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 |
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13 | .align 4\r |
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14 | \r |
15 | @ default jump tables\r |
16 | \r |
17 | m_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 |
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26 | .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks\r |
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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 |
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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 |
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44 | .long m_read8_vdp @ 0xD00000 - 0xD7FFFF\r |
45 | .long m_read8_vdp @ 0xD80000 - 0xDFFFFF\r |
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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 |
51 | m_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 |
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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 |
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77 | .long m_read16_vdp @ 0xC80000 - 0xCFFFFF\r |
78 | .long m_read16_vdp @ 0xD00000 - 0xD7FFFF\r |
79 | .long m_read16_vdp @ 0xD80000 - 0xDFFFFF\r |
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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 |
85 | m_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 |
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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 |
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123 | .align 4\r |
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124 | @.section .bss, "brw"\r |
125 | @.data\r |
126 | \r |
127 | @ used tables\r |
128 | m_read8_table:\r |
129 | .skip 32*4\r |
130 | \r |
131 | m_read16_table:\r |
132 | .skip 32*4\r |
133 | \r |
134 | m_read32_table:\r |
135 | .skip 32*4\r |
136 | \r |
137 | \r |
138 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
139 | \r |
140 | .text\r |
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141 | .align 4\r |
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142 | \r |
143 | .global PicoMemReset\r |
144 | .global PicoRead8\r |
145 | .global PicoRead16\r |
146 | .global PicoRead32\r |
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147 | .global PicoWrite8\r |
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148 | .global PicoWriteRomHW_SSF2\r |
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149 | .global m_m68k_read8_misc\r |
150 | .global m_m68k_write8_misc\r |
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151 | \r |
152 | \r |
153 | PicoMemReset:\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 |
163 | 1:\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 |
172 | 1:\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 |
181 | 1:\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 |
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190 | mov r2, #20\r |
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191 | 1:\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 |
199 | 2:\r |
200 | ldr r1, =m_read16_above_rom\r |
201 | ldr r0, =m_read16_table\r |
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202 | mov r2, #20\r |
