| 51f3a685 |
1 | # Assemble with gas |
| 2 | # --register-prefix-optional --bitwise-or |
| 3 | |
| 4 | .macro ldarg arg, stacksz, reg |
| 5 | move.l (4 + \arg * 4 + \stacksz)(%sp), \reg |
| 6 | .endm |
| 7 | |
| 8 | |
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9 | .global read_joy_responses /* u8 *rbuf */ |
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10 | read_joy_responses: |
| 11 | ldarg 0, 0, a1 |
| 12 | movem.l d2-d7, -(sp) |
| 13 | movea.l #0xa10003, a0 |
| 14 | move.b #0x40, (6,a0) |
| 15 | move.b #0x40, (a0) |
| 16 | |
| 17 | .macro one_test val |
| 18 | move.l #100/12-1, d0 |
| 19 | 0: |
| 20 | dbra d0, 0b |
| 21 | move.b \val, d0 |
| 22 | move.b d0, (a0) |
| 23 | move.b (a0), d0 |
| 24 | move.b (a0), d1 |
| 25 | move.b (a0), d2 |
| 26 | move.b (a0), d3 |
| 27 | move.b (a0), d4 |
| 28 | move.b (a0), d5 |
| 29 | move.b (a0), d6 |
| 30 | move.b (a0), d7 |
| 31 | move.b d0, (a1)+ |
| 32 | move.b d1, (a1)+ |
| 33 | move.b d2, (a1)+ |
| 34 | move.b d3, (a1)+ |
| 35 | move.b d4, (a1)+ |
| 36 | move.b d5, (a1)+ |
| 37 | move.b d6, (a1)+ |
| 38 | move.b d7, (a1)+ |
| 39 | .endm |
| 40 | |
| 41 | move.w #0x2700, sr |
| 42 | one_test #0x00 |
| 43 | one_test #0x40 |
| 44 | one_test #0x00 |
| 45 | one_test #0x40 |
| 46 | one_test #0x00 |
| 47 | move.w #0x2000, sr |
| 48 | movem.l (sp)+, d2-d7 |
| 49 | rts |
| 50 | |
| 51 | |
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52 | /* expects: |
| 53 | * a0 = #0xa10003 |
| 54 | * d0 = #0 |
| 55 | * d1 = #0x40 |
| 56 | * trashes d2, d3 |
| 57 | */ |
| 58 | sync_with_teensy: |
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59 | 0: /* wait for special code */ |
| 60 | move.b d1, (a0) |
| 61 | move.b (a0), d2 |
| 62 | move.b d0, (a0) |
| 63 | move.b (a0), d3 |
| 64 | and.b #0x3f, d2 |
| 65 | cmp.b d2, d3 |
| 66 | bne 0b |
| 67 | cmp.b #0x25, d2 |
| 68 | bne 0b |
| 69 | |
| 70 | 0: /* wait for special code to end */ |
| 71 | cmp.b (a0), d2 |
| 72 | beq 0b |
| 73 | |
| 74 | move.b d1, (a0) |
| 75 | move.l #8000000/50/18, d2 |
| 76 | |
| 77 | 0: /* wait enough for teensy to setup it's stuff */ |
| 78 | subq.l #1, d2 /* 8 */ |
| 79 | bgt.s 0b /* 10 */ |
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80 | |
| 81 | rts |
| 82 | |
| 83 | |
| 84 | .macro t_nop |
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85 | /* |
| 86 | * when communicating with 3.3V teensy: |
| 87 | * - no nops: see old value on multiple pins randomly |
| 88 | * - 1 nop: only TR often shows old value |
| 89 | * - 2 nops: ? |
| 90 | */ |
| 91 | nop |
| 92 | nop |
| 93 | .endm |
| 94 | |
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95 | |
| 96 | .global test_joy_read_log /* u8 *dest, int size, int do_sync */ |
| 97 | test_joy_read_log: |
| 98 | ldarg 0, 0, a1 |
| 99 | ldarg 1, 0, d0 |
| 100 | ldarg 2, 0, d1 |
| 101 | movem.l d2-d7, -(sp) |
| 102 | movea.l #0xa10003, a0 |
| 103 | move.l d0, d7 |
| 104 | move.l d1, d6 |
| 105 | |
| 106 | moveq.l #0, d0 |
| 107 | move.l #0x40, d1 |
| 108 | move.b d1, (6,a0) |
| 109 | move.b d1, (a0) |
| 110 | |
| 111 | tst.l d6 |
| 112 | beq.s 2f |
| 113 | bsr sync_with_teensy |
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114 | |
| 115 | 2: /* save data */ |
| 116 | move.b d0, (a0) |
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117 | t_nop |
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118 | move.b (a0), d2 |
| 119 | move.b d1, (a0) |
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120 | t_nop |
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121 | move.b (a0), d3 |
| 122 | move.b d0, (a0) |
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123 | t_nop |
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124 | move.b (a0), d4 |
