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Routines |
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| 27752 | PUSH BC | Save BC. | ||||||
| 27753 | PUSH DE | Save DE. | ||||||
| 27754 | PUSH HL | Save the guard's location. | ||||||
| 27755 | LD BC,16384 | Convert the guard's location into a display file address. | ||||||
| 27758 | ADD HL,BC | |||||||
| 27759 | CALL 27663 | Set HL' to the corresponding attribute file address. | ||||||
| 27762 | LD DE,28095 | Point DE at the first of the maze background tiles in the temporary guard buffer. | ||||||
| 27765 | CALL 27797 | Copy the top-left maze background tile into the temporary guard buffer. | ||||||
| 27768 | CALL 27797 | Copy the top-right maze background tile into the temporary guard buffer. | ||||||
| 27771 | EXX | Exchange registers. | ||||||
| 27772 | LD BC,30 | Point HL' at the bottom-left tile's attribute byte. | ||||||
| 27775 | ADD HL,BC | |||||||
| 27776 | EXX | Exchange registers. | ||||||
| 27777 | LD A,L | Point HL at the bottom-left tile in the display file. | ||||||
| 27778 | ADD A,30 | |||||||
| 27780 | LD L,A | |||||||
| 27781 | JR NC,27787 | |||||||
| 27783 | LD A,H | |||||||
| 27784 | ADD A,8 | |||||||
| 27786 | LD H,A | |||||||
| 27787 | CALL 27797 | Copy the bottom-left maze background tile into the temporary guard buffer. | ||||||
| 27790 | CALL 27797 | Copy the bottom-right maze background tile into the temporary guard buffer. | ||||||
| 27793 | POP DE | Restore the guard's location to DE. | ||||||
| 27794 | POP HL | Restore the value in DE on entry to HL. | ||||||
| 27795 | POP BC | Restore BC. | ||||||
| 27796 | RET | |||||||
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