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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 */ |
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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 | |
| df43aeea |
52 | .global run_game /* u16 mapper */ |
| 53 | run_game: |
| 54 | move.w #0x2700, sr |
| 55 | ldarg 0, 0, d7 |
| 56 | move.l #0xa10000, a7 |
| 57 | moveq.l #0x00, d1 |
| 58 | move.b #0xff, d2 |
| 59 | move.b d1, (0x0b,a7) /* CtrlB */ |
| 60 | move.b d1, (0x0d,a7) /* CtrlC */ |
| 61 | move.b d2, (0x0f,a7) /* TxDataA */ |
| 62 | move.b d1, (0x13,a7) /* S-CtrlA */ |
| 63 | move.b d2, (0x15,a7) /* TxDataB */ |
| 64 | move.b d1, (0x19,a7) /* S-CtrlB */ |
| 65 | move.b d2, (0x1b,a7) /* TxDataC */ |
| 66 | move.b d1, (0x1f,a7) /* S-CtrlC */ |
| 67 | |
| 68 | move.l #0xff0000, a1 |
| 69 | move.l #0x10000/4/4-1, %d0 |
| 70 | 0: |
| 71 | move.l d1, (%a1)+ |
| 72 | move.l d1, (%a1)+ |
| 73 | move.l d1, (%a1)+ |
| 74 | move.l d1, (%a1)+ |
| 75 | dbra d0, 0b |
| 76 | |
| 77 | lea (run_game_code,pc), a0 |
| 78 | move.l #0xfff000, a1 |
| 79 | move.l #(run_game_code_end - run_game_code)/2-1, d0 |
| 80 | 0: |
| 81 | move.w (%a0)+, (%a1)+ |
| 82 | dbra d0, 0b |
| 83 | jmp 0xfff000 |
| 84 | |
| 85 | run_game_code: |
| 86 | move.w #0x3210, (0xA13006) |
| 87 | |
| 88 | move.w d7, (0xA13010) |
| 89 | move.w #0, (0xA13000) |
| 90 | |
| 91 | move.l (0x00), a7 |
| 92 | move.l (0x04), a0 |
| 93 | jmp (a0) |
| 94 | run_game_code_end: |
| 95 | |
| 96 | |
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97 | # vim:filetype=asmM68k:ts=4:sw=4:expandtab |
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