1 @ vim:filetype=armasm
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3 @ memory handlers with banking support for SSF II - The New Challengers
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4 @ mostly based on Gens code
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6 @ (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas
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7 @ All Rights Reserved
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13 @ default jump tables
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16 .long m_read8_rom0 @ 0x000000 - 0x07FFFF
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17 .long m_read8_rom1 @ 0x080000 - 0x0FFFFF
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18 .long m_read8_rom2 @ 0x100000 - 0x17FFFF
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19 .long m_read8_rom3 @ 0x180000 - 0x1FFFFF
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20 .long m_read8_rom4 @ 0x200000 - 0x27FFFF
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21 .long m_read8_rom5 @ 0x280000 - 0x2FFFFF
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22 .long m_read8_rom6 @ 0x300000 - 0x37FFFF
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23 .long m_read8_rom7 @ 0x380000 - 0x3FFFFF
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24 .long m_read8_rom8 @ 0x400000 - 0x47FFFF
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25 .long m_read8_rom9 @ 0x480000 - 0x4FFFFF
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26 .long m_read8_romA @ 0x500000 - 0x57FFFF
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27 .long m_read8_romB @ 0x580000 - 0x5FFFFF
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28 .long m_read8_romC @ 0x600000 - 0x67FFFF
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29 .long m_read8_romD @ 0x680000 - 0x6FFFFF
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30 .long m_read8_romE @ 0x700000 - 0x77FFFF
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31 .long m_read8_romF @ 0x780000 - 0x7FFFFF
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32 .long m_read_null @ 0x800000 - 0x87FFFF
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33 .long m_read_null @ 0x880000 - 0x8FFFFF
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34 .long m_read_null @ 0x900000 - 0x97FFFF
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35 .long m_read_null @ 0x980000 - 0x9FFFFF
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36 .long m_read8_misc @ 0xA00000 - 0xA7FFFF
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37 .long m_read_null @ 0xA80000 - 0xAFFFFF
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38 .long m_read_null @ 0xB00000 - 0xB7FFFF
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39 .long m_read_null @ 0xB80000 - 0xBFFFFF
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40 .long m_read8_vdp @ 0xC00000 - 0xC7FFFF
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41 .long m_read8_vdp @ 0xC80000 - 0xCFFFFF
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42 .long m_read_null @ 0xD00000 - 0xD7FFFF
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43 .long m_read_null @ 0xD80000 - 0xDFFFFF
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44 .long m_read8_ram @ 0xE00000 - 0xE7FFFF
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45 .long m_read8_ram @ 0xE80000 - 0xEFFFFF
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46 .long m_read8_ram @ 0xF00000 - 0xF7FFFF
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47 .long m_read8_ram @ 0xF80000 - 0xFFFFFF
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50 .long m_read16_rom0 @ 0x000000 - 0x07FFFF
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51 .long m_read16_rom1 @ 0x080000 - 0x0FFFFF
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52 .long m_read16_rom2 @ 0x100000 - 0x17FFFF
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53 .long m_read16_rom3 @ 0x180000 - 0x1FFFFF
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54 .long m_read16_rom4 @ 0x200000 - 0x27FFFF
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55 .long m_read16_rom5 @ 0x280000 - 0x2FFFFF
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56 .long m_read16_rom6 @ 0x300000 - 0x37FFFF
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57 .long m_read16_rom7 @ 0x380000 - 0x3FFFFF
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58 .long m_read16_rom8 @ 0x400000 - 0x47FFFF
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59 .long m_read16_rom9 @ 0x480000 - 0x4FFFFF
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60 .long m_read16_romA @ 0x500000 - 0x57FFFF
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61 .long m_read16_romB @ 0x580000 - 0x5FFFFF
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62 .long m_read16_romC @ 0x600000 - 0x67FFFF
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63 .long m_read16_romD @ 0x680000 - 0x6FFFFF
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64 .long m_read16_romE @ 0x700000 - 0x77FFFF
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65 .long m_read16_romF @ 0x780000 - 0x7FFFFF
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66 .long m_read_null @ 0x800000 - 0x87FFFF
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67 .long m_read_null @ 0x880000 - 0x8FFFFF
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68 .long m_read_null @ 0x900000 - 0x97FFFF
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69 .long m_read_null @ 0x980000 - 0x9FFFFF
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70 .long m_read16_misc @ 0xA00000 - 0xA7FFFF
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71 .long m_read_null @ 0xA80000 - 0xAFFFFF
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72 .long m_read_null @ 0xB00000 - 0xB7FFFF
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73 .long m_read_null @ 0xB80000 - 0xBFFFFF
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74 .long m_read16_vdp @ 0xC00000 - 0xC7FFFF
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75 .long m_read_null @ 0xC80000 - 0xCFFFFF
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76 .long m_read_null @ 0xD00000 - 0xD7FFFF
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77 .long m_read_null @ 0xD80000 - 0xDFFFFF
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78 .long m_read16_ram @ 0xE00000 - 0xE7FFFF
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79 .long m_read16_ram @ 0xE80000 - 0xEFFFFF
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80 .long m_read16_ram @ 0xF00000 - 0xF7FFFF
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81 .long m_read16_ram @ 0xF80000 - 0xFFFFFF
