| 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 | |
| ad997e79 |
52 | .global test_joy_read_log /* u8 *dest, int size */ |
| 53 | test_joy_read_log: |
| 54 | ldarg 0, 0, a1 |
| 55 | ldarg 1, 0, d0 |
| 56 | movem.l d2-d7, -(sp) |
| 57 | movea.l #0xa10003, a0 |
| 58 | move.l d0, d7 |
| 59 | |
| 60 | .macro joy_read_log_prep |
| 61 | move.l #0x40, d1 |
| 62 | moveq.l #0, d0 |
| 63 | move.b d1, (6,a0) |
| 64 | move.b d1, (a0) |
| 65 | |
| 66 | 0: /* wait for special code */ |
| 67 | move.b d1, (a0) |
| 68 | move.b (a0), d2 |
| 69 | move.b d0, (a0) |
| 70 | move.b (a0), d3 |
| 71 | and.b #0x3f, d2 |
| 72 | cmp.b d2, d3 |
| 73 | bne 0b |
| 74 | cmp.b #0x25, d2 |
| 75 | bne 0b |
| 76 | |
| 77 | 0: /* wait for special code to end */ |
| 78 | cmp.b (a0), d2 |
| 79 | beq 0b |
| 80 | |
| 81 | move.b d1, (a0) |
| 82 | move.l #8000000/50/18, d2 |
| 83 | |
| 84 | 0: /* wait enough for teensy to setup it's stuff */ |
| 85 | subq.l #1, d2 /* 8 */ |
| 86 | bgt.s 0b /* 10 */ |
| 87 | .endm |
| 88 | .macro nop_ |
| 89 | /* |
| 90 | * when communicating with 3.3V teensy: |
| 91 | * - no nops: see old value on multiple pins randomly |
| 92 | * - 1 nop: only TR often shows old value |
| 93 | * - 2 nops: ? |
| 94 | */ |
| 95 | nop |
| 96 | nop |
| 97 | .endm |
| 98 | |
| 99 | joy_read_log_prep |
| 100 | |
| 101 | 2: /* save data */ |
| 102 | move.b d0, (a0) |
| 103 | nop_ |
| 104 | move.b (a0), d2 |
| 105 | move.b d1, (a0) |
| 106 | nop_ |
| 107 | move.b (a0), d3 |
| 108 | move.b d0, (a0) |
| 109 | nop_ |
| 110 | move.b (a0), d4 |
| 111 | move.b d1, (a0) |
| 112 | nop_ |
| 113 | move.b (a0), d5 |
| 114 | .if 0 |
| 115 | /* broken on Mega-ED v9?? */ |
| 116 | move.b d2, (a1)+ |
| 117 | move.b d3, (a1)+ |
| 118 | move.b d4, (a1)+ |
| 119 | move.b d5, (a1)+ |
| 120 | .else |
| 121 | lsl.w #8, d2 |
| 122 | move.b d3, d2 |
| 123 | move.w d2, (a1)+ |
| 124 | lsl.w #8, d4 |
| 125 | move.b d5, d4 |
| 126 | move.w d4, (a1)+ |
| 127 | .endif |
| 128 | |
| 129 | /* delay for teensy, 128 not enough.. */ |
| 130 | move.l #256, d2 |
| 131 | 0: |
| 132 | dbra d2, 0b |
| 133 | |
| 134 | subq.l #4, d7 |
| 135 | bgt.s 2b |
| 136 | |
| 137 | movem.l (sp)+, d2-d7 |
| 138 | rts |
| 139 | |
| 140 | |
| 141 | .global test_joy_read_log_vsync /* u8 *dest, int size */ |
| 142 | test_joy_read_log_vsync: |
| 143 | ldarg 0, 0, a1 |
| 144 | ldarg 1, 0, d0 |
| 145 | movem.l d2-d7/a2, -(sp) |
| 146 | movea.l #0xa10003, a0 |
| 147 | movea.l #0xc00005, a2 |
| 148 | move.l d0, d7 |
| 149 | |
| 150 | /* syncs, sets d0=0, d1=0x40 */ |
| 151 | joy_read_log_prep |
| 152 | |
| 153 | 2: /* save data */ |
| 154 | move.b d0, (a0) |
| 155 | move.b (a0), d2 |
| 156 | move.b d1, (a0) |
| 157 | move.b (a0), d3 |
| 158 | move.b d2, (a1)+ |
| 159 | move.b d3, (a1)+ |
| 160 | |
| 161 | /* wait for next vsync */ |
| 162 | moveq.l #3, d2 |
| 163 | 0: |
| 164 | btst d2, (a2) |
| 165 | bne.s 0b |
| 166 | 0: |
| 167 | btst d2, (a2) |
| 168 | beq.s 0b |
| 169 | |
| 170 | subq.l #2, d7 |
| 171 | bgt.s 2b |
| 172 | |
| 173 | movem.l (sp)+, d2-d7/a2 |
| 174 | rts |
| 175 | |
| 176 | |
| 65d9165c |
177 | .global run_game /* u16 mapper, int tas_sync */ |
| df43aeea |
178 | run_game: |
| 179 | move.w #0x2700, sr |
| 180 | ldarg 0, 0, d7 |
| 65d9165c |
181 | ldarg 1, 0, d6 |
| ad997e79 |
182 | movea.l #0xa10000, a6 |