| 125 | move.b d1, (a0) |
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126 | t_nop |
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127 | move.b (a0), d5 |
| 128 | .if 0 |
| 129 | /* broken on Mega-ED v9?? */ |
| 130 | move.b d2, (a1)+ |
| 131 | move.b d3, (a1)+ |
| 132 | move.b d4, (a1)+ |
| 133 | move.b d5, (a1)+ |
| 134 | .else |
| 135 | lsl.w #8, d2 |
| 136 | move.b d3, d2 |
| 137 | move.w d2, (a1)+ |
| 138 | lsl.w #8, d4 |
| 139 | move.b d5, d4 |
| 140 | move.w d4, (a1)+ |
| 141 | .endif |
| 142 | |
| 143 | /* delay for teensy, 128 not enough.. */ |
| 144 | move.l #256, d2 |
| 145 | 0: |
| 146 | dbra d2, 0b |
| 147 | |
| 148 | subq.l #4, d7 |
| 149 | bgt.s 2b |
| 150 | |
| 151 | movem.l (sp)+, d2-d7 |
| 152 | rts |
| 153 | |
| 154 | |
| 155 | .global test_joy_read_log_vsync /* u8 *dest, int size */ |
| 156 | test_joy_read_log_vsync: |
| 157 | ldarg 0, 0, a1 |
| 158 | ldarg 1, 0, d0 |
| 159 | movem.l d2-d7/a2, -(sp) |
| 160 | movea.l #0xa10003, a0 |
| 161 | movea.l #0xc00005, a2 |
| 162 | move.l d0, d7 |
| 163 | |
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164 | move.l #0x40, d1 |
| 165 | moveq.l #0, d0 |
| 166 | move.b d1, (6,a0) |
| 167 | move.b d1, (a0) |
| 168 | |
| 169 | bsr sync_with_teensy |
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170 | |
| 171 | 2: /* save data */ |
| 172 | move.b d0, (a0) |
| 173 | move.b (a0), d2 |
| 174 | move.b d1, (a0) |
| 175 | move.b (a0), d3 |
| 176 | move.b d2, (a1)+ |
| 177 | move.b d3, (a1)+ |
| 178 | |
| 179 | /* wait for next vsync */ |
| 180 | moveq.l #3, d2 |
| 181 | 0: |
| 182 | btst d2, (a2) |
| 183 | bne.s 0b |
| 184 | 0: |
| 185 | btst d2, (a2) |
| 186 | beq.s 0b |
| 187 | |
| 188 | subq.l #2, d7 |
| 189 | bgt.s 2b |
| 190 | |
| 191 | movem.l (sp)+, d2-d7/a2 |
| 192 | rts |
| 193 | |
| 194 | |
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195 | .global test_byte_write /* u8 *dest, int size, int seed */ |
| 196 | test_byte_write: |
| 197 | ldarg 0, 0, a0 |
| 198 | ldarg 1, 0, d0 |
| 199 | ldarg 2, 0, d1 |
| 200 | movem.l d2-d7, -(sp) |
| 201 | |
| 202 | move.l a0, a1 |
| 203 | add.l d0, a1 |
| 204 | move.l d1, d7 |
| 205 | 0: |
| 206 | move.b d7, d0 |
| 207 | addq.b #1, d7 |
| 208 | move.b d7, d1 |
| 209 | addq.b #1, d7 |
| 210 | move.b d7, d2 |
| 211 | addq.b #1, d7 |
| 212 | move.b d7, d3 |
| 213 | addq.b #1, d7 |
| 214 | move.b d7, d4 |
| 215 | addq.b #1, d7 |
| 216 | move.b d7, d5 |
| 217 | addq.b #1, d7 |
| 218 | move.b d7, d6 |
| 219 | addq.b #1, d7 |
| 220 | |
| 221 | move.b d0, (a0)+ |
| 222 | move.b d1, (a0)+ |
| 223 | move.b d2, (a0)+ |
| 224 | move.b d3, (a0)+ |
| 225 | move.b d4, (a0)+ |
| 226 | move.b d5, (a0)+ |
| 227 | move.b d6, (a0)+ |
| 228 | move.b d7, (a0)+ |
| 229 | addq.b #1, d7 |
| 230 | cmp.l a1, a0 |
| 231 | blt.s 0b |
| 232 | |
| 233 | movem.l (sp)+, d2-d7 |
| 234 | rts |
| 235 | |
| 236 | |
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237 | .global run_game /* u16 mapper, int tas_sync */ |
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238 | run_game: |
| 239 | move.w #0x2700, sr |
| 240 | ldarg 0, 0, d7 |
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241 | ldarg 1, 0, d6 |
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242 | movea.l #0xa10000, a6 |
| 243 | movea.l #0xc00000, a5 |
| 244 | movea.l #0xc00005, a4 |
| 245 | movea.l #0xc00004, a3 |
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246 | moveq.l #0x00, d0 |
| 247 | move.b #0x40, d1 /* d2 is tmp */ |
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248 | move.b #0xff, d3 |
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249 | move.b d1, (0x09,a6) /* CtrlA */ |