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203 | 1:\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 |
211 | 2:\r |
212 | ldr r1, =m_read32_above_rom\r |
213 | ldr r0, =m_read32_table\r |
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214 | mov r2, #20\r |
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215 | 1:\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 |
223 | 2:\r |
224 | bx lr\r |
225 | \r |
226 | .pool\r |
227 | \r |
228 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
229 | \r |
230 | PicoRead8: @ 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 |
236 | PicoRead16: @ 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 |
242 | PicoRead32: @ 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 |
252 | m_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 |
270 | m_read8_rom0: @ 0x000000 - 0x07ffff\r |
271 | m_read8_rom 0\r |
272 | \r |
273 | m_read8_rom1: @ 0x080000 - 0x0fffff\r |
274 | m_read8_rom 1\r |
275 | \r |
276 | m_read8_rom2: @ 0x100000 - 0x17ffff\r |
277 | m_read8_rom 2\r |
278 | \r |
279 | m_read8_rom3: @ 0x180000 - 0x1fffff\r |
280 | m_read8_rom 3\r |
281 | \r |
282 | m_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 |
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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 |
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296 | m_read8_nosram:\r |
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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 |
306 | m_read8_rom5: @ 0x280000 - 0x2fffff\r |
307 | m_read8_rom 5\r |
308 | \r |
309 | m_read8_rom6: @ 0x300000 - 0x37ffff\r |
310 | m_read8_rom 6\r |
311 | \r |
312 | m_read8_rom7: @ 0x380000 - 0x3fffff\r |
313 | m_read8_rom 7\r |
314 | \r |
315 | m_read8_rom8: @ 0x400000 - 0x47ffff\r |
316 | m_read8_rom 8\r |
317 | \r |
318 | m_read8_rom9: @ 0x480000 - 0x4fffff\r |
319 | m_read8_rom 9\r |
320 | \r |
cc68a136 |
321 | m_read8_romA: @ 0x500000 - 0x57ffff\r |
322 | m_read8_rom 0xA\r |
323 | \r |
324 | m_read8_romB: @ 0x580000 - 0x5fffff\r |
325 | m_read8_rom 0xB\r |
326 | \r |
327 | m_read8_romC: @ 0x600000 - 0x67ffff\r |
328 | m_read8_rom 0xC\r |
329 | \r |
330 | m_read8_romD: @ 0x680000 - 0x6fffff\r |
331 | m_read8_rom 0xD\r |
332 | \r |
333 | m_read8_romE: @ 0x700000 - 0x77ffff\r |
334 | m_read8_rom 0xE\r |
335 | \r |
336 | m_read8_romF: @ 0x780000 - 0x7fffff\r |
337 | m_read8_rom 0xF\r |
338 | \r |
29a95187 |
339 | m_read8_rom10: @ 0x800000 - 0x87ffff\r |
340 | m_read8_rom 0x10\r |
341 | \r |
342 | m_read8_rom11: @ 0x880000 - 0x8fffff\r |
343 | m_read8_rom 0x11\r |
344 | \r |
345 | m_read8_rom12: @ 0x900000 - 0x97ffff\r |
346 | m_read8_rom 0x12\r |
347 | \r |
348 | m_read8_rom13: @ 0x980000 - 0x9fffff\r |
349 | m_read8_rom 0x13\r |
350 | \r |
e5503e2f |
351 | \r |
352 | m_m68k_read8_misc:\r |
cc68a136 |
353 | m_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 |
357 | m_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 |
369 | m_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 |
374 | m_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 |
e5503e2f |
389 | ldr r1, =PicoOpt\r |
390 | ldr r1, [r1]\r |
391 | tst r1, #1\r |
43e6eaad |
392 | bne ym2612_read_local_68k\r |
e5503e2f |
393 | \r |
394 | m_read8_fake_ym2612:\r |
395 | ldr r3, =(Pico+0x22200)\r |
