \r |
394 | and r2, r0, #0xff0000 @ finally it might be\r |
395 | cmp r2, #0xa00000 @ z80 area\r |
396 | bne m_read8_misc3\r |
397 | tst r0, #0x4000\r |
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398 | beq z80Read8 @ z80 RAM\r |
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399 | and r2, r0, #0x6000\r |
400 | cmp r2, #0x4000\r |
401 | mvnne r0, #0\r |
402 | bxne lr @ invalid\r |
403 | .if EXTERNAL_YM2612\r |
404 | ldr r1, =PicoOpt\r |
405 | ldr r1, [r1]\r |
406 | tst r1, #1\r |
407 | beq m_read8_fake_ym2612\r |
408 | tst r1, #0x200\r |
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409 | beq YM2612Read_\r |
410 | b YM2612Read_940\r |
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411 | .else\r |
bf537655 |
412 | b YM2612Read_\r |
e5503e2f |
413 | .endif\r |
e5503e2f |
414 | \r |
415 | m_read8_fake_ym2612:\r |
416 | ldr r3, =(Pico+0x22200)\r |
417 | ldrb r0, [r3, #8] @ Pico.m.rotate\r |
418 | add r1, r0, #1\r |
419 | strb r1, [r3, #8]\r |
420 | and r0, r0, #3\r |
421 | bx lr\r |
422 | \r |
423 | m_read8_misc3:\r |
424 | @ if everything else fails, use generic handler\r |
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425 | stmfd sp!,{r0,lr}\r |
426 | bic r0, r0, #1\r |
427 | mov r1, #8\r |
428 | bl OtherRead16\r |
429 | ldmfd sp!,{r1,lr}\r |
430 | tst r1, #1\r |
431 | moveq r0, r0, lsr #8\r |
432 | bx lr\r |
433 | \r |
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434 | \r |
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435 | m_read8_vdp:\r |
436 | tst r0, #0x70000\r |
437 | tsteq r0, #0x000e0\r |
438 | bxne lr @ invalid read\r |
439 | stmfd sp!,{r0,lr}\r |
440 | bic r0, r0, #1\r |
441 | bl PicoVideoRead\r |
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 | m_read8_ram:\r |
448 | ldr r1, =Pico\r |
449 | bic r0, r0, #0xff0000\r |
450 | eor r0, r0, #1\r |
451 | ldrb r0, [r1, r0]\r |
452 | bx lr\r |
453 | \r |
454 | m_read8_above_rom:\r |
455 | stmfd sp!,{r0,lr}\r |
456 | bic r0, r0, #1\r |
457 | mov r1, #8\r |
66fdc0f0 |
458 | bl OtherRead16End\r |
cc68a136 |
459 | ldmfd sp!,{r1,lr}\r |
460 | tst r1, #1\r |
461 | moveq r0, r0, lsr #8\r |
462 | bx lr\r |
463 | \r |
464 | .pool\r |
465 | \r |
466 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
467 | \r |
468 | .macro m_read16_rom sect\r |
469 | ldr r1, =(Pico+0x22200)\r |
470 | bic r0, r0, #0xf80000\r |
471 | ldr r1, [r1]\r |
472 | bic r0, r0, #1\r |
473 | .if \sect\r |
474 | orr r0, r0, #0x080000*\sect\r |
475 | .endif\r |
476 | ldrh r0, [r1, r0]\r |
477 | bx lr\r |
478 | .endm\r |
479 | \r |
480 | \r |
481 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
482 | m_read16_rom 0\r |
483 | \r |
484 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
485 | m_read16_rom 1\r |
486 | \r |
487 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
488 | m_read16_rom 2\r |
489 | \r |
490 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
491 | m_read16_rom 3\r |
492 | \r |
493 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
494 | ldr r2, =(SRam)\r |
495 | ldr r3, =(Pico+0x22200)\r |
496 | ldr r1, [r2, #8] @ SRam.end\r |
497 | bic r0, r0, #0xf80000\r |
498 | bic r0, r0, #1\r |
499 | orr r0, r0, #0x200000\r |
