| 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 | |
| df43aeea |
9 | .global read_joy_responses /* u8 *rbuf */ |
| 51f3a685 |
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 | |
| eea25dd1 |
52 | /* expects: |
| 53 | * a0 = #0xa10003 |
| 54 | * d0 = #0 |
| 55 | * d1 = #0x40 |
| 56 | * trashes d2, d3 |
| 57 | */ |
| 58 | sync_with_teensy: |
| ad997e79 |
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 */ |
| eea25dd1 |
80 | |
| 81 | rts |
| 82 | |
| 83 | |
| 84 | .macro t_nop |
| ad997e79 |
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 | |
| eea25dd1 |
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) |
| eea25dd1 |
117 | t_nop |
| ad997e79 |
118 | move.b (a0), d2 |
| 119 | move.b d1, (a0) |
| eea25dd1 |
120 | t_nop |
| ad997e79 |
121 | move.b (a0), d3 |
| 122 | move.b d0, (a0) |
| eea25dd1 |
123 | t_nop |
| ad997e79 |
124 | move.b (a0), d4 |
| 125 | move.b d1, (a0) |
| eea25dd1 |
126 | t_nop |
| ad997e79 |
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 |
| ad997e79 |
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 | |
| eea25dd1 |
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 | |
| 65d9165c |
237 | .global run_game /* u16 mapper, int tas_sync */ |
| df43aeea |
238 | run_game: |
| 8e980212 |
239 | move.w #0x2700, sr |
| df43aeea |
240 | ldarg 0, 0, d7 |
| 65d9165c |
241 | ldarg 1, 0, d6 |
| ad997e79 |
242 | movea.l #0xa10000, a6 |
| 243 | movea.l #0xc00000, a5 |
| 244 | movea.l #0xc00005, a4 |
| 245 | movea.l #0xc00004, a3 |
| bae3c7fd |
246 | moveq.l #0x00, d0 |
| 247 | move.b #0x40, d1 /* d2 is tmp */ |
| 8e980212 |
248 | move.b #0xff, d3 /* d4 is temp */ |
| 47896a18 |
249 | moveq.l #0x00, d5 /* progress cnt */ |
| 8e980212 |
250 | movea.l d0, a7 |
| bae3c7fd |
251 | move.b d1, (0x09,a6) /* CtrlA */ |
| 252 | move.b d0, (0x0b,a6) /* CtrlB */ |
| 253 | move.b d0, (0x0d,a6) /* CtrlC */ |
| 254 | move.b d0, (0x13,a6) /* S-CtrlA */ |
| 65d9165c |
255 | move.b d3, (0x0f,a6) /* TxDataA */ |
| bae3c7fd |
256 | move.b d0, (0x19,a6) /* S-CtrlB */ |
| 65d9165c |
257 | move.b d3, (0x15,a6) /* TxDataB */ |
| bae3c7fd |
258 | move.b d0, (0x1f,a6) /* S-CtrlC */ |
| 65d9165c |
259 | move.b d3, (0x1b,a6) /* TxDataC */ |
| 260 | |
| 8e980212 |
261 | move.w #0xcbaf, (0xA13006) /* some scratch area */ |
| 262 | |
| df43aeea |
263 | move.l #0xff0000, a1 |
| bae3c7fd |
264 | move.l #0x10000/4/4-1, d2 |
| df43aeea |
265 | 0: |
| bae3c7fd |
266 | move.l d0, (a1)+ |
| 267 | move.l d0, (a1)+ |
| 268 | move.l d0, (a1)+ |
| 269 | move.l d0, (a1)+ |