396 | ldrb r0, [r3, #8] @ Pico.m.rotate\r |
397 | add r1, r0, #1\r |
398 | strb r1, [r3, #8]\r |
399 | and r0, r0, #3\r |
400 | bx lr\r |
401 | \r |
402 | m_read8_misc3:\r |
403 | @ if everything else fails, use generic handler\r |
cc68a136 |
404 | stmfd sp!,{r0,lr}\r |
405 | bic r0, r0, #1\r |
406 | mov r1, #8\r |
407 | bl OtherRead16\r |
408 | ldmfd sp!,{r1,lr}\r |
409 | tst r1, #1\r |
410 | moveq r0, r0, lsr #8\r |
411 | bx lr\r |
412 | \r |
e5503e2f |
413 | \r |
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414 | m_read8_vdp:\r |
415 | tst r0, #0x70000\r |
416 | tsteq r0, #0x000e0\r |
417 | bxne lr @ invalid read\r |
418 | stmfd sp!,{r0,lr}\r |
419 | bic r0, r0, #1\r |
420 | bl PicoVideoRead\r |
421 | ldmfd sp!,{r1,lr}\r |
422 | tst r1, #1\r |
423 | moveq r0, r0, lsr #8\r |
424 | bx lr\r |
425 | \r |
426 | m_read8_ram:\r |
427 | ldr r1, =Pico\r |
428 | bic r0, r0, #0xff0000\r |
429 | eor r0, r0, #1\r |
430 | ldrb r0, [r1, r0]\r |
431 | bx lr\r |
432 | \r |
433 | m_read8_above_rom:\r |
1dceadae |
434 | @ might still be SRam (Micro Machines, HardBall '95)\r |
435 | ldr r2, =(SRam)\r |
436 | ldr r3, =(Pico+0x22200)\r |
437 | ldr r1, [r2, #8] @ SRam.end\r |
438 | cmp r0, r1\r |
439 | bgt m_read8_ar_nosram\r |
440 | ldr r1, [r2, #4] @ SRam.start\r |
441 | cmp r0, r1\r |
442 | blt m_read8_ar_nosram\r |
443 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
444 | tst r1, #5\r |
445 | bne SRAMRead\r |
446 | m_read8_ar_nosram:\r |
0ffefdb8 |
447 | ldr r2, =PicoRead16Hook\r |
cc68a136 |
448 | stmfd sp!,{r0,lr}\r |
0ffefdb8 |
449 | ldr r2, [r2]\r |
cc68a136 |
450 | bic r0, r0, #1\r |
451 | mov r1, #8\r |
0ffefdb8 |
452 | mov lr, pc\r |
453 | bx r2\r |
cc68a136 |
454 | ldmfd sp!,{r1,lr}\r |
455 | tst r1, #1\r |
456 | moveq r0, r0, lsr #8\r |
457 | bx lr\r |
458 | \r |
459 | .pool\r |
460 | \r |
461 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
462 | \r |
463 | .macro m_read16_rom sect\r |
464 | ldr r1, =(Pico+0x22200)\r |
465 | bic r0, r0, #0xf80000\r |
466 | ldr r1, [r1]\r |
467 | bic r0, r0, #1\r |
468 | .if \sect\r |
469 | orr r0, r0, #0x080000*\sect\r |
470 | .endif\r |
471 | ldrh r0, [r1, r0]\r |
472 | bx lr\r |
473 | .endm\r |
474 | \r |
475 | \r |
476 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
477 | m_read16_rom 0\r |
478 | \r |
479 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
480 | m_read16_rom 1\r |
481 | \r |
482 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
483 | m_read16_rom 2\r |
484 | \r |
485 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
486 | m_read16_rom 3\r |
487 | \r |
488 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
489 | ldr r2, =(SRam)\r |
490 | ldr r3, =(Pico+0x22200)\r |
491 | ldr r1, [r2, #8] @ SRam.end\r |
492 | bic r0, r0, #0xf80000\r |
493 | bic r0, r0, #1\r |
494 | orr r0, r0, #0x200000\r |
495 | cmp r0, r1\r |
496 | bgt m_read16_nosram\r |
7969166e |
497 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
498 | cmp r0, r1\r |
499 | blt m_read16_nosram\r |
7969166e |
500 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
501 | tst r1, #5\r |
502 | beq m_read16_nosram\r |
503 | stmfd sp!,{lr}\r |
9dc09829 |
504 | bl SRAMRead16\r |
7969166e |
505 | ldmfd sp!,{pc}\r |
cc68a136 |
506 | m_read16_nosram:\r |
7969166e |
