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Routines |
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Used by the routines at 29597 and 31362. On entry, HL points at the first or second entry in a table of region definitions (at 64780, 64806, 64836, 64868 or 64892) used by a gangster who is on the lookout for Sam. On exit, the carry flag is set if Sam or the gangster is outside the region.
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| 29578 | LD E,1 | A=Sam's or the gangster's x-coordinate | ||||
| 29580 | LD A,(DE) | |||||
| 29581 | CP (HL) | Is Sam or the gangster to the left of the region? | ||||
| 29582 | RET C | Return with the carry flag set if so | ||||
| 29583 | INC HL | Point HL at the upper x-coordinate | ||||
| 29584 | CP (HL) | Is Sam or the gangster to the right of the region? | ||||
| 29585 | CCF | Return with the carry flag set if so | ||||
| 29586 | RET C | |||||
| 29587 | INC HL | Point HL at the lower y-coordinate | ||||
| 29588 | INC E | A=Sam's or the gangster's y-coordinate | ||||
| 29589 | LD A,(DE) | |||||
| 29590 | CP (HL) | Is Sam or the gangster above the region? | ||||
| 29591 | RET C | Return with the carry flag set if so | ||||
| 29592 | INC HL | Point HL at the upper y-coordinate | ||||
| 29593 | CP (HL) | Compare it with Sam's or the gangster's y-coordinate | ||||
| 29594 | INC HL | Point HL at either the disguise ID, or the first byte of the second entry in the table of region definitions | ||||
| 29595 | CCF | Set the carry flag if Sam or the gangster is below the region | ||||
| 29596 | RET | |||||
| Prev: 29559 | Up: Map | Next: 29597 |