| 270 | dbra d2, 0b |
| 65d9165c |
271 | |
| 272 | lea (run_game_r,pc), a0 |
| bae3c7fd |
273 | move.l #0xffff80, a1 |
| 274 | move.l #(run_game_r_end - run_game_r)/2-1, d2 |
| df43aeea |
275 | 0: |
| 65d9165c |
276 | move.w (a0)+, (a1)+ |
| bae3c7fd |
277 | dbra d2, 0b |
| 65d9165c |
278 | |
| bae3c7fd |
279 | tst.l d6 |
| 47896a18 |
280 | beq.s sync_hvc |
| 65d9165c |
281 | |
| bae3c7fd |
282 | movea.l #0xa10003, a0 |
| bae3c7fd |
283 | bsr sync_with_teensy /* trashes d3 */ |
| 284 | move.l d0, (-4,a7) |
| df43aeea |
285 | |
| 47896a18 |
286 | sync_hvc: |
| 8e980212 |
287 | addq.l #1, d6 /* attempt counter */ |
| 288 | |
| 47896a18 |
289 | /* set up for progress vram write (x,y - tile #) */ |
| 290 | /* GFX_WRITE_VRAM_ADDR(0xc000 + (x + 64 * y) * 2) */ |
| 291 | /* d = d5 + '0' - 32 + 0xB000/32 - 128 = d5 + 0x510 */ |
| 47896a18 |
292 | move.l #(0x40000003 | ((36 + 64*1) << 17)), (a3) |
| 293 | add.w #0x510, d5 |
| 294 | move.w d5, (a5) |
| 295 | move.w #('/'+0x4e0), (a5) |
| 8e980212 |
296 | move.w #('4'+0x4e0), (a5) |
| 297 | |
| 298 | lea hexchars, a1 |
| 299 | move.l #(0x40000003 | ((31 + 64*2) << 17)), (a3) |
| 300 | moveq.l #8-1, d5 |
| 301 | 0: |
| 302 | rol.l #4, d3 |
| 303 | move.b d3, d4 |
| 304 | and.l #0x0f, d4 |
| 305 | move.b (d4,a1), d4 |
| 306 | add.w #0x4e0, d4 |
| 307 | move.w d4, (a5) |
| 308 | dbra d5, 0b |
| 309 | |
| 310 | movea.l #0xc00008, a0 |
| 311 | movea.l #0x3ff000, a1 |
| 312 | movea.l #0xffffe0, a2 |
| 47896a18 |
313 | |
| 65d9165c |
314 | /* wait for active display */ |
| bae3c7fd |
315 | moveq.l #3, d2 |
| 65d9165c |
316 | 0: |
| bae3c7fd |
317 | btst d2, (a4) /* 8 */ |
| 65d9165c |
318 | beq.s 0b /* 10 */ |
| 319 | 0: |
| bae3c7fd |
320 | btst d2, (a4) |
| 65d9165c |
321 | bne.s 0b |
| 322 | |
| 323 | /* flood the VDP FIFO */ |
| 324 | .rept 5 |
| bae3c7fd |
325 | move.w d0, (a5) |
| 65d9165c |
326 | .endr |
| 327 | |
| a0ae1014 |
328 | /* these seem stable for both 50Hz/60Hz */ |
| 329 | move.l (a0), (a1)+ /* #0xff07ff09 */ |
| 330 | move.l (a0), (a1)+ /* #0xff00ff11 */ |
| 331 | move.l (a0), (a1)+ /* #0xff18ff1a */ |
| 332 | move.l (a0), (a1)+ /* #0xff21ff23 */ |
| 333 | move.l (a0), (a1)+ /* #0xff2aff28 */ |
| 334 | move.l (a0), (a1)+ /* #0xff33ff34 */ |
| 335 | move.l (a0), (a1)+ /* #0xff3cff3e */ |
| 336 | move.l (a0), (a1)+ /* #0xff45ff47 */ |
| 8e980212 |
337 | |
| 338 | /* as long as exactly 8 or more RAM writes are performed here, */ |
| 339 | /* after multiple tries RAM refresh somehow eventually syncs */ |
| a0ae1014 |