500 | cmp r0, r1\r |
501 | bgt m_read16_nosram\r |
502 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r |
503 | tst r1, #1\r |
504 | beq m_read16_nosram\r |
505 | ldr r1, [r2, #4] @ SRam.start (1ci)\r |
506 | cmp r0, r1\r |
507 | blt m_read16_nosram\r |
508 | ldr r2, [r2] @ SRam.data (1ci)\r |
509 | sub r2, r2, r1\r |
510 | ldrh r0, [r2, r0] @ 2ci\r |
511 | and r1, r0, #0xff\r |
512 | mov r0, r0, lsr #8\r |
513 | orr r0, r0, r1, lsl #8\r |
514 | bx lr\r |
721cd396 |
515 | \r |
cc68a136 |
516 | m_read16_nosram:\r |
517 | ldr r1, [r3, #4] @ 1ci\r |
518 | cmp r0, r1\r |
519 | movgt r0, #0\r |
520 | bxgt lr @ bad location\r |
521 | ldr r1, [r3] @ 1ci\r |
522 | ldrh r0, [r1, r0]\r |
523 | bx lr\r |
524 | \r |
525 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
526 | m_read16_rom 5\r |
527 | \r |
528 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
529 | m_read16_rom 6\r |
530 | \r |
531 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
532 | m_read16_rom 7\r |
533 | \r |
534 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
535 | m_read16_rom 8\r |
536 | \r |
537 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
538 | m_read16_rom 9\r |
539 | \r |
cc68a136 |
540 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
541 | m_read16_rom 0xA\r |
542 | \r |
543 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
544 | m_read16_rom 0xB\r |
545 | \r |
546 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
547 | m_read16_rom 0xC\r |
548 | \r |
549 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
550 | m_read16_rom 0xD\r |
551 | \r |
552 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
553 | m_read16_rom 0xE\r |
554 | \r |
555 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
556 | m_read16_rom 0xF\r |
557 | \r |
29a95187 |
558 | m_read16_rom10: @ 0x800000 - 0x87ffff\r |
559 | m_read16_rom 0x10\r |
560 | \r |
561 | m_read16_rom11: @ 0x880000 - 0x8fffff\r |
562 | m_read16_rom 0x11\r |
563 | \r |
564 | m_read16_rom12: @ 0x900000 - 0x97ffff\r |
565 | m_read16_rom 0x12\r |
566 | \r |
567 | m_read16_rom13: @ 0x980000 - 0x9fffff\r |
568 | m_read16_rom 0x13\r |
569 | \r |
cc68a136 |
570 | m_read16_misc:\r |
cc68a136 |
571 | bic r0, r0, #1\r |
4ff2d527 |
572 | mov r1, #16\r |
573 | b OtherRead16\r |
cc68a136 |
574 | \r |
575 | m_read16_vdp:\r |
576 | tst r0, #0x70000\r |
577 | tsteq r0, #0x000e0\r |
578 | bxne lr @ invalid read\r |
cc68a136 |
579 | bic r0, r0, #1\r |
4ff2d527 |
580 | b PicoVideoRead\r |
cc68a136 |
581 | \r |
582 | m_read16_ram:\r |
583 | ldr r1, =Pico\r |
584 | bic r0, r0, #0xff0000\r |
585 | bic r0, r0, #1\r |
586 | ldrh r0, [r1, r0]\r |
587 | bx lr\r |
588 | \r |
589 | m_read16_above_rom:\r |
cc68a136 |
590 | bic r0, r0, #1\r |
4ff2d527 |
591 | mov r1, #16\r |
592 | b OtherRead16End\r |
cc68a136 |
593 | \r |
594 | .pool\r |
595 | \r |
596 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
597 | \r |
598 | .macro m_read32_rom sect\r |
599 | ldr r1, =(Pico+0x22200)\r |
600 | bic r0, r0, #0xf80000\r |
601 | ldr r1, [r1]\r |
602 | bic r0, r0, #1\r |
603 | .if \sect\r |
604 | orr r0, r0, #0x080000*\sect\r |
605 | .endif\r |
606 | ldrh r0, [r1, r0]!\r |
