| 4ff2d527 |
1 | @ vim:filetype=armasm\r |
| 2 | \r |
| cc68a136 |
3 | @ memory handlers with banking support for SSF II - The New Challengers\r |
| 4 | @ mostly based on Gens code\r |
| 5 | \r |
| 6cadc2da |
6 | @ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r |
| cc68a136 |
7 | @ All Rights Reserved\r |
| 8 | \r |
| 9 | \r |
| e5503e2f |
10 | .include "port_config.s"\r |
| cc68a136 |
11 | \r |
| 12 | .text\r |
| 3ec29f01 |
13 | .align 4\r |
| cc68a136 |
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 |
| 29a95187 |
26 | .long m_read8_rom8 @ 0x400000 - 0x47FFFF - for all those large ROM hacks\r |
| cc68a136 |
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 |
| 29a95187 |
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 |
| 7969166e |
44 | .long m_read8_vdp @ 0xD00000 - 0xD7FFFF\r |
| 45 | .long m_read8_vdp @ 0xD80000 - 0xDFFFFF\r |
| cc68a136 |
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 |
| 29a95187 |
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 |
| 7969166e |
77 | .long m_read16_vdp @ 0xC80000 - 0xCFFFFF\r |
| 78 | .long m_read16_vdp @ 0xD00000 - 0xD7FFFF\r |
| 79 | .long m_read16_vdp @ 0xD80000 - 0xDFFFFF\r |
| cc68a136 |
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 |
| 7969166e |
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 |
| 3ec29f01 |
123 | .align 4\r |
| cc68a136 |
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 |
| 3ec29f01 |
141 | .align 4\r |
| cc68a136 |
142 | \r |
| 143 | .global PicoMemReset\r |
| 144 | .global PicoRead8\r |
| 145 | .global PicoRead16\r |
| 146 | .global PicoRead32\r |
| e5503e2f |
147 | .global PicoWrite8\r |
| cc68a136 |
148 | .global PicoWriteRomHW_SSF2\r |
| e5503e2f |
149 | .global m_m68k_read8_misc\r |
| 150 | .global m_m68k_write8_misc\r |
| cc68a136 |
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 |
| 3ec29f01 |
190 | mov r2, #20\r |
| cc68a136 |
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 |
| 3ec29f01 |
202 | mov r2, #20\r |
| cc68a136 |
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 |
| 3ec29f01 |
214 | mov r2, #20\r |
| cc68a136 |
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 |
| 7969166e |
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 |
| cc68a136 |
296 | m_read8_nosram:\r |
| 7969166e |
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 |
| cc68a136 |
414 | m_read8_vdp:\r |
| 415 | tst r0, #0x70000\r |
| 416 | tsteq r0, #0x000e0\r |
| 417 | bxne lr @ invalid read\r |
| 9761a7d0 |
418 | b PicoVideoRead8\r |
| cc68a136 |
419 | \r |
| 420 | m_read8_ram:\r |
| 421 | ldr r1, =Pico\r |
| 422 | bic r0, r0, #0xff0000\r |
| 423 | eor r0, r0, #1\r |
| 424 | ldrb r0, [r1, r0]\r |
| 425 | bx lr\r |