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84 .long m_read32_rom0 @ 0x000000 - 0x07FFFF
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85 .long m_read32_rom1 @ 0x080000 - 0x0FFFFF
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86 .long m_read32_rom2 @ 0x100000 - 0x17FFFF
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87 .long m_read32_rom3 @ 0x180000 - 0x1FFFFF
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88 .long m_read32_rom4 @ 0x200000 - 0x27FFFF
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89 .long m_read32_rom5 @ 0x280000 - 0x2FFFFF
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90 .long m_read32_rom6 @ 0x300000 - 0x37FFFF
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91 .long m_read32_rom7 @ 0x380000 - 0x3FFFFF
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92 .long m_read32_rom8 @ 0x400000 - 0x47FFFF
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93 .long m_read32_rom9 @ 0x480000 - 0x4FFFFF
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94 .long m_read32_romA @ 0x500000 - 0x57FFFF
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95 .long m_read32_romB @ 0x580000 - 0x5FFFFF
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96 .long m_read32_romC @ 0x600000 - 0x67FFFF
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97 .long m_read32_romD @ 0x680000 - 0x6FFFFF
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98 .long m_read32_romE @ 0x700000 - 0x77FFFF
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99 .long m_read32_romF @ 0x780000 - 0x7FFFFF
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100 .long m_read_null @ 0x800000 - 0x87FFFF
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101 .long m_read_null @ 0x880000 - 0x8FFFFF
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102 .long m_read_null @ 0x900000 - 0x97FFFF
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103 .long m_read_null @ 0x980000 - 0x9FFFFF
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104 .long m_read32_misc @ 0xA00000 - 0xA7FFFF
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105 .long m_read_null @ 0xA80000 - 0xAFFFFF
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106 .long m_read_null @ 0xB00000 - 0xB7FFFF
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107 .long m_read_null @ 0xB80000 - 0xBFFFFF
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108 .long m_read32_vdp @ 0xC00000 - 0xC7FFFF
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109 .long m_read_null @ 0xC80000 - 0xCFFFFF
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110 .long m_read_null @ 0xD00000 - 0xD7FFFF
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111 .long m_read_null @ 0xD80000 - 0xDFFFFF
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112 .long m_read32_ram @ 0xE00000 - 0xE7FFFF
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113 .long m_read32_ram @ 0xE80000 - 0xEFFFFF
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114 .long m_read32_ram @ 0xF00000 - 0xF7FFFF
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115 .long m_read32_ram @ 0xF80000 - 0xFFFFFF
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118 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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121 @.section .bss, "brw"
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135 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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139 .global PicoMemReset
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143 .global PicoWriteRomHW_SSF2
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147 ldr r12,=(Pico+0x22204)
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148 ldr r12,[r12] @ romsize
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149 add r12,r12,#0x80000
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151 mov r12,r12,lsr #19
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153 ldr r0, =m_read8_table
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154 ldr r1, =m_read8_def_table
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162 ldr r0, =m_read16_table
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163 ldr r1, =m_read16_def_table
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171 ldr r0, =m_read32_table
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172 ldr r1, =m_read32_def_table
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180 @ update memhandlers according to ROM size
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181 ldr r1, =m_read8_above_rom
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182 ldr r0, =m_read8_table
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189 beq 1b @ do not touch the SRAM area
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190 str r1, [r0, r2, lsl #2]
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193 ldr r1, =m_read16_above_rom
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194 ldr r0, =m_read16_table
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202 str r1, [r0, r2, lsl #2]
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205 ldr r1, =m_read32_above_rom
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206 ldr r0, =m_read32_table
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214 str r1, [r0, r2, lsl #2]
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221 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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224 ldr r2, =m_read8_table
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225 bic r0, r0, #0xff000000
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226 and r1, r0, #0x00f80000
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227 ldr pc, [r2, r1, lsr #17]
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229 PicoRead16: @ u32 a
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230 ldr r2, =m_read16_table
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231 bic r0, r0, #0xff000000
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232 and r1, r0, #0x00f80000
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233 ldr pc, [r2, r1, lsr #17]
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235 PicoRead32: @ u32 a
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236 ldr r2, =m_read32_table
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237 bic r0, r0, #0xff000000
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238 and r1, r0, #0x00f80000
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239 ldr pc, [r2, r1, lsr #17]
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243 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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250 .macro m_read8_rom sect