340 | /* after cold boot, only 50Hz syncs to always same values though, */ |
| 341 | /* so values below are 50Hz */ |
| 342 | move.l (a0), (a2)+ /* #0xff4eff4f */ |
| 343 | move.l (a0), (a2)+ /* #0xff58ff59 */ |
| 344 | move.l (a0), (a2)+ /* #0xff60ff62 */ |
| 345 | move.l (a0), (a2)+ /* #0xff69ff6b */ |
| 346 | move.l (a0), (a2)+ /* #0xff72ff74 */ |
| 347 | move.l (a0), (a2)+ /* #0xff7bff7c */ |
| 348 | move.l (a0), (a2)+ /* #0xff83ff85 */ |
| 349 | move.l (a0), (a2)+ /* #0xff8eff8f */ |
| 8e980212 |
350 | |
| 8e980212 |
351 | sub.l #4*8, a1 |
| a0ae1014 |
352 | sub.l #4*8, a2 |
| 8e980212 |
353 | |
| a0ae1014 |
354 | moveq.l #1, d5 |
| 8e980212 |
355 | move.l (0x00,a1), d3 |
| a0ae1014 |
356 | cmp.l #0xff07ff09, d3 |
| 8e980212 |
357 | bne.w sync_hvc |
| 358 | |
| 359 | moveq.l #2, d5 |
| 360 | move.l (0x04,a1), d3 |
| 361 | cmp.l #0xff00ff11, d3 /* mystery value */ |
| 362 | bne.w sync_hvc |
| 363 | |
| 364 | moveq.l #3, d5 |
| 365 | move.l (0x1c,a1), d3 |
| 366 | cmp.l #0xff45ff47, d3 |
| 367 | bne.w sync_hvc |
| 368 | |
| a0ae1014 |
369 | btst.b #6, (0xa10001) |
| 370 | bne.s sync_hvc_50hz |
| 8e980212 |
371 | |
| a0ae1014 |
372 | sync_hvc_60hz: |
| 373 | /* unable to get stable RAM between cold boots :( */ |
| 374 | moveq.l #4, d5 |
| 375 | move.l (0x1c,a2), d3 |
| 376 | cmp.l #0xff8dff8f, d3 /* unstable */ |
| 377 | beq.s sync_hvc_end |
| 378 | cmp.l #0xff8cff8e, d3 /* stable? */ |
| 379 | beq.s sync_hvc_end |
| 380 | cmp.l #0xff8eff90, d3 |
| 381 | beq.s sync_hvc_end |
| 382 | bra.w sync_hvc |
| 8e980212 |
383 | |
| 384 | sync_hvc_50hz: |
| 8e980212 |
385 | moveq.l #4, d5 |
| a0ae1014 |
386 | move.l (0x1c,a2), d3 |
| 8e980212 |
387 | cmp.l #0xff8eff8f, d3 /* RAM */ |
| 388 | bne.w sync_hvc |
| 47896a18 |
389 | |
| a0ae1014 |
390 | sync_hvc_end: |
| bae3c7fd |
391 | movea.l d0, a0 |
| 392 | movea.l #0xA13000, a1 |
| 393 | |
| 394 | move.b d0, (0x09,a6) /* CtrlA */ |
| 395 | move.b d1, (0x03,a6) |
| 396 | |
| 397 | jmp 0xffff80 |
| 398 | |
| 399 | run_game_r: |
| 400 | move.w #0x3210, (0x06,a1) /* 0xA13006 */ |
| 401 | move.w d7, (0x10,a1) /* 0xA13010 */ |
| 402 | move.w d0, (a1) /* 0xA13000 */ |
| 403 | |
| 404 | move.l (a0)+, a7 |
| 405 | move.l (a0), a0 |
| 65d9165c |
406 | |
| 65d9165c |
407 | jmp (a0) |
| bae3c7fd |
408 | run_game_r_end: |
| df43aeea |
409 | |
| 8e980212 |
410 | hexchars: |
| 411 | dc.b '0','1','2','3','4','5','6','7' |
| 412 | dc.b '8','9','a','b','c','d','e','f' |
| 413 | |
| 51f3a685 |
414 | # vim:filetype=asmM68k:ts=4:sw=4:expandtab |
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