507 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
508 | cmp r0, r1\r |
509 | movgt r0, #0\r |
510 | bxgt lr @ bad location\r |
511 | ldr r1, [r3] @ 1ci\r |
512 | ldrh r0, [r1, r0]\r |
513 | bx lr\r |
514 | \r |
515 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
516 | m_read16_rom 5\r |
517 | \r |
518 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
519 | m_read16_rom 6\r |
520 | \r |
521 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
522 | m_read16_rom 7\r |
523 | \r |
524 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
525 | m_read16_rom 8\r |
526 | \r |
527 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
528 | m_read16_rom 9\r |
529 | \r |
cc68a136 |
530 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
531 | m_read16_rom 0xA\r |
532 | \r |
533 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
534 | m_read16_rom 0xB\r |
535 | \r |
536 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
537 | m_read16_rom 0xC\r |
538 | \r |
539 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
540 | m_read16_rom 0xD\r |
541 | \r |
542 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
543 | m_read16_rom 0xE\r |
544 | \r |
545 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
546 | m_read16_rom 0xF\r |
547 | \r |
29a95187 |
548 | m_read16_rom10: @ 0x800000 - 0x87ffff\r |
549 | m_read16_rom 0x10\r |
550 | \r |
551 | m_read16_rom11: @ 0x880000 - 0x8fffff\r |
552 | m_read16_rom 0x11\r |
553 | \r |
554 | m_read16_rom12: @ 0x900000 - 0x97ffff\r |
555 | m_read16_rom 0x12\r |
556 | \r |
557 | m_read16_rom13: @ 0x980000 - 0x9fffff\r |
558 | m_read16_rom 0x13\r |
559 | \r |
cc68a136 |
560 | m_read16_misc:\r |
cc68a136 |
561 | bic r0, r0, #1\r |
4ff2d527 |
562 | mov r1, #16\r |
563 | b OtherRead16\r |
cc68a136 |
564 | \r |
565 | m_read16_vdp:\r |
7969166e |
566 | tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r |
cc68a136 |
567 | tsteq r0, #0x000e0\r |
568 | bxne lr @ invalid read\r |
cc68a136 |
569 | bic r0, r0, #1\r |
4ff2d527 |
570 | b PicoVideoRead\r |
cc68a136 |
571 | \r |
572 | m_read16_ram:\r |
573 | ldr r1, =Pico\r |
574 | bic r0, r0, #0xff0000\r |
575 | bic r0, r0, #1\r |
576 | ldrh r0, [r1, r0]\r |
577 | bx lr\r |
578 | \r |
579 | m_read16_above_rom:\r |
1dceadae |
580 | @ might still be SRam\r |
581 | ldr r2, =(SRam)\r |
582 | ldr r3, =(Pico+0x22200)\r |
583 | ldr r1, [r2, #8] @ SRam.end\r |
cc68a136 |
584 | bic r0, r0, #1\r |
1dceadae |
585 | cmp r0, r1\r |
586 | bgt m_read16_ar_nosram\r |
587 | ldr r1, [r2, #4] @ SRam.start\r |
588 | cmp r0, r1\r |
589 | blt m_read16_ar_nosram\r |
590 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
591 | tst r1, #5\r |
592 | beq m_read16_ar_nosram\r |
593 | stmfd sp!,{lr}\r |
9dc09829 |
594 | bl SRAMRead16\r |
1dceadae |
595 | ldmfd sp!,{pc}\r |
596 | m_read16_ar_nosram:\r |
0ffefdb8 |
597 | ldr r2, =PicoRead16Hook\r |
598 | ldr r2, [r2]\r |
4ff2d527 |
599 | mov r1, #16\r |
0ffefdb8 |
600 | bx r2\r |
cc68a136 |
601 | \r |
602 | .pool\r |
603 | \r |
604 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
605 | \r |
606 | .macro m_read32_rom sect\r |
607 | ldr r1, =(Pico+0x22200)\r |
608 | bic r0, r0, #0xf80000\r |
609 | ldr r1, [r1]\r |
610 | bic r0, r0, #1\r |
611 | .if \sect\r |
612 | orr r0, r0, #0x080000*\sect\r |
613 | .endif\r |
614 | ldrh r0, [r1, r0]!\r |