607 | ldrh r1, [r1, #2] @ 1ci\r |
608 | orr r0, r1, r0, lsl #16\r |
609 | bx lr\r |
610 | .endm\r |
611 | \r |
612 | \r |
613 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
614 | m_read32_rom 0\r |
615 | \r |
616 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
617 | m_read32_rom 1\r |
618 | \r |
619 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
620 | m_read32_rom 2\r |
621 | \r |
622 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
623 | m_read32_rom 3\r |
624 | \r |
625 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
626 | ldr r2, =(SRam)\r |
627 | ldr r3, =(Pico+0x22200)\r |
628 | ldr r1, [r2, #8] @ SRam.end\r |
629 | bic r0, r0, #0xf80000\r |
630 | bic r0, r0, #1\r |
631 | orr r0, r0, #0x200000\r |
632 | cmp r0, r1\r |
633 | bgt m_read32_nosram\r |
634 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)\r |
635 | tst r1, #1\r |
636 | beq m_read32_nosram\r |
637 | ldr r1, [r2, #4] @ SRam.start (1ci)\r |
638 | cmp r0, r1\r |
639 | blt m_read32_nosram\r |
640 | ldr r2, [r2] @ SRam.data (1ci)\r |
641 | sub r2, r2, r1\r |
642 | ldrh r0, [r2, r0]! @ (1ci)\r |
643 | ldrh r1, [r2, #2]\r |
644 | orr r0, r0, r0, lsl #16\r |
645 | mov r0, r0, ror #8\r |
646 | mov r0, r0, lsl #16\r |
647 | orr r0, r0, r1, lsr #8\r |
648 | and r1, r1, #0xff\r |
649 | orr r0, r0, r1, lsl #8\r |
650 | bx lr\r |
721cd396 |
651 | \r |
cc68a136 |
652 | m_read32_nosram:\r |
653 | ldr r1, [r3, #4] @ (1ci)\r |
654 | cmp r0, r1\r |
655 | movgt r0, #0\r |
656 | bxgt lr @ bad location\r |
657 | ldr r1, [r3] @ (1ci)\r |
658 | ldrh r0, [r1, r0]!\r |
659 | ldrh r1, [r1, #2] @ (2ci)\r |
660 | orr r0, r1, r0, lsl #16\r |
661 | bx lr\r |
662 | \r |
663 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
664 | m_read32_rom 5\r |
665 | \r |
666 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
667 | m_read32_rom 6\r |
668 | \r |
669 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
670 | m_read32_rom 7\r |
671 | \r |
672 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
673 | m_read32_rom 8\r |
674 | \r |
675 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
676 | m_read32_rom 9\r |
677 | \r |
cc68a136 |
678 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
679 | m_read32_rom 0xA\r |
680 | \r |
681 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
682 | m_read32_rom 0xB\r |
683 | \r |
684 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
685 | m_read32_rom 0xC\r |
686 | \r |
687 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
688 | m_read32_rom 0xD\r |
689 | \r |
690 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
691 | m_read32_rom 0xE\r |
692 | \r |
693 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
694 | m_read32_rom 0xF\r |
695 | \r |
29a95187 |
696 | m_read32_rom10: @ 0x800000 - 0x87ffff\r |
697 | m_read32_rom 0x10\r |
698 | \r |
699 | m_read32_rom11: @ 0x880000 - 0x8fffff\r |
700 | m_read32_rom 0x11\r |
701 | \r |
702 | m_read32_rom12: @ 0x900000 - 0x97ffff\r |
703 | m_read32_rom 0x12\r |
704 | \r |
705 | m_read32_rom13: @ 0x980000 - 0x9fffff\r |
706 | m_read32_rom 0x13\r |
707 | \r |
cc68a136 |
708 | m_read32_misc:\r |
709 | bic r0, r0, #1\r |
710 | stmfd sp!,{r0,lr}\r |