| 426 | \r |
| 427 | m_read8_above_rom:\r |
| 1dceadae |
428 | @ might still be SRam (Micro Machines, HardBall '95)\r |
| 429 | ldr r2, =(SRam)\r |
| 430 | ldr r3, =(Pico+0x22200)\r |
| 431 | ldr r1, [r2, #8] @ SRam.end\r |
| 432 | cmp r0, r1\r |
| 433 | bgt m_read8_ar_nosram\r |
| 434 | ldr r1, [r2, #4] @ SRam.start\r |
| 435 | cmp r0, r1\r |
| 436 | blt m_read8_ar_nosram\r |
| 437 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
| 438 | tst r1, #5\r |
| 439 | bne SRAMRead\r |
| 440 | m_read8_ar_nosram:\r |
| 0ffefdb8 |
441 | ldr r2, =PicoRead16Hook\r |
| cc68a136 |
442 | stmfd sp!,{r0,lr}\r |
| 0ffefdb8 |
443 | ldr r2, [r2]\r |
| cc68a136 |
444 | bic r0, r0, #1\r |
| 445 | mov r1, #8\r |
| 0ffefdb8 |
446 | mov lr, pc\r |
| 447 | bx r2\r |
| cc68a136 |
448 | ldmfd sp!,{r1,lr}\r |
| 449 | tst r1, #1\r |
| 450 | moveq r0, r0, lsr #8\r |
| 451 | bx lr\r |
| 452 | \r |
| 453 | .pool\r |
| 454 | \r |
| 455 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
| 456 | \r |
| 457 | .macro m_read16_rom sect\r |
| 458 | ldr r1, =(Pico+0x22200)\r |
| 459 | bic r0, r0, #0xf80000\r |
| 460 | ldr r1, [r1]\r |
| 461 | bic r0, r0, #1\r |
| 462 | .if \sect\r |
| 463 | orr r0, r0, #0x080000*\sect\r |
| 464 | .endif\r |
| 465 | ldrh r0, [r1, r0]\r |
| 466 | bx lr\r |
| 467 | .endm\r |
| 468 | \r |
| 469 | \r |
| 470 | m_read16_rom0: @ 0x000000 - 0x07ffff\r |
| 471 | m_read16_rom 0\r |
| 472 | \r |
| 473 | m_read16_rom1: @ 0x080000 - 0x0fffff\r |
| 474 | m_read16_rom 1\r |
| 475 | \r |
| 476 | m_read16_rom2: @ 0x100000 - 0x17ffff\r |
| 477 | m_read16_rom 2\r |
| 478 | \r |
| 479 | m_read16_rom3: @ 0x180000 - 0x1fffff\r |
| 480 | m_read16_rom 3\r |
| 481 | \r |
| 482 | m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)\r |
| 483 | ldr r2, =(SRam)\r |
| 484 | ldr r3, =(Pico+0x22200)\r |
| 485 | ldr r1, [r2, #8] @ SRam.end\r |
| 486 | bic r0, r0, #0xf80000\r |
| 487 | bic r0, r0, #1\r |
| 488 | orr r0, r0, #0x200000\r |
| 489 | cmp r0, r1\r |
| 490 | bgt m_read16_nosram\r |
| 7969166e |
491 | ldr r1, [r2, #4] @ SRam.start\r |
| cc68a136 |
492 | cmp r0, r1\r |
| 493 | blt m_read16_nosram\r |
| 7969166e |
494 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
| 495 | tst r1, #5\r |
| 496 | beq m_read16_nosram\r |
| 497 | stmfd sp!,{lr}\r |
| 9dc09829 |
498 | bl SRAMRead16\r |
| 7969166e |
499 | ldmfd sp!,{pc}\r |
| cc68a136 |
500 | m_read16_nosram:\r |
| 7969166e |
501 | ldr r1, [r3, #4] @ romsize\r |
| cc68a136 |
502 | cmp r0, r1\r |
| 503 | movgt r0, #0\r |
| 504 | bxgt lr @ bad location\r |
| 505 | ldr r1, [r3] @ 1ci\r |
| 506 | ldrh r0, [r1, r0]\r |
| 507 | bx lr\r |
| 508 | \r |
| 509 | m_read16_rom5: @ 0x280000 - 0x2fffff\r |
| 510 | m_read16_rom 5\r |
