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 |
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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 |
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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 |
c060a9ab |
389 | b ym2612_read_local_68k\r |
e5503e2f |
390 | \r |
391 | m_read8_fake_ym2612:\r |
392 | ldr r3, =(Pico+0x22200)\r |
393 | ldrb r0, [r3, #8] @ Pico.m.rotate\r |
394 | add r1, r0, #1\r |
395 | strb r1, [r3, #8]\r |
396 | and r0, r0, #3\r |
397 | bx lr\r |
398 | \r |
399 | m_read8_misc3:\r |
400 | @ if everything else fails, use generic handler\r |
cc68a136 |
401 | stmfd sp!,{r0,lr}\r |
402 | bic r0, r0, #1\r |
403 | mov r1, #8\r |
404 | bl OtherRead16\r |
405 | ldmfd sp!,{r1,lr}\r |
406 | tst r1, #1\r |
407 | moveq r0, r0, lsr #8\r |
408 | bx lr\r |
409 | \r |
e5503e2f |
410 | \r |
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411 | m_read8_vdp:\r |
412 | tst r0, #0x70000\r |
413 | tsteq r0, #0x000e0\r |
414 | bxne lr @ invalid read\r |
9761a7d0 |
415 | b PicoVideoRead8\r |
cc68a136 |
416 | \r |
417 | m_read8_ram:\r |
418 | ldr r1, =Pico\r |
419 | bic r0, r0, #0xff0000\r |
420 | eor r0, r0, #1\r |
421 | ldrb r0, [r1, r0]\r |
422 | bx lr\r |
423 | \r |
424 | m_read8_above_rom:\r |
1dceadae |
425 | @ might still be SRam (Micro Machines, HardBall '95)\r |
426 | ldr r2, =(SRam)\r |
427 | ldr r3, =(Pico+0x22200)\r |
428 | ldr r1, [r2, #8] @ SRam.end\r |
429 | cmp r0, r1\r |
430 | bgt m_read8_ar_nosram\r |
431 | ldr r1, [r2, #4] @ SRam.start\r |
432 | cmp r0, r1\r |
433 | blt m_read8_ar_nosram\r |
434 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
435 | tst r1, #5\r |
436 | bne SRAMRead\r |
437 | m_read8_ar_nosram:\r |
0ffefdb8 |
438 | ldr r2, =PicoRead16Hook\r |
cc68a136 |
439 | stmfd sp!,{r0,lr}\r |
0ffefdb8 |
440 | ldr r2, [r2]\r |
cc68a136 |
441 | bic r0, r0, #1\r |
442 | mov r1, #8\r |
0ffefdb8 |
443 | mov lr, pc\r |
444 | bx r2\r |
cc68a136 |
445 | ldmfd sp!,{r1,lr}\r |
446 | tst r1, #1\r |
447 | moveq r0, r0, lsr #8\r |
448 | bx lr\r |
449 | \r |
450 | .pool\r |
451 | \r |
452 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
453 | \r |
454 | .macro m_read16_rom sect\r |
455 | ldr r1, =(Pico+0x22200)\r |
456 | bic r0, r0, #0xf80000\r |
457 | ldr r1, [r1]\r |
458 | bic r0, r0, #1\r |
459 | .if \sect\r |
460 | orr r0, r0, #0x080000*\sect\r |
461 | .endif\r |
462 | ldrh r0, [r1, r0]\r |
463 | bx lr\r |
464 | .endm\r |
465 | \r |
466 | \r |
467 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
468 | m_read16_rom 0\r |
469 | \r |
470 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
471 | m_read16_rom 1\r |
472 | \r |
473 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
474 | m_read16_rom 2\r |
475 | \r |
476 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
477 | m_read16_rom 3\r |
478 | \r |
479 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
480 | ldr r2, =(SRam)\r |
481 | ldr r3, =(Pico+0x22200)\r |
482 | ldr r1, [r2, #8] @ SRam.end\r |
483 | bic r0, r0, #0xf80000\r |
484 | bic r0, r0, #1\r |
485 | orr r0, r0, #0x200000\r |
486 | cmp r0, r1\r |
487 | bgt m_read16_nosram\r |
7969166e |
488 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
489 | cmp r0, r1\r |
490 | blt m_read16_nosram\r |
7969166e |
491 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
492 | tst r1, #5\r |
