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693C: Initialize bridge approach state
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Called when terrain profile byte is $03, indicating the start of a bridge approach section. Sets up the bridge Y position counter and fragment counter for the upcoming bridge.
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| init_bridge_approach | 693C | LD A,$01 | Mark bridge approaching (Y position = 1). | |
| 693E | LD ($5F6E),A | |||
| 6941 | LD A,$06 | Start 6-fragment countdown to bridge. | ||
| 6943 | LD ($5EEE),A | |||
| 6946 | RET | |||
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