| 511 | \r |
| 512 | m_read16_rom6: @ 0x300000 - 0x37ffff\r |
| 513 | m_read16_rom 6\r |
| 514 | \r |
| 515 | m_read16_rom7: @ 0x380000 - 0x3fffff\r |
| 516 | m_read16_rom 7\r |
| 517 | \r |
| 518 | m_read16_rom8: @ 0x400000 - 0x47ffff\r |
| 519 | m_read16_rom 8\r |
| 520 | \r |
| 521 | m_read16_rom9: @ 0x480000 - 0x4fffff\r |
| 522 | m_read16_rom 9\r |
| 523 | \r |
| cc68a136 |
524 | m_read16_romA: @ 0x500000 - 0x57ffff\r |
| 525 | m_read16_rom 0xA\r |
| 526 | \r |
| 527 | m_read16_romB: @ 0x580000 - 0x5fffff\r |
| 528 | m_read16_rom 0xB\r |
| 529 | \r |
| 530 | m_read16_romC: @ 0x600000 - 0x67ffff\r |
| 531 | m_read16_rom 0xC\r |
| 532 | \r |
| 533 | m_read16_romD: @ 0x680000 - 0x6fffff\r |
| 534 | m_read16_rom 0xD\r |
| 535 | \r |
| 536 | m_read16_romE: @ 0x700000 - 0x77ffff\r |
| 537 | m_read16_rom 0xE\r |
| 538 | \r |
| 539 | m_read16_romF: @ 0x780000 - 0x7fffff\r |
| 540 | m_read16_rom 0xF\r |
| 541 | \r |
| 29a95187 |
542 | m_read16_rom10: @ 0x800000 - 0x87ffff\r |
| 543 | m_read16_rom 0x10\r |
| 544 | \r |
| 545 | m_read16_rom11: @ 0x880000 - 0x8fffff\r |
| 546 | m_read16_rom 0x11\r |
| 547 | \r |
| 548 | m_read16_rom12: @ 0x900000 - 0x97ffff\r |
| 549 | m_read16_rom 0x12\r |
| 550 | \r |
| 551 | m_read16_rom13: @ 0x980000 - 0x9fffff\r |
| 552 | m_read16_rom 0x13\r |
| 553 | \r |
| cc68a136 |
554 | m_read16_misc:\r |
| cc68a136 |
555 | bic r0, r0, #1\r |
| 4ff2d527 |
556 | mov r1, #16\r |
| 557 | b OtherRead16\r |
| cc68a136 |
558 | \r |
| 559 | m_read16_vdp:\r |
| 7969166e |
560 | tst r0, #0x70000 @ if ((a&0xe700e0)==0xc00000)\r |
| cc68a136 |
561 | tsteq r0, #0x000e0\r |
| 562 | bxne lr @ invalid read\r |
| cc68a136 |
563 | bic r0, r0, #1\r |
| 4ff2d527 |
564 | b PicoVideoRead\r |
| cc68a136 |
565 | \r |
| 566 | m_read16_ram:\r |
| 567 | ldr r1, =Pico\r |
| 568 | bic r0, r0, #0xff0000\r |
| 569 | bic r0, r0, #1\r |
| 570 | ldrh r0, [r1, r0]\r |
| 571 | bx lr\r |
| 572 | \r |
| 573 | m_read16_above_rom:\r |
| 1dceadae |
574 | @ might still be SRam\r |
| 575 | ldr r2, =(SRam)\r |
| 576 | ldr r3, =(Pico+0x22200)\r |
| 577 | ldr r1, [r2, #8] @ SRam.end\r |
| cc68a136 |
578 | bic r0, r0, #1\r |
| 1dceadae |
579 | cmp r0, r1\r |
| 580 | bgt m_read16_ar_nosram\r |
| 581 | ldr r1, [r2, #4] @ SRam.start\r |
| 582 | cmp r0, r1\r |
| 583 | blt m_read16_ar_nosram\r |
| 584 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
| 585 | tst r1, #5\r |
| 586 | beq m_read16_ar_nosram\r |
| 587 | stmfd sp!,{lr}\r |
| 9dc09829 |
588 | bl SRAMRead16\r |
| 1dceadae |
589 | ldmfd sp!,{pc}\r |
| 590 | m_read16_ar_nosram:\r |
| 0ffefdb8 |
591 | ldr r2, =PicoRead16Hook\r |
| 592 | ldr r2, [r2]\r |
| 4ff2d527 |
593 | mov r1, #16\r |
| 0ffefdb8 |
594 | bx r2\r |