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251 ldr r1, =(Pico+0x22200)
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252 bic r0, r0, #0xf80000
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255 orr r0, r0, #0x080000*\sect
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263 m_read8_rom0: @ 0x000000 - 0x07ffff
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266 m_read8_rom1: @ 0x080000 - 0x0fffff
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269 m_read8_rom2: @ 0x100000 - 0x17ffff
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272 m_read8_rom3: @ 0x180000 - 0x1fffff
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275 m_read8_rom4: @ 0x200000 - 0x27ffff, SRAM area
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277 ldr r3, =(Pico+0x22200)
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278 ldr r1, [r2, #8] @ SRam.end
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279 bic r0, r0, #0xf80000
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280 orr r0, r0, #0x200000
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283 ldr r1, [r2, #4] @ SRam.start (1ci)
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286 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (1ci)
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287 sub r12,r0, #0x200000
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289 bne m_read8_detected
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291 ble m_read8_detected
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293 orrne r1, r1, #0x10
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294 strneb r1, [r3, #0x11]
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296 tst r1, #4 @ EEPROM read?
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297 ldrne r0, =SRAMReadEEPROM @ (1ci if ne)
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302 ldr r3, [r2] @ SRam.data
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303 ldr r2, [r2, #4] @ SRam.start (1ci)
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308 ldr r1, [r3, #4] @ 1ci
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311 bxgt lr @ bad location
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317 m_read8_rom5: @ 0x280000 - 0x2fffff
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320 m_read8_rom6: @ 0x300000 - 0x37ffff
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323 m_read8_rom7: @ 0x380000 - 0x3fffff
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326 m_read8_rom8: @ 0x400000 - 0x47ffff
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329 m_read8_rom9: @ 0x480000 - 0x4fffff
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332 @ is any ROM using that much?
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333 m_read8_romA: @ 0x500000 - 0x57ffff
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336 m_read8_romB: @ 0x580000 - 0x5fffff
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339 m_read8_romC: @ 0x600000 - 0x67ffff
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342 m_read8_romD: @ 0x680000 - 0x6fffff
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345 m_read8_romE: @ 0x700000 - 0x77ffff
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348 m_read8_romF: @ 0x780000 - 0x7fffff
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352 bic r2, r0, #0x00ff
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353 bic r2, r2, #0xbf00
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354 cmp r2, #0xa00000 @ Z80 RAM?
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355 ldreq r2, =z80Read8
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363 moveq r0, r0, lsr #8
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369 bxne lr @ invalid read
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375 moveq r0, r0, lsr #8
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380 bic r0, r0, #0xff0000
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392 moveq r0, r0, lsr #8
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397 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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399 .macro m_read16_rom sect
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400 ldr r1, =(Pico+0x22200)
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401 bic r0, r0, #0xf80000
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405 orr r0, r0, #0x080000*\sect
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412 m_read16_rom0: @ 0x000000 - 0x07ffff
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415 m_read16_rom1: @ 0x080000 - 0x0fffff
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418 m_read16_rom2: @ 0x100000 - 0x17ffff
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421 m_read16_rom3: @ 0x180000 - 0x1fffff
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424 m_read16_rom4: @ 0x200000 - 0x27ffff, SRAM area (NBA Live 95)
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426 ldr r3, =(Pico+0x22200)
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427 ldr r1, [r2, #8] @ SRam.end
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428 bic r0, r0, #0xf80000
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430 orr r0, r0, #0x200000
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432 bgt m_read16_nosram
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433 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)
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435 beq m_read16_nosram
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436 ldr r1, [r2, #4] @ SRam.start (1ci)
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438 blt m_read16_nosram
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439 ldr r2, [r2] @ SRam.data (1ci)
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441 ldrh r0, [r2, r0] @ 2ci
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444 orr r0, r0, r1, lsl #8
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448 ldr r1, [r3, #4] @ 1ci
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451 bxgt lr @ bad location
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456 m_read16_rom5: @ 0x280000 - 0x2fffff
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459 m_read16_rom6: @ 0x300000 - 0x37ffff
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462 m_read16_rom7: @ 0x380000 - 0x3fffff
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465 m_read16_rom8: @ 0x400000 - 0x47ffff
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468 m_read16_rom9: @ 0x480000 - 0x4fffff
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471 @ is any ROM using that much?
