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: |
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239 | move.w #0x2700, sr |
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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 /* d4 is temp */ |
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249 | moveq.l #0x00, d5 /* progress cnt */ |
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250 | movea.l d0, a7 |
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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 */ |
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255 | move.b d3, (0x0f,a6) /* TxDataA */ |
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256 | move.b d0, (0x19,a6) /* S-CtrlB */ |
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257 | move.b d3, (0x15,a6) /* TxDataB */ |
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258 | move.b d0, (0x1f,a6) /* S-CtrlC */ |
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259 | move.b d3, (0x1b,a6) /* TxDataC */ |
260 | |
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261 | move.w #0xcbaf, (0xA13006) /* some scratch area */ |
262 | |
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263 | move.l #0xff0000, a1 |
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264 | move.l #0x10000/4/4-1, d2 |
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265 | 0: |
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266 | move.l d0, (a1)+ |
267 | move.l d0, (a1)+ |
268 | move.l d0, (a1)+ |
269 | move.l d0, (a1)+ |
270 | dbra d2, 0b |
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271 | |
272 | lea (run_game_r,pc), a0 |
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273 | move.l #0xffff80, a1 |
274 | move.l #(run_game_r_end - run_game_r)/2-1, d2 |
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275 | 0: |
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276 | move.w (a0)+, (a1)+ |
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277 | dbra d2, 0b |
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278 | |
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279 | tst.l d6 |
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280 | beq.s sync_hvc |
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281 | |
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282 | movea.l #0xa10003, a0 |
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283 | bsr sync_with_teensy /* trashes d3 */ |
284 | move.l d0, (-4,a7) |
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285 | |
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286 | sync_hvc: |
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287 | addq.l #1, d6 /* attempt counter */ |
288 | |
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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 */ |
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292 | move.l #(0x40000003 | ((36 + 64*1) << 17)), (a3) |
293 | add.w #0x510, d5 |
294 | move.w d5, (a5) |
295 | move.w #('/'+0x4e0), (a5) |
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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 |
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313 | |
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314 | /* wait for active display */ |
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315 | moveq.l #3, d2 |
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316 | 0: |
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317 | btst d2, (a4) /* 8 */ |
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318 | beq.s 0b /* 10 */ |
319 | 0: |
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320 | btst d2, (a4) |
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321 | bne.s 0b |
322 | |
323 | /* flood the VDP FIFO */ |
324 | .rept 5 |
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325 | move.w d0, (a5) |
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326 | .endr |
327 | |
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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 */ |
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337 | |
338 | /* as long as exactly 8 or more RAM writes are performed here, */ |
339 | /* after multiple tries RAM refresh somehow eventually syncs */ |
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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 */ |
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350 | |
8e980212 |
351 | sub.l #4*8, a1 |
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352 | sub.l #4*8, a2 |
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353 | |
a0ae1014 |
354 | moveq.l #1, d5 |
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355 | move.l (0x00,a1), d3 |
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356 | cmp.l #0xff07ff09, d3 |
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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 |
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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 |
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383 | |
384 | sync_hvc_50hz: |
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385 | moveq.l #4, d5 |
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386 | move.l (0x1c,a2), d3 |
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387 | cmp.l #0xff8eff8f, d3 /* RAM */ |
388 | bne.w sync_hvc |
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389 | |
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390 | sync_hvc_end: |
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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 |
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406 | |
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407 | jmp (a0) |
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408 | run_game_r_end: |
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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 |