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Routines |
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The body of a guard_ew guard (guard_ew). It walks two units a frame along X, turning round whenever the move leaves it blocked. Bit 0 of +13 is the direction, 1 for +X; the layout starts it at 0, heading -X. Its legs are the next record, and get its dX and X each frame; it never moves along Y, so their dY stays 0. Deadly to touch.
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| upd_150_151 | B73C | CALL adj_p7_m12 | pixel offsets: 13 pixels above the legs | |
| B73F | BIT 0,(IX+$0D) | dX = +2 or -2 from bit 0 of +13 | ||
| B743 | LD A,$02 | |||
| B745 | JR NZ,guard_ew_move | |||
| B747 | NEG | |||
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