| cc68a136 |
595 | \r |
| 596 | .pool\r |
| 597 | \r |
| 598 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
| 599 | \r |
| 600 | .macro m_read32_rom sect\r |
| 601 | ldr r1, =(Pico+0x22200)\r |
| 602 | bic r0, r0, #0xf80000\r |
| 603 | ldr r1, [r1]\r |
| 604 | bic r0, r0, #1\r |
| 605 | .if \sect\r |
| 606 | orr r0, r0, #0x080000*\sect\r |
| 607 | .endif\r |
| 608 | ldrh r0, [r1, r0]!\r |
| 609 | ldrh r1, [r1, #2] @ 1ci\r |
| 610 | orr r0, r1, r0, lsl #16\r |
| 611 | bx lr\r |
| 612 | .endm\r |
| 613 | \r |
| 614 | \r |
| 615 | m_read32_rom0: @ 0x000000 - 0x07ffff\r |
| 616 | m_read32_rom 0\r |
| 617 | \r |
| 618 | m_read32_rom1: @ 0x080000 - 0x0fffff\r |
| 619 | m_read32_rom 1\r |
| 620 | \r |
| 621 | m_read32_rom2: @ 0x100000 - 0x17ffff\r |
| 622 | m_read32_rom 2\r |
| 623 | \r |
| 624 | m_read32_rom3: @ 0x180000 - 0x1fffff\r |
| 625 | m_read32_rom 3\r |
| 626 | \r |
| 627 | m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)\r |
| 628 | ldr r2, =(SRam)\r |
| 629 | ldr r3, =(Pico+0x22200)\r |
| 630 | ldr r1, [r2, #8] @ SRam.end\r |
| 631 | bic r0, r0, #0xf80000\r |
| 632 | bic r0, r0, #1\r |
| 633 | orr r0, r0, #0x200000\r |
| 634 | cmp r0, r1\r |
| 635 | bgt m_read32_nosram\r |
| 7969166e |
636 | ldr r1, [r2, #4] @ SRam.start\r |
| cc68a136 |
637 | cmp r0, r1\r |
| 638 | blt m_read32_nosram\r |
| 7969166e |
639 | ldrb r1, [r3, #0x11] @ Pico.m.sram_reg\r |
| 640 | tst r1, #5\r |
| 641 | beq m_read32_nosram\r |
| 642 | stmfd sp!,{r0,lr}\r |
| 9dc09829 |
643 | bl SRAMRead16\r |
| 7969166e |
644 | ldmfd sp!,{r1,lr}\r |
| 645 | stmfd sp!,{r0,lr}\r |
| 646 | add r0, r1, #2\r |
| 9dc09829 |
647 | bl SRAMRead16\r |
| 7969166e |
648 | ldmfd sp!,{r1,lr}\r |
| 3ec29f01 |
649 | orr r0, r0, r1, lsl #16\r |
| cc68a136 |
650 | bx lr\r |
| 651 | m_read32_nosram:\r |
| 7969166e |
652 | ldr r1, [r3, #4] @ romsize\r |
| cc68a136 |
653 | cmp r0, r1\r |
| 654 | movgt r0, #0\r |
| 655 | bxgt lr @ bad location\r |
| 656 | ldr r1, [r3] @ (1ci)\r |
| 657 | ldrh r0, [r1, r0]!\r |
| 658 | ldrh r1, [r1, #2] @ (2ci)\r |
| 659 | orr r0, r1, r0, lsl #16\r |
| 660 | bx lr\r |
| 661 | \r |
| 662 | m_read32_rom5: @ 0x280000 - 0x2fffff\r |
| 663 | m_read32_rom 5\r |
| 664 | \r |
| 665 | m_read32_rom6: @ 0x300000 - 0x37ffff\r |
| 666 | m_read32_rom 6\r |
| 667 | \r |
| 668 | m_read32_rom7: @ 0x380000 - 0x3fffff\r |
| 669 | m_read32_rom 7\r |
| 670 | \r |
| 671 | m_read32_rom8: @ 0x400000 - 0x47ffff\r |
| 672 | m_read32_rom 8\r |
| 673 | \r |
| 674 | m_read32_rom9: @ 0x480000 - 0x4fffff\r |
| 675 | m_read32_rom 9\r |
| 676 | \r |
| cc68a136 |
677 | m_read32_romA: @ 0x500000 - 0x57ffff\r |
| 678 | m_read32_rom 0xA\r |
| 679 | \r |
| 680 | m_read32_romB: @ 0x580000 - 0x5fffff\r |