615 | ldrh r1, [r1, #2] @ 1ci\r |
616 | orr r0, r1, r0, lsl #16\r |
617 | bx lr\r |
618 | .endm\r |
619 | \r |
620 | \r |
621 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
622 | m_read32_rom 0\r |
623 | \r |
624 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
625 | m_read32_rom 1\r |
626 | \r |
627 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
628 | m_read32_rom 2\r |
629 | \r |
630 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
631 | m_read32_rom 3\r |
632 | \r |
633 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
634 | ldr r2, =(SRam)\r |
635 | ldr r3, =(Pico+0x22200)\r |
636 | ldr r1, [r2, #8] @ SRam.end\r |
637 | bic r0, r0, #0xf80000\r |
638 | bic r0, r0, #1\r |
639 | orr r0, r0, #0x200000\r |
640 | cmp r0, r1\r |
641 | bgt m_read32_nosram\r |
7969166e |
642 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
643 | cmp r0, r1\r |
644 | blt m_read32_nosram\r |
7969166e |
645 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
646 | tst r1, #5\r |
647 | beq m_read32_nosram\r |
648 | stmfd sp!,{r0,lr}\r |
9dc09829 |
649 | bl SRAMRead16\r |
7969166e |
650 | ldmfd sp!,{r1,lr}\r |
651 | stmfd sp!,{r0,lr}\r |
652 | add r0, r1, #2\r |
9dc09829 |
653 | bl SRAMRead16\r |
7969166e |
654 | ldmfd sp!,{r1,lr}\r |
3ec29f01 |
655 | orr r0, r0, r1, lsl #16\r |
cc68a136 |
656 | bx lr\r |
657 | m_read32_nosram:\r |
7969166e |
658 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
659 | cmp r0, r1\r |
660 | movgt r0, #0\r |
661 | bxgt lr @ bad location\r |
662 | ldr r1, [r3] @ (1ci)\r |
663 | ldrh r0, [r1, r0]!\r |
664 | ldrh r1, [r1, #2] @ (2ci)\r |
665 | orr r0, r1, r0, lsl #16\r |
666 | bx lr\r |
667 | \r |
668 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
669 | m_read32_rom 5\r |
670 | \r |
671 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
672 | m_read32_rom 6\r |
673 | \r |
674 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
675 | m_read32_rom 7\r |
676 | \r |
677 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
678 | m_read32_rom 8\r |
679 | \r |
680 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
681 | m_read32_rom 9\r |
682 | \r |
cc68a136 |
683 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
684 | m_read32_rom 0xA\r |
685 | \r |
686 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
687 | m_read32_rom 0xB\r |
688 | \r |
689 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
690 | m_read32_rom 0xC\r |
691 | \r |
692 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
693 | m_read32_rom 0xD\r |
694 | \r |
695 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
696 | m_read32_rom 0xE\r |
697 | \r |
698 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
699 | m_read32_rom 0xF\r |
700 | \r |
29a95187 |
701 | m_read32_rom10: @ 0x800000 - 0x87ffff\r |
702 | m_read32_rom 0x10\r |
703 | \r |
704 | m_read32_rom11: @ 0x880000 - 0x8fffff\r |
705 | m_read32_rom 0x11\r |
706 | \r |
707 | m_read32_rom12: @ 0x900000 - 0x97ffff\r |
708 | m_read32_rom 0x12\r |
709 | \r |
710 | m_read32_rom13: @ 0x980000 - 0x9fffff\r |
711 | m_read32_rom 0x13\r |
712 | \r |
cc68a136 |
713 | m_read32_misc:\r |
714 | bic r0, r0, #1\r |
715 | stmfd sp!,{r0,lr}\r |
716 | mov r1, #32\r |
717 | bl OtherRead16\r |
718 | mov r1, r0\r |
719 | ldmfd sp!,{r0}\r |
720 | stmfd sp!,{r1}\r |