| 183 | movea.l #0xc00000, a5 |
| 184 | movea.l #0xc00005, a4 |
| 185 | movea.l #0xc00004, a3 |
| 65d9165c |
186 | moveq.l #0x00, d2 |
| 187 | move.b #0xff, d3 |
| 188 | move.b #0x40, d4 |
| 189 | move.b d4, (0x09,a6) /* CtrlA */ |
| 190 | move.b d2, (0x0b,a6) /* CtrlB */ |
| 191 | move.b d2, (0x0d,a6) /* CtrlC */ |
| 192 | move.b d2, (0x13,a6) /* S-CtrlA */ |
| 193 | move.b d3, (0x0f,a6) /* TxDataA */ |
| 194 | move.b d2, (0x19,a6) /* S-CtrlB */ |
| 195 | move.b d3, (0x15,a6) /* TxDataB */ |
| 196 | move.b d2, (0x1f,a6) /* S-CtrlC */ |
| 197 | move.b d3, (0x1b,a6) /* TxDataC */ |
| 198 | |
| 199 | /* set up for vram write */ |
| 200 | move.l #0x40000000, (a3) |
| df43aeea |
201 | |
| 202 | move.l #0xff0000, a1 |
| 65d9165c |
203 | move.l #0x10000/4/4-1, d0 |
| df43aeea |
204 | 0: |
| 65d9165c |
205 | move.l d2, (a1)+ |
| 206 | move.l d2, (a1)+ |
| 207 | move.l d2, (a1)+ |
| 208 | move.l d2, (a1)+ |
| df43aeea |
209 | dbra d0, 0b |
| 210 | |
| 65d9165c |
211 | move.l #0xfffe00, a1 |
| 212 | tst.l d6 |
| 213 | bne use_tas_code |
| 214 | |
| 215 | lea (run_game_r,pc), a0 |
| 216 | move.l #(run_game_r_end - run_game_r)/2-1, d0 |
| 217 | bra 0f |
| 218 | use_tas_code: |
| 219 | lea (run_game_r_tas,pc), a0 |
| 220 | move.l #(run_game_r_tas_end - run_game_r_tas)/2-1, d0 |
| 221 | |
| df43aeea |
222 | 0: |
| 65d9165c |
223 | move.w (a0)+, (a1)+ |
| df43aeea |
224 | dbra d0, 0b |
| 65d9165c |
225 | jmp 0xfffe00 |
| df43aeea |
226 | |
| 65d9165c |
227 | run_game_r: |
| df43aeea |
228 | move.w #0x3210, (0xA13006) |
| 229 | |
| 230 | move.w d7, (0xA13010) |
| 231 | move.w #0, (0xA13000) |
| 232 | |
| 233 | move.l (0x00), a7 |
| 234 | move.l (0x04), a0 |
| 235 | jmp (a0) |
| 65d9165c |
236 | run_game_r_end: |
| 237 | |
| 238 | run_game_r_tas: |
| 239 | move.w #0x3210, (0xA13006) |
| 240 | move.w d7, (0xA13010) |
| 241 | move.w #0, (0xA13000) |
| 242 | |
| 243 | move.l (0x00), a7 |
| 244 | move.l (0x04), a0 |
| 245 | |
| 246 | 0: /* wait for special code */ |
| 247 | move.b d4, (0x03,a6) |
| 248 | move.b (0x03,a6), d0 |
| 249 | move.b d2, (0x03,a6) |
| 250 | move.b (0x03,a6), d1 |
| 251 | and.b #0x3f, d0 |
| 252 | cmp.b d0, d1 |
| 253 | bne 0b |
| 254 | cmp.b #0x25, d0 |
| 255 | bne 0b |
| 256 | |
| 257 | 0: /* wait for special code to end */ |
| 258 | cmp.b (0x03,a6), d0 |
| 259 | beq 0b |
| df43aeea |
260 | |
| 65d9165c |
261 | /* wait for active display */ |
| 262 | moveq.l #3, d0 |
| 263 | 0: |
| 264 | btst d0, (a4) /* 8 */ |
| 265 | beq.s 0b /* 10 */ |
| 266 | 0: |
| 267 | btst d0, (a4) |
| 268 | bne.s 0b |
| 269 | |
| 270 | /* flood the VDP FIFO */ |
| 271 | .rept 5 |
| 272 | move.w d2, (a5) |
| 273 | .endr |
| 274 | |
| 275 | /* doesn't help.. */ |
| 276 | .if 0 |
| 277 | .rept 94 |
| 278 | nop |
| 279 | .endr |
| 280 | move.l #0x93049400, (a3) /* DMALEN LO/HI = 0x0008 */ |
| 281 | move.l #0x95009601, (a3) /* DMA SRC LO/MID */ |
| 282 | move.l #0x977f8114, (a3) /* DMA SRC HI/MODE, Turn off Display */ |
| 283 | move.l #0xc0000080, (a3) /* start DMA */ |
| 284 | .endif |
| 285 | |
| 286 | move.b d2, (0x09,a6) /* CtrlA */ |
| 287 | move.b d4, (0x03,a6) |
| 288 | jmp (a0) |
| 289 | run_game_r_tas_end: |
| df43aeea |
290 | |
| 51f3a685 |
291 | # vim:filetype=asmM68k:ts=4:sw=4:expandtab |
notaz.gp2x.de / megadrive.git / blame