| 681 | m_read32_rom 0xB\r |
| 682 | \r |
| 683 | m_read32_romC: @ 0x600000 - 0x67ffff\r |
| 684 | m_read32_rom 0xC\r |
| 685 | \r |
| 686 | m_read32_romD: @ 0x680000 - 0x6fffff\r |
| 687 | m_read32_rom 0xD\r |
| 688 | \r |
| 689 | m_read32_romE: @ 0x700000 - 0x77ffff\r |
| 690 | m_read32_rom 0xE\r |
| 691 | \r |
| 692 | m_read32_romF: @ 0x780000 - 0x7fffff\r |
| 693 | m_read32_rom 0xF\r |
| 694 | \r |
| 29a95187 |
695 | m_read32_rom10: @ 0x800000 - 0x87ffff\r |
| 696 | m_read32_rom 0x10\r |
| 697 | \r |
| 698 | m_read32_rom11: @ 0x880000 - 0x8fffff\r |
| 699 | m_read32_rom 0x11\r |
| 700 | \r |
| 701 | m_read32_rom12: @ 0x900000 - 0x97ffff\r |
| 702 | m_read32_rom 0x12\r |
| 703 | \r |
| 704 | m_read32_rom13: @ 0x980000 - 0x9fffff\r |
| 705 | m_read32_rom 0x13\r |
| 706 | \r |
| cc68a136 |
707 | m_read32_misc:\r |
| 708 | bic r0, r0, #1\r |
| 709 | stmfd sp!,{r0,lr}\r |
| 710 | mov r1, #32\r |
| 711 | bl OtherRead16\r |
| 712 | mov r1, r0\r |
| 713 | ldmfd sp!,{r0}\r |
| 714 | stmfd sp!,{r1}\r |
| 715 | add r0, r0, #2\r |
| 716 | mov r1, #32\r |
| 717 | bl OtherRead16\r |
| 718 | ldmfd sp!,{r1,lr}\r |
| 719 | orr r0, r0, r1, lsl #16\r |
| 720 | bx lr\r |
| 721 | \r |
| 722 | m_read32_vdp:\r |
| 723 | tst r0, #0x70000\r |
| 724 | tsteq r0, #0x000e0\r |
| 725 | bxne lr @ invalid read\r |
| 726 | bic r0, r0, #1\r |
| 4ff2d527 |
727 | add r1, r0, #2\r |
| 728 | stmfd sp!,{r1,lr}\r |
| cc68a136 |
729 | bl PicoVideoRead\r |
| 4ff2d527 |
730 | swp r0, r0, [sp]\r |
| cc68a136 |
731 | bl PicoVideoRead\r |
| 732 | ldmfd sp!,{r1,lr}\r |
| 733 | orr r0, r0, r1, lsl #16\r |
| 734 | bx lr\r |
| 735 | \r |
| 736 | m_read32_ram:\r |
| 737 | ldr r1, =Pico\r |
| 738 | bic r0, r0, #0xff0000\r |
| 739 | bic r0, r0, #1\r |
| 740 | ldrh r0, [r1, r0]!\r |
| 741 | ldrh r1, [r1, #2] @ 2ci\r |
| 742 | orr r0, r1, r0, lsl #16\r |
| 743 | bx lr\r |
| 744 | \r |
| 745 | m_read32_above_rom:\r |
| 0ffefdb8 |
746 | ldr r2, =PicoRead16Hook\r |
| cc68a136 |
747 | bic r0, r0, #1\r |
| 0ffefdb8 |
748 | ldr r2, [r2]\r |
| cc68a136 |
749 | mov r1, #32\r |
| 0ffefdb8 |
750 | stmfd sp!,{r0,r2,lr}\r |
| 751 | mov lr, pc\r |
| 752 | bx r2\r |
| cc68a136 |
753 | mov r1, r0\r |
| 0ffefdb8 |
754 | ldmfd sp!,{r0,r2}\r |
| cc68a136 |
755 | stmfd sp!,{r1}\r |
| 756 | add r0, r0, #2\r |
| 757 | mov r1, #32\r |
| 0ffefdb8 |
758 | mov lr, pc\r |
| 759 | bx r2\r |
| cc68a136 |
760 | ldmfd sp!,{r1,lr}\r |
| 761 | orr r0, r0, r1, lsl #16\r |
| 762 | bx lr\r |
| 763 | \r |
| 764 | .pool\r |
| 765 | \r |
| 766 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
| 767 | \r |
| 768 | PicoWriteRomHW_SSF2: @ u32 a, u32 d\r |
| 769 | and r0, r0, #0xe\r |
| 770 | movs r0, r0, lsr #1\r |