721 | add r0, r0, #2\r |
722 | mov r1, #32\r |
723 | bl OtherRead16\r |
724 | ldmfd sp!,{r1,lr}\r |
725 | orr r0, r0, r1, lsl #16\r |
726 | bx lr\r |
727 | \r |
728 | m_read32_vdp:\r |
729 | tst r0, #0x70000\r |
730 | tsteq r0, #0x000e0\r |
731 | bxne lr @ invalid read\r |
732 | bic r0, r0, #1\r |
4ff2d527 |
733 | add r1, r0, #2\r |
734 | stmfd sp!,{r1,lr}\r |
cc68a136 |
735 | bl PicoVideoRead\r |
4ff2d527 |
736 | swp r0, r0, [sp]\r |
cc68a136 |
737 | bl PicoVideoRead\r |
738 | ldmfd sp!,{r1,lr}\r |
739 | orr r0, r0, r1, lsl #16\r |
740 | bx lr\r |
741 | \r |
742 | m_read32_ram:\r |
743 | ldr r1, =Pico\r |
744 | bic r0, r0, #0xff0000\r |
745 | bic r0, r0, #1\r |
746 | ldrh r0, [r1, r0]!\r |
747 | ldrh r1, [r1, #2] @ 2ci\r |
748 | orr r0, r1, r0, lsl #16\r |
749 | bx lr\r |
750 | \r |
751 | m_read32_above_rom:\r |
0ffefdb8 |
752 | ldr r2, =PicoRead16Hook\r |
cc68a136 |
753 | bic r0, r0, #1\r |
0ffefdb8 |
754 | ldr r2, [r2]\r |
cc68a136 |
755 | mov r1, #32\r |
0ffefdb8 |
756 | stmfd sp!,{r0,r2,lr}\r |
757 | mov lr, pc\r |
758 | bx r2\r |
cc68a136 |
759 | mov r1, r0\r |
0ffefdb8 |
760 | ldmfd sp!,{r0,r2}\r |
cc68a136 |
761 | stmfd sp!,{r1}\r |
762 | add r0, r0, #2\r |
763 | mov r1, #32\r |
0ffefdb8 |
764 | mov lr, pc\r |
765 | bx r2\r |
cc68a136 |
766 | ldmfd sp!,{r1,lr}\r |
767 | orr r0, r0, r1, lsl #16\r |
768 | bx lr\r |
769 | \r |
770 | .pool\r |
771 | \r |
772 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
773 | \r |
774 | PicoWriteRomHW_SSF2: @ u32 a, u32 d\r |
775 | and r0, r0, #0xe\r |
776 | movs r0, r0, lsr #1\r |
777 | bne pwr_banking\r |
778 | \r |
779 | @ sram register\r |
780 | ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r |
721cd396 |
781 | ldrb r0, [r2]\r |
cc68a136 |
782 | and r1, r1, #3\r |
721cd396 |
783 | bic r0, r0, #3\r |
784 | orr r0, r0, r1\r |
785 | strb r0, [r2]\r |
cc68a136 |
786 | bx lr\r |
787 | \r |
788 | pwr_banking:\r |
789 | and r1, r1, #0x1f\r |
790 | \r |
791 | ldr r3, =m_read8_def_table\r |
792 | ldr r2, =m_read8_table\r |
793 | ldr r12, [r3, r1, lsl #2]\r |
794 | str r12, [r2, r0, lsl #2]\r |
795 | \r |
796 | ldr r3, =m_read16_def_table\r |
797 | ldr r2, =m_read16_table\r |
798 | ldr r12, [r3, r1, lsl #2]\r |
799 | str r12, [r2, r0, lsl #2]\r |
800 | \r |
801 | ldr r3, =m_read32_def_table\r |
802 | ldr r2, =m_read32_table\r |
803 | ldr r12, [r3, r1, lsl #2]\r |
804 | str r12, [r2, r0, lsl #2]\r |
805 | \r |
806 | bx lr\r |
721cd396 |
807 | \r |
e5503e2f |
808 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
809 | \r |
810 | @ Here we only handle most often used locations,\r |
811 | @ everything else is passed to generic handlers\r |
812 | \r |
813 | PicoWrite8: @ u32 a, u8 d\r |
814 | bic r0, r0, #0xff000000\r |
815 | and r2, r0, #0x00e00000\r |
816 | cmp r2, #0x00e00000 @ RAM?\r |
817 | ldr r3, =Pico\r |
818 | biceq r0, r0, #0x00ff0000\r |
819 | eoreq r0, r0, #1\r |
820 | streqb r1, [r3, r0]\r |
821 | bxeq lr\r |
822 | \r |
823 | m_m68k_write8_misc:\r |
824 | bic r2, r0, #0x1f @ most commonly we get i/o port write,\r |
825 | cmp r2, #0xa10000 @ so check for it first\r |
826 | bne m_write8_misc2\r |
827 | m_write8_io:\r |
828 | ldr r2, =PicoOpt\r |
829 | and r0, r0, #0x1e\r |
830 | ldr r2, [r2]\r |
831 | ldr r3, =(Pico+0x22000) @ Pico.ioports\r |