493 | beq m_read16_nosram\r |
494 | stmfd sp!,{lr}\r |
9dc09829 |
495 | bl SRAMRead16\r |
7969166e |
496 | ldmfd sp!,{pc}\r |
cc68a136 |
497 | m_read16_nosram:\r |
7969166e |
498 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
499 | cmp r0, r1\r |
500 | movgt r0, #0\r |
501 | bxgt lr @ bad location\r |
502 | ldr r1, [r3] @ 1ci\r |
503 | ldrh r0, [r1, r0]\r |
504 | bx lr\r |
505 | \r |
506 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
507 | m_read16_rom 5\r |
508 | \r |
509 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
510 | m_read16_rom 6\r |
511 | \r |
512 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
513 | m_read16_rom 7\r |
514 | \r |
515 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
516 | m_read16_rom 8\r |
517 | \r |
518 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
519 | m_read16_rom 9\r |
520 | \r |
cc68a136 |
521 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
522 | m_read16_rom 0xA\r |
523 | \r |
524 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
525 | m_read16_rom 0xB\r |
526 | \r |
527 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
528 | m_read16_rom 0xC\r |
529 | \r |
530 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
531 | m_read16_rom 0xD\r |
532 | \r |
533 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
534 | m_read16_rom 0xE\r |
535 | \r |
536 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
537 | m_read16_rom 0xF\r |
538 | \r |
29a95187 |
539 | m_read16_rom10: @ 0x800000 - 0x87ffff\r |
540 | m_read16_rom 0x10\r |
541 | \r |
542 | m_read16_rom11: @ 0x880000 - 0x8fffff\r |
543 | m_read16_rom 0x11\r |
544 | \r |
545 | m_read16_rom12: @ 0x900000 - 0x97ffff\r |
546 | m_read16_rom 0x12\r |
547 | \r |
548 | m_read16_rom13: @ 0x980000 - 0x9fffff\r |
549 | m_read16_rom 0x13\r |
550 | \r |
cc68a136 |
551 | m_read16_misc:\r |
cc68a136 |
552 | bic r0, r0, #1\r |
4ff2d527 |
553 | mov r1, #16\r |
554 | b OtherRead16\r |
cc68a136 |
555 | \r |
556 | m_read16_vdp:\r |
7969166e |
557 | tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r |
cc68a136 |
558 | tsteq r0, #0x000e0\r |
559 | bxne lr @ invalid read\r |
cc68a136 |
560 | bic r0, r0, #1\r |
4ff2d527 |
561 | b PicoVideoRead\r |
cc68a136 |
562 | \r |
563 | m_read16_ram:\r |
564 | ldr r1, =Pico\r |
565 | bic r0, r0, #0xff0000\r |
566 | bic r0, r0, #1\r |
567 | ldrh r0, [r1, r0]\r |
568 | bx lr\r |
569 | \r |
570 | m_read16_above_rom:\r |
1dceadae |
571 | @ might still be SRam\r |
572 | ldr r2, =(SRam)\r |
573 | ldr r3, =(Pico+0x22200)\r |
574 | ldr r1, [r2, #8] @ SRam.end\r |
cc68a136 |
575 | bic r0, r0, #1\r |
1dceadae |
576 | cmp r0, r1\r |
577 | bgt m_read16_ar_nosram\r |
578 | ldr r1, [r2, #4] @ SRam.start\r |
579 | cmp r0, r1\r |
580 | blt m_read16_ar_nosram\r |
581 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
582 | tst r1, #5\r |
583 | beq m_read16_ar_nosram\r |
584 | stmfd sp!,{lr}\r |
9dc09829 |
585 | bl SRAMRead16\r |
1dceadae |
586 | ldmfd sp!,{pc}\r |
587 | m_read16_ar_nosram:\r |
0ffefdb8 |
588 | ldr r2, =PicoRead16Hook\r |
589 | ldr r2, [r2]\r |
4ff2d527 |
590 | mov r1, #16\r |
0ffefdb8 |
591 | bx r2\r |
cc68a136 |
592 | \r |
593 | .pool\r |
594 | \r |
595 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
596 | \r |
597 | .macro m_read32_rom sect\r |
598 | ldr r1, =(Pico+0x22200)\r |
599 | bic r0, r0, #0xf80000\r |
600 | ldr r1, [r1]\r |