| 771 | bne pwr_banking\r |
| 772 | \r |
| 773 | @ sram register\r |
| 774 | ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg\r |
| 721cd396 |
775 | ldrb r0, [r2]\r |
| cc68a136 |
776 | and r1, r1, #3\r |
| 721cd396 |
777 | bic r0, r0, #3\r |
| 778 | orr r0, r0, r1\r |
| 779 | strb r0, [r2]\r |
| cc68a136 |
780 | bx lr\r |
| 781 | \r |
| 782 | pwr_banking:\r |
| 783 | and r1, r1, #0x1f\r |
| 784 | \r |
| 785 | ldr r3, =m_read8_def_table\r |
| 786 | ldr r2, =m_read8_table\r |
| 787 | ldr r12, [r3, r1, lsl #2]\r |
| 788 | str r12, [r2, r0, lsl #2]\r |
| 789 | \r |
| 790 | ldr r3, =m_read16_def_table\r |
| 791 | ldr r2, =m_read16_table\r |
| 792 | ldr r12, [r3, r1, lsl #2]\r |
| 793 | str r12, [r2, r0, lsl #2]\r |
| 794 | \r |
| 795 | ldr r3, =m_read32_def_table\r |
| 796 | ldr r2, =m_read32_table\r |
| 797 | ldr r12, [r3, r1, lsl #2]\r |
| 798 | str r12, [r2, r0, lsl #2]\r |
| 799 | \r |
| 800 | bx lr\r |
| 721cd396 |
801 | \r |
| e5503e2f |
802 | @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r |
| 803 | \r |
| 804 | @ Here we only handle most often used locations,\r |
| 805 | @ everything else is passed to generic handlers\r |
| 806 | \r |
| 807 | PicoWrite8: @ u32 a, u8 d\r |
| 808 | bic r0, r0, #0xff000000\r |
| 809 | and r2, r0, #0x00e00000\r |
| 810 | cmp r2, #0x00e00000 @ RAM?\r |
| 811 | ldr r3, =Pico\r |
| 812 | biceq r0, r0, #0x00ff0000\r |
| 813 | eoreq r0, r0, #1\r |
| 814 | streqb r1, [r3, r0]\r |
| 815 | bxeq lr\r |
| 816 | \r |
| 817 | m_m68k_write8_misc:\r |
| 818 | bic r2, r0, #0x1f @ most commonly we get i/o port write,\r |
| 819 | cmp r2, #0xa10000 @ so check for it first\r |
| 820 | bne m_write8_misc2\r |
| 821 | m_write8_io:\r |
| 822 | ldr r2, =PicoOpt\r |
| 823 | and r0, r0, #0x1e\r |
| 824 | ldr r2, [r2]\r |
| 825 | ldr r3, =(Pico+0x22000) @ Pico.ioports\r |
| 826 | tst r2, #0x20 @ 6 button pad?\r |
| 827 | streqb r1, [r3, r0, lsr #1]\r |
| 828 | bxeq lr\r |
| 829 | cmp r0, #2\r |
| 830 | cmpne r0, #4\r |
| 831 | bne m_write8_io_done @ not likely to happen\r |
| 832 | add r2, r3, #0x200 @ Pico+0x22200\r |
| 833 | mov r12,#0\r |
| 834 | cmp r0, #2\r |
| 835 | streqb r12,[r2,#0x18]\r |
| 836 | strneb r12,[r2,#0x19] @ Pico.m.padDelay[i] = 0\r |
| 837 | tst r1, #0x40 @ TH\r |
| 838 | beq m_write8_io_done\r |
| 839 | ldrb r12,[r3, r0, lsr #1]\r |
| 840 | tst r12,#0x40\r |
| 841 | bne m_write8_io_done\r |
| 842 | cmp r0, #2\r |
| 843 | ldreqb r12,[r2,#0x0a]\r |
| 844 | ldrneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
| 845 | add r12,r12,#1\r |
| 846 | streqb r12,[r2,#0x0a]\r |
| 847 | strneb r12,[r2,#0x0b] @ Pico.m.padTHPhase\r |
| 848 | m_write8_io_done:\r |
| 849 | strb r1, [r3, r0, lsr #1]\r |