| 250 | move.b d0, (0x0b,a6) /* CtrlB */ |
| 251 | move.b d0, (0x0d,a6) /* CtrlC */ |
| 252 | move.b d0, (0x13,a6) /* S-CtrlA */ |
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253 | move.b d3, (0x0f,a6) /* TxDataA */ |
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254 | move.b d0, (0x19,a6) /* S-CtrlB */ |
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255 | move.b d3, (0x15,a6) /* TxDataB */ |
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256 | move.b d0, (0x1f,a6) /* S-CtrlC */ |
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257 | move.b d3, (0x1b,a6) /* TxDataC */ |
| 258 | |
| 259 | /* set up for vram write */ |
| 260 | move.l #0x40000000, (a3) |
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261 | |
| 262 | move.l #0xff0000, a1 |
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263 | move.l #0x10000/4/4-1, d2 |
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264 | 0: |
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265 | move.l d0, (a1)+ |
| 266 | move.l d0, (a1)+ |
| 267 | move.l d0, (a1)+ |
| 268 | move.l d0, (a1)+ |
| 269 | dbra d2, 0b |
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270 | |
| 271 | lea (run_game_r,pc), a0 |
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272 | move.l #0xffff80, a1 |
| 273 | move.l #(run_game_r_end - run_game_r)/2-1, d2 |
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274 | 0: |
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275 | move.w (a0)+, (a1)+ |
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276 | dbra d2, 0b |
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277 | |
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278 | tst.l d6 |
| 279 | beq.s 0f |
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280 | |
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281 | movea.l #0xa10003, a0 |
| 282 | movea.l d0, a7 |
| 283 | bsr sync_with_teensy /* trashes d3 */ |
| 284 | move.l d0, (-4,a7) |
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285 | |
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286 | 0: |
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287 | /* wait for active display */ |
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288 | moveq.l #3, d2 |
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289 | 0: |
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290 | btst d2, (a4) /* 8 */ |
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291 | beq.s 0b /* 10 */ |
| 292 | 0: |
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293 | btst d2, (a4) |
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294 | bne.s 0b |
| 295 | |
| 296 | /* flood the VDP FIFO */ |
| 297 | .rept 5 |
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298 | move.w d0, (a5) |
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299 | .endr |
| 300 | |
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301 | movea.l d0, a0 |
| 302 | movea.l #0xA13000, a1 |
| 303 | |
| 304 | move.b d0, (0x09,a6) /* CtrlA */ |
| 305 | move.b d1, (0x03,a6) |
| 306 | |
| 307 | jmp 0xffff80 |
| 308 | |
| 309 | run_game_r: |
| 310 | move.w #0x3210, (0x06,a1) /* 0xA13006 */ |
| 311 | move.w d7, (0x10,a1) /* 0xA13010 */ |
| 312 | move.w d0, (a1) /* 0xA13000 */ |
| 313 | |
| 314 | move.l (a0)+, a7 |
| 315 | move.l (a0), a0 |
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316 | |
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317 | jmp (a0) |
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318 | run_game_r_end: |
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319 | |
| 51f3a685 |
320 | # vim:filetype=asmM68k:ts=4:sw=4:expandtab |
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