601 | bic r0, r0, #1\r |
602 | .if \sect\r |
603 | orr r0, r0, #0x080000*\sect\r |
604 | .endif\r |
605 | ldrh r0, [r1, r0]!\r |
606 | ldrh r1, [r1, #2] @ 1ci\r |
607 | orr r0, r1, r0, lsl #16\r |
608 | bx lr\r |
609 | .endm\r |
610 | \r |
611 | \r |
612 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
613 | m_read32_rom 0\r |
614 | \r |
615 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
616 | m_read32_rom 1\r |
617 | \r |
618 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
619 | m_read32_rom 2\r |
620 | \r |
621 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
622 | m_read32_rom 3\r |
623 | \r |
624 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
625 | ldr r2, =(SRam)\r |
626 | ldr r3, =(Pico+0x22200)\r |
627 | ldr r1, [r2, #8] @ SRam.end\r |
628 | bic r0, r0, #0xf80000\r |
629 | bic r0, r0, #1\r |
630 | orr r0, r0, #0x200000\r |
631 | cmp r0, r1\r |
632 | bgt m_read32_nosram\r |
7969166e |
633 | ldr r1, [r2, #4] @ SRam.start\r |
cc68a136 |
634 | cmp r0, r1\r |
635 | blt m_read32_nosram\r |
7969166e |
636 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
637 | tst r1, #5\r |
638 | beq m_read32_nosram\r |
639 | stmfd sp!,{r0,lr}\r |
9dc09829 |
640 | bl SRAMRead16\r |
7969166e |
641 | ldmfd sp!,{r1,lr}\r |
642 | stmfd sp!,{r0,lr}\r |
643 | add r0, r1, #2\r |
9dc09829 |
644 | bl SRAMRead16\r |
7969166e |
645 | ldmfd sp!,{r1,lr}\r |
3ec29f01 |
646 | orr r0, r0, r1, lsl #16\r |
cc68a136 |
647 | bx lr\r |
648 | m_read32_nosram:\r |
7969166e |
649 | ldr r1, [r3, #4] @ romsize\r |
cc68a136 |
650 | cmp r0, r1\r |
651 | movgt r0, #0\r |
652 | bxgt lr @ bad location\r |
653 | ldr r1, [r3] @ (1ci)\r |
654 | ldrh r0, [r1, r0]!\r |
655 | ldrh r1, [r1, #2] @ (2ci)\r |
656 | orr r0, r1, r0, lsl #16\r |
657 | bx lr\r |
658 | \r |
659 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
660 | m_read32_rom 5\r |
661 | \r |
662 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
663 | m_read32_rom 6\r |
664 | \r |
665 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
666 | m_read32_rom 7\r |
667 | \r |
668 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
669 | m_read32_rom 8\r |
670 | \r |
671 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
672 | m_read32_rom 9\r |
673 | \r |
cc68a136 |
674 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
675 | m_read32_rom 0xA\r |
676 | \r |
677 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
678 | m_read32_rom 0xB\r |
679 | \r |
680 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
681 | m_read32_rom 0xC\r |
682 | \r |
683 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
684 | m_read32_rom 0xD\r |
685 | \r |
686 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
687 | m_read32_rom 0xE\r |
688 | \r |
689 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
690 | m_read32_rom 0xF\r |
691 | \r |
29a95187 |
692 | m_read32_rom10: @ 0x800000 - 0x87ffff\r |
693 | m_read32_rom 0x10\r |
694 | \r |
695 | m_read32_rom11: @ 0x880000 - 0x8fffff\r |
696 | m_read32_rom 0x11\r |
697 | \r |
698 | m_read32_rom12: @ 0x900000 - 0x97ffff\r |
699 | m_read32_rom 0x12\r |
700 | \r |
701 | m_read32_rom13: @ 0x980000 - 0x9fffff\r |
702 | m_read32_rom 0x13\r |
703 | \r |
cc68a136 |
704 | m_read32_misc:\r |
705 | bic r0, r0, #1\r |
706 | stmfd sp!,{r0,lr}\r |
707 | mov r1, #32\r |
708 | bl OtherRead16\r |
709 | mov r1, r0\r |
710 | ldmfd sp!,{r0}\r |