711 | mov r1, #32\r |
712 | bl OtherRead16\r |
713 | mov r1, r0\r |
714 | ldmfd sp!,{r0}\r |
715 | stmfd sp!,{r1}\r |
716 | add r0, r0, #2\r |
717 | mov r1, #32\r |
718 | bl OtherRead16\r |
719 | ldmfd sp!,{r1,lr}\r |
720 | orr r0, r0, r1, lsl #16\r |
721 | bx lr\r |
722 | \r |
723 | m_read32_vdp:\r |
724 | tst r0, #0x70000\r |
725 | tsteq r0, #0x000e0\r |
726 | bxne lr @ invalid read\r |
727 | bic r0, r0, #1\r |
4ff2d527 |
728 | add r1, r0, #2\r |
729 | stmfd sp!,{r1,lr}\r |
cc68a136 |
730 | bl PicoVideoRead\r |
4ff2d527 |
731 | swp r0, r0, [sp]\r |
cc68a136 |
732 | bl PicoVideoRead\r |
733 | ldmfd sp!,{r1,lr}\r |
734 | orr r0, r0, r1, lsl #16\r |
735 | bx lr\r |
736 | \r |
737 | m_read32_ram:\r |
738 | ldr r1, =Pico\r |
739 | bic r0, r0, #0xff0000\r |
740 | bic r0, r0, #1\r |
741 | ldrh r0, [r1, r0]!\r |
742 | ldrh r1, [r1, #2] @ 2ci\r |
743 | orr r0, r1, r0, lsl #16\r |
744 | bx lr\r |
745 | \r |
746 | m_read32_above_rom:\r |
747 | bic r0, r0, #1\r |
748 | stmfd sp!,{r0,lr}\r |
749 | mov r1, #32\r |
66fdc0f0 |
750 | bl OtherRead16End\r |
cc68a136 |
751 | mov r1, r0\r |
752 | ldmfd sp!,{r0}\r |
753 | stmfd sp!,{r1}\r |
754 | add r0, r0, #2\r |
755 | mov r1, #32\r |
66fdc0f0 |
756 | bl OtherRead16End\r |
cc68a136 |
757 | ldmfd sp!,{r1,lr}\r |
758 | orr r0, r0, r1, lsl #16\r |
759 | bx lr\r |
760 | \r |
761 | .pool\r |
762 | \r |
763 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
764 | \r |
765 | PicoWriteRomHW_SSF2: @ u32 a, u32 d\r |
766 | and r0, r0, #0xe\r |
767 | movs r0, r0, lsr #1\r |
768 | bne pwr_banking\r |
769 | \r |
770 | @ sram register\r |
771 | ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r |
721cd396 |
772 | ldrb r0, [r2]\r |
cc68a136 |
773 | and r1, r1, #3\r |
721cd396 |
774 | bic r0, r0, #3\r |
775 | orr r0, r0, r1\r |
776 | strb r0, [r2]\r |
cc68a136 |
777 | bx lr\r |
778 | \r |
779 | pwr_banking:\r |
780 | and r1, r1, #0x1f\r |
781 | \r |
782 | ldr r3, =m_read8_def_table\r |
783 | ldr r2, =m_read8_table\r |
784 | ldr r12, [r3, r1, lsl #2]\r |
785 | str r12, [r2, r0, lsl #2]\r |
786 | \r |
787 | ldr r3, =m_read16_def_table\r |
788 | ldr r2, =m_read16_table\r |
789 | ldr r12, [r3, r1, lsl #2]\r |
790 | str r12, [r2, r0, lsl #2]\r |
791 | \r |
792 | ldr r3, =m_read32_def_table\r |
793 | ldr r2, =m_read32_table\r |
794 | ldr r12, [r3, r1, lsl #2]\r |
795 | str r12, [r2, r0, lsl #2]\r |
796 | \r |
797 | bx lr\r |
721cd396 |
798 | \r |
e5503e2f |
799 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
800 | \r |
801 | @ Here we only handle most often used locations,\r |
802 | @ everything else is passed to generic handlers\r |
803 | \r |
804 | PicoWrite8: @ u32 a, u8 d\r |
805 | bic r0, r0, #0xff000000\r |
806 | and r2, r0, #0x00e00000\r |
807 | cmp r2, #0x00e00000 @ RAM?\r |
808 | ldr r3, =Pico\r |
809 | biceq r0, r0, #0x00ff0000\r |
810 | eoreq r0, r0, #1\r |
811 | streqb r1, [r3, r0]\r |
812 | bxeq lr\r |
813 | \r |
814 | m_m68k_write8_misc:\r |
815 | bic r2, r0, #0x1f @ most commonly we get i/o port write,\r |
816 | cmp r2, #0xa10000 @ so check for it first\r |
817 | bne m_write8_misc2\r |
818 | m_write8_io:\r |
819 | ldr r2, =PicoOpt\r |
820 | and r0, r0, #0x1e\r |