832 | tst r2, #0x20 @ 6 button pad?\r |
833 | streqb r1, [r3, r0, lsr #1]\r |
834 | bxeq lr\r |
835 | cmp r0, #2\r |
836 | cmpne r0, #4\r |
837 | bne m_write8_io_done @ not likely to happen\r |
838 | add r2, r3, #0x200 @ Pico+0x22200\r |
839 | mov r12,#0\r |
840 | cmp r0, #2\r |
841 | streqb r12,[r2,#0x18]\r |
842 | strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r |
843 | tst r1, #0x40 @ TH\r |
844 | beq m_write8_io_done\r |
845 | ldrb r12,[r3, r0, lsr #1]\r |
846 | tst r12,#0x40\r |
847 | bne m_write8_io_done\r |
848 | cmp r0, #2\r |
849 | ldreqb r12,[r2,#0x0a]\r |
850 | ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
851 | add r12,r12,#1\r |
852 | streqb r12,[r2,#0x0a]\r |
853 | strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
854 | m_write8_io_done:\r |
855 | strb r1, [r3, r0, lsr #1]\r |
856 | bx lr\r |
857 | \r |
858 | \r |
859 | m_write8_misc2:\r |
860 | and r2, r0, #0xff0000\r |
861 | cmp r2, #0xa00000 @ z80 area?\r |
862 | bne m_write8_not_z80\r |
863 | tst r0, #0x4000\r |
864 | bne m_write8_z80_not_ram\r |
865 | ldr r3, =(Pico+0x20000) @ Pico.zram\r |
866 | add r2, r3, #0x02200 @ Pico+0x22200\r |
867 | ldrb r2, [r2, #9] @ Pico.m.z80Run\r |
868 | bic r0, r0, #0xff0000\r |
869 | bic r0, r0, #0x00e000\r |
870 | tst r2, #1\r |
760e26c7 |
871 | ldr r2, =SekCycleCnt\r |
e5503e2f |
872 | streqb r1, [r3, r0] @ zram\r |
760e26c7 |
873 | ldr r0, [r2]\r |
874 | add r0, r0, #2 @ hack?\r |
875 | str r0, [r2]\r |
e5503e2f |
876 | bx lr\r |
877 | \r |
878 | m_write8_z80_not_ram:\r |
879 | and r2, r0, #0x6000\r |
880 | cmp r2, #0x4000\r |
881 | bne m_write8_z80_not_ym2612\r |
4b9c5888 |
882 | ldr r3, =PicoOpt\r |
e5503e2f |
883 | and r0, r0, #3\r |
4b9c5888 |
884 | ldr r3, [r3]\r |
885 | mov r2, #0 @ is_from_z80 = 0\r |
886 | tst r3, #1\r |
e5503e2f |
887 | bxeq lr\r |
888 | stmfd sp!,{lr}\r |
4b9c5888 |
889 | and r1, r1, #0xff\r |
890 | bl ym2612_write_local\r |
e5503e2f |
891 | ldr r2, =emustatus\r |
892 | ldmfd sp!,{lr}\r |
893 | ldr r1, [r2]\r |
471484e4 |
894 | and r0, r0, #1\r |
895 | orr r1, r0, r1\r |
4b9c5888 |
896 | str r1, [r2] @ emustatus|=ym2612_write_local(a&3, d);\r |
e5503e2f |
897 | bx lr\r |
898 | \r |
899 | m_write8_z80_not_ym2612: @ not too likely\r |
900 | mov r2, r0, lsl #17\r |
901 | bic r2, r2, #6<<17\r |
902 | mov r3, #0x7f00\r |
903 | orr r3, r3, #0x0011\r |
904 | cmp r3, r2, lsr #17 @ psg @ z80 area?\r |
905 | beq m_write8_psg\r |
906 | and r2, r0, #0x7f00\r |
907 | cmp r2, #0x6000 @ bank register?\r |
908 | bxne lr @ invalid write\r |
909 | \r |
910 | m_write8_z80_bank_reg:\r |
911 | ldr r3, =(Pico+0x22208) @ Pico.m\r |
912 | ldrh r2, [r3, #0x0a]\r |
4b9c5888 |
913 | mov r1, r1, lsl #8\r |
e5503e2f |
914 | orr r2, r1, r2, lsr #1\r |
915 | bic r2, r2, #0xfe00\r |
916 | strh r2, [r3, #0x0a]\r |
917 | bx lr\r |
918 | \r |
919 | \r |
920 | m_write8_not_z80:\r |
921 | and r2, r0, #0xe70000\r |
922 | cmp r2, #0xc00000 @ VDP area?\r |
bf537655 |
923 | bne OtherWrite8 @ passthrough\r |
e5503e2f |
924 | and r2, r0, #0xf9\r |
925 | cmp r2, #0x11\r |
bf537655 |
926 | bne OtherWrite8\r |
e5503e2f |
927 | m_write8_psg:\r |
928 | ldr r2, =PicoOpt\r |
4b9c5888 |
929 | and r0, r1, #0xff\r |
e5503e2f |
930 | ldr r2, [r2]\r |
931 | tst r2, #2\r |
932 | bxeq lr\r |
bf537655 |
933 | b SN76496Write\r |
e5503e2f |
934 | \r |