711 | stmfd sp!,{r1}\r |
712 | add r0, r0, #2\r |
713 | mov r1, #32\r |
714 | bl OtherRead16\r |
715 | ldmfd sp!,{r1,lr}\r |
716 | orr r0, r0, r1, lsl #16\r |
717 | bx lr\r |
718 | \r |
719 | m_read32_vdp:\r |
720 | tst r0, #0x70000\r |
721 | tsteq r0, #0x000e0\r |
722 | bxne lr @ invalid read\r |
723 | bic r0, r0, #1\r |
4ff2d527 |
724 | add r1, r0, #2\r |
725 | stmfd sp!,{r1,lr}\r |
cc68a136 |
726 | bl PicoVideoRead\r |
4ff2d527 |
727 | swp r0, r0, [sp]\r |
cc68a136 |
728 | bl PicoVideoRead\r |
729 | ldmfd sp!,{r1,lr}\r |
730 | orr r0, r0, r1, lsl #16\r |
731 | bx lr\r |
732 | \r |
733 | m_read32_ram:\r |
734 | ldr r1, =Pico\r |
735 | bic r0, r0, #0xff0000\r |
736 | bic r0, r0, #1\r |
737 | ldrh r0, [r1, r0]!\r |
738 | ldrh r1, [r1, #2] @ 2ci\r |
739 | orr r0, r1, r0, lsl #16\r |
740 | bx lr\r |
741 | \r |
742 | m_read32_above_rom:\r |
0ffefdb8 |
743 | ldr r2, =PicoRead16Hook\r |
cc68a136 |
744 | bic r0, r0, #1\r |
0ffefdb8 |
745 | ldr r2, [r2]\r |
cc68a136 |
746 | mov r1, #32\r |
0ffefdb8 |
747 | stmfd sp!,{r0,r2,lr}\r |
748 | mov lr, pc\r |
749 | bx r2\r |
cc68a136 |
750 | mov r1, r0\r |
0ffefdb8 |
751 | ldmfd sp!,{r0,r2}\r |
cc68a136 |
752 | stmfd sp!,{r1}\r |
753 | add r0, r0, #2\r |
754 | mov r1, #32\r |
0ffefdb8 |
755 | mov lr, pc\r |
756 | bx r2\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 |
760e26c7 |
862 | ldr r2, =SekCycleCnt\r |
e5503e2f |
863 | streqb r1, [r3, r0] @ zram\r |
760e26c7 |
864 | ldr r0, [r2]\r |
865 | add r0, r0, #2 @ hack?\r |
866 | str r0, [r2]\r |
e5503e2f |
867 | bx lr\r |
868 | \r |
869 | m_write8_z80_not_ram:\r |
870 | and r2, r0, #0x6000\r |
871 | cmp r2, #0x4000\r |
872 | bne m_write8_z80_not_ym2612\r |
4b9c5888 |
873 | ldr r3, =PicoOpt\r |
e5503e2f |
874 | and r0, r0, #3\r |
4b9c5888 |
875 | ldr r3, [r3]\r |
876 | mov r2, #0 @ is_from_z80 = 0\r |
877 | tst r3, #1\r |
e5503e2f |
878 | bxeq lr\r |
879 | stmfd sp!,{lr}\r |
4b9c5888 |
880 | and r1, r1, #0xff\r |
881 | bl ym2612_write_local\r |
e5503e2f |
882 | ldr r2, =emustatus\r |
883 | ldmfd sp!,{lr}\r |
884 | ldr r1, [r2]\r |
471484e4 |
885 | and r0, r0, #1\r |
886 | orr r1, r0, r1\r |
4b9c5888 |
887 | str r1, [r2] @ emustatus|=ym2612_write_local(a&3, d);\r |
e5503e2f |
888 | bx lr\r |
889 | \r |
890 | m_write8_z80_not_ym2612: @ not too likely\r |
891 | mov r2, r0, lsl #17\r |
892 | bic r2, r2, #6<<17\r |
893 | mov r3, #0x7f00\r |
894 | orr r3, r3, #0x0011\r |
895 | cmp r3, r2, lsr #17 @ psg @ z80 area?\r |
896 | beq m_write8_psg\r |
897 | and r2, r0, #0x7f00\r |
898 | cmp r2, #0x6000 @ bank register?\r |
899 | bxne lr @ invalid write\r |
900 | \r |
901 | m_write8_z80_bank_reg:\r |
902 | ldr r3, =(Pico+0x22208) @ Pico.m\r |
903 | ldrh r2, [r3, #0x0a]\r |
4b9c5888 |
904 | mov r1, r1, lsl #8\r |
e5503e2f |
905 | orr r2, r1, r2, lsr #1\r |
906 | bic r2, r2, #0xfe00\r |
907 | strh r2, [r3, #0x0a]\r |
908 | bx lr\r |
909 | \r |
910 | \r |
911 | m_write8_not_z80:\r |
912 | and r2, r0, #0xe70000\r |
913 | cmp r2, #0xc00000 @ VDP area?\r |
bf537655 |
914 | bne OtherWrite8 @ passthrough\r |
e5503e2f |
915 | and r2, r0, #0xf9\r |
916 | cmp r2, #0x11\r |
bf537655 |
917 | bne OtherWrite8\r |
e5503e2f |
918 | m_write8_psg:\r |
919 | ldr r2, =PicoOpt\r |
4b9c5888 |
920 | and r0, r1, #0xff\r |
e5503e2f |
921 | ldr r2, [r2]\r |
922 | tst r2, #2\r |
923 | bxeq lr\r |
bf537655 |
924 | b SN76496Write\r |
e5503e2f |
925 | \r |