821 | ldr r2, [r2]\r |
822 | ldr r3, =(Pico+0x22000) @ Pico.ioports\r |
823 | tst r2, #0x20 @ 6 button pad?\r |
824 | streqb r1, [r3, r0, lsr #1]\r |
825 | bxeq lr\r |
826 | cmp r0, #2\r |
827 | cmpne r0, #4\r |
828 | bne m_write8_io_done @ not likely to happen\r |
829 | add r2, r3, #0x200 @ Pico+0x22200\r |
830 | mov r12,#0\r |
831 | cmp r0, #2\r |
832 | streqb r12,[r2,#0x18]\r |
833 | strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r |
834 | tst r1, #0x40 @ TH\r |
835 | beq m_write8_io_done\r |
836 | ldrb r12,[r3, r0, lsr #1]\r |
837 | tst r12,#0x40\r |
838 | bne m_write8_io_done\r |
839 | cmp r0, #2\r |
840 | ldreqb r12,[r2,#0x0a]\r |
841 | ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
842 | add r12,r12,#1\r |
843 | streqb r12,[r2,#0x0a]\r |
844 | strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
845 | m_write8_io_done:\r |
846 | strb r1, [r3, r0, lsr #1]\r |
847 | bx lr\r |
848 | \r |
849 | \r |
850 | m_write8_misc2:\r |
851 | and r2, r0, #0xff0000\r |
852 | cmp r2, #0xa00000 @ z80 area?\r |
853 | bne m_write8_not_z80\r |
854 | tst r0, #0x4000\r |
855 | bne m_write8_z80_not_ram\r |
856 | ldr r3, =(Pico+0x20000) @ Pico.zram\r |
857 | add r2, r3, #0x02200 @ Pico+0x22200\r |
858 | ldrb r2, [r2, #9] @ Pico.m.z80Run\r |
859 | bic r0, r0, #0xff0000\r |
860 | bic r0, r0, #0x00e000\r |
861 | tst r2, #1\r |
862 | streqb r1, [r3, r0] @ zram\r |
863 | bx lr\r |
864 | \r |
865 | m_write8_z80_not_ram:\r |
866 | and r2, r0, #0x6000\r |
867 | cmp r2, #0x4000\r |
868 | bne m_write8_z80_not_ym2612\r |
869 | ldr r2, =PicoOpt\r |
870 | and r0, r0, #3\r |
871 | ldr r2, [r2]\r |
872 | tst r2, #1\r |
873 | bxeq lr\r |
874 | stmfd sp!,{lr}\r |
875 | .if EXTERNAL_YM2612\r |
876 | tst r2, #0x200\r |
877 | ldreq r2, =YM2612Write_\r |
878 | ldrne r2, =YM2612Write_940\r |
879 | mov lr, pc\r |
880 | bx r2\r |
881 | .else\r |
882 | bl YM2612Write_\r |
883 | .endif\r |
884 | ldr r2, =emustatus\r |
885 | ldmfd sp!,{lr}\r |
886 | ldr r1, [r2]\r |
887 | orr r1, r0, r2\r |
888 | str r1, [r2] @ emustatus|=YM2612Write(a&3, d);\r |
889 | bx lr\r |
890 | \r |
891 | m_write8_z80_not_ym2612: @ not too likely\r |
892 | mov r2, r0, lsl #17\r |
893 | bic r2, r2, #6<<17\r |
894 | mov r3, #0x7f00\r |
895 | orr r3, r3, #0x0011\r |
896 | cmp r3, r2, lsr #17 @ psg @ z80 area?\r |
897 | beq m_write8_psg\r |
898 | and r2, r0, #0x7f00\r |
899 | cmp r2, #0x6000 @ bank register?\r |
900 | bxne lr @ invalid write\r |
901 | \r |
902 | m_write8_z80_bank_reg:\r |
903 | ldr r3, =(Pico+0x22208) @ Pico.m\r |
904 | ldrh r2, [r3, #0x0a]\r |
905 | mov r1, r1, lsr #8\r |
906 | orr r2, r1, r2, lsr #1\r |
907 | bic r2, r2, #0xfe00\r |
908 | strh r2, [r3, #0x0a]\r |
909 | bx lr\r |
910 | \r |
911 | \r |
912 | m_write8_not_z80:\r |
913 | and r2, r0, #0xe70000\r |
914 | cmp r2, #0xc00000 @ VDP area?\r |
bf537655 |
915 | bne OtherWrite8 @ passthrough\r |
e5503e2f |
916 | and r2, r0, #0xf9\r |
917 | cmp r2, #0x11\r |
bf537655 |
918 | bne OtherWrite8\r |
e5503e2f |
919 | m_write8_psg:\r |
920 | ldr r2, =PicoOpt\r |
921 | mov r0, r1\r |
922 | ldr r2, [r2]\r |
923 | tst r2, #2\r |
924 | bxeq lr\r |
bf537655 |
925 | b SN76496Write\r |
e5503e2f |
926 | \r |