| 850 | bx lr\r |
| 851 | \r |
| 852 | \r |
| 853 | m_write8_misc2:\r |
| 854 | and r2, r0, #0xff0000\r |
| 855 | cmp r2, #0xa00000 @ z80 area?\r |
| 856 | bne m_write8_not_z80\r |
| 857 | tst r0, #0x4000\r |
| 858 | bne m_write8_z80_not_ram\r |
| 859 | ldr r3, =(Pico+0x20000) @ Pico.zram\r |
| 860 | add r2, r3, #0x02200 @ Pico+0x22200\r |
| 861 | ldrb r2, [r2, #9] @ Pico.m.z80Run\r |
| 862 | bic r0, r0, #0xff0000\r |
| 863 | bic r0, r0, #0x00e000\r |
| 864 | tst r2, #1\r |
| 760e26c7 |
865 | ldr r2, =SekCycleCnt\r |
| e5503e2f |
866 | streqb r1, [r3, r0] @ zram\r |
| 760e26c7 |
867 | ldr r0, [r2]\r |
| 868 | add r0, r0, #2 @ hack?\r |
| 869 | str r0, [r2]\r |
| e5503e2f |
870 | bx lr\r |
| 871 | \r |
| 872 | m_write8_z80_not_ram:\r |
| 873 | and r2, r0, #0x6000\r |
| 874 | cmp r2, #0x4000\r |
| 875 | bne m_write8_z80_not_ym2612\r |
| 4b9c5888 |
876 | ldr r3, =PicoOpt\r |
| e5503e2f |
877 | and r0, r0, #3\r |
| 4b9c5888 |
878 | ldr r3, [r3]\r |
| 879 | mov r2, #0 @ is_from_z80 = 0\r |
| 880 | tst r3, #1\r |
| e5503e2f |
881 | bxeq lr\r |
| 882 | stmfd sp!,{lr}\r |
| 4b9c5888 |
883 | and r1, r1, #0xff\r |
| 884 | bl ym2612_write_local\r |
| e5503e2f |
885 | ldr r2, =emustatus\r |
| 886 | ldmfd sp!,{lr}\r |
| 887 | ldr r1, [r2]\r |
| 471484e4 |
888 | and r0, r0, #1\r |
| 889 | orr r1, r0, r1\r |
| 4b9c5888 |
890 | str r1, [r2] @ emustatus|=ym2612_write_local(a&3, d);\r |
| e5503e2f |
891 | bx lr\r |
| 892 | \r |
| 893 | m_write8_z80_not_ym2612: @ not too likely\r |
| 894 | mov r2, r0, lsl #17\r |
| 895 | bic r2, r2, #6<<17\r |
| 896 | mov r3, #0x7f00\r |
| 897 | orr r3, r3, #0x0011\r |
| 898 | cmp r3, r2, lsr #17 @ psg @ z80 area?\r |
| 899 | beq m_write8_psg\r |
| 900 | and r2, r0, #0x7f00\r |
| 901 | cmp r2, #0x6000 @ bank register?\r |
| 902 | bxne lr @ invalid write\r |
| 903 | \r |
| 904 | m_write8_z80_bank_reg:\r |
| 905 | ldr r3, =(Pico+0x22208) @ Pico.m\r |
| 906 | ldrh r2, [r3, #0x0a]\r |
| 4b9c5888 |
907 | mov r1, r1, lsl #8\r |
| e5503e2f |
908 | orr r2, r1, r2, lsr #1\r |
| 909 | bic r2, r2, #0xfe00\r |
| 910 | strh r2, [r3, #0x0a]\r |
| 911 | bx lr\r |
| 912 | \r |
| 913 | \r |
| 914 | m_write8_not_z80:\r |
| 915 | and r2, r0, #0xe70000\r |
| 916 | cmp r2, #0xc00000 @ VDP area?\r |
| bf537655 |
917 | bne OtherWrite8 @ passthrough\r |
| e5503e2f |
918 | and r2, r0, #0xf9\r |
| 919 | cmp r2, #0x11\r |
| bf537655 |
920 | bne OtherWrite8\r |
| e5503e2f |
921 | m_write8_psg:\r |
| 922 | ldr r2, =PicoOpt\r |
| 4b9c5888 |
923 | and r0, r1, #0xff\r |
| e5503e2f |
924 | ldr r2, [r2]\r |
| 925 | tst r2, #2\r |
| 926 | bxeq lr\r |
| bf537655 |
927 | b SN76496Write\r |
| e5503e2f |
928 | \r |
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