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472 m_read16_romA: @ 0x500000 - 0x57ffff
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475 m_read16_romB: @ 0x580000 - 0x5fffff
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478 m_read16_romC: @ 0x600000 - 0x67ffff
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481 m_read16_romD: @ 0x680000 - 0x6fffff
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484 m_read16_romE: @ 0x700000 - 0x77ffff
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487 m_read16_romF: @ 0x780000 - 0x7fffff
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498 bxne lr @ invalid read
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504 bic r0, r0, #0xff0000
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509 m_read16_above_rom:
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516 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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518 .macro m_read32_rom sect
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519 ldr r1, =(Pico+0x22200)
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520 bic r0, r0, #0xf80000
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524 orr r0, r0, #0x080000*\sect
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527 ldrh r1, [r1, #2] @ 1ci
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528 orr r0, r1, r0, lsl #16
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533 m_read32_rom0: @ 0x000000 - 0x07ffff
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536 m_read32_rom1: @ 0x080000 - 0x0fffff
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539 m_read32_rom2: @ 0x100000 - 0x17ffff
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542 m_read32_rom3: @ 0x180000 - 0x1fffff
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545 m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)
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547 ldr r3, =(Pico+0x22200)
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548 ldr r1, [r2, #8] @ SRam.end
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549 bic r0, r0, #0xf80000
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551 orr r0, r0, #0x200000
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553 bgt m_read32_nosram
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554 ldrb r1, [r3, #0x11] @ Pico.m.sram_reg (2ci)
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556 beq m_read32_nosram
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557 ldr r1, [r2, #4] @ SRam.start (1ci)
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559 blt m_read32_nosram
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560 ldr r2, [r2] @ SRam.data (1ci)
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562 ldrh r0, [r2, r0]! @ (1ci)
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564 orr r0, r0, r0, lsl #16
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566 mov r0, r0, lsl #16
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567 orr r0, r0, r1, lsr #8
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569 orr r0, r0, r1, lsl #8
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573 ldr r1, [r3, #4] @ (1ci)
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576 bxgt lr @ bad location
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577 ldr r1, [r3] @ (1ci)
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579 ldrh r1, [r1, #2] @ (2ci)
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580 orr r0, r1, r0, lsl #16
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583 m_read32_rom5: @ 0x280000 - 0x2fffff
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586 m_read32_rom6: @ 0x300000 - 0x37ffff
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589 m_read32_rom7: @ 0x380000 - 0x3fffff
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592 m_read32_rom8: @ 0x400000 - 0x47ffff
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595 m_read32_rom9: @ 0x480000 - 0x4fffff
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598 @ is any ROM using that much?
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599 m_read32_romA: @ 0x500000 - 0x57ffff
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602 m_read32_romB: @ 0x580000 - 0x5fffff
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605 m_read32_romC: @ 0x600000 - 0x67ffff
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608 m_read32_romD: @ 0x680000 - 0x6fffff
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611 m_read32_romE: @ 0x700000 - 0x77ffff
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614 m_read32_romF: @ 0x780000 - 0x7fffff
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629 orr r0, r0, r1, lsl #16
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635 bxne lr @ invalid read
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643 orr r0, r0, r1, lsl #16
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648 bic r0, r0, #0xff0000
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651 ldrh r1, [r1, #2] @ 2ci
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652 orr r0, r1, r0, lsl #16
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655 m_read32_above_rom:
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667 orr r0, r0, r1, lsl #16
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672 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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674 PicoWriteRomHW_SSF2: @ u32 a, u32 d
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676 movs r0, r0, lsr #1
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680 ldr r2, =(Pico+0x22211) @ Pico.m.sram_reg
\r
691 ldr r3, =m_read8_def_table
\r
692 ldr r2, =m_read8_table
\r
693 ldr r12, [r3, r1, lsl #2]
\r
694 str r12, [r2, r0, lsl #2]
\r
696 ldr r3, =m_read16_def_table
\r
697 ldr r2, =m_read16_table
\r
698 ldr r12, [r3, r1, lsl #2]
\r
699 str r12, [r2, r0, lsl #2]
\r
701 ldr r3, =m_read32_def_table
\r
702 ldr r2, =m_read32_table
\r
703 ldr r12, [r3, r1, lsl #2]
\r
704 str r12, [r2, r0, lsl #2]
\r