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Routines |
| Prev: 8B0C | Up: Map | Next: 8B90 |
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Used by the routine at 89D4.
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| 8B1F | LD A,($5C7C) | Take 2 off the current Y position. | ||||||
| 8B22 | SUB $02 | |||||||
| 8B24 | LD ($5C7C),A | |||||||
| 8B27 | LD HL,$8D58 | Increment the distance fallen (8D58). | ||||||
| 8B2A | INC (HL) | |||||||
| 8B2B | LD A,($5C7C) | Put the old Y position in A. | ||||||
| 8B2E | ADD A,$02 | |||||||
| 8B30 | INC (HL) | Increment the distance fallen. | ||||||
| 8B31 | CALL $8452 | Redraw Monty. Control continues to 8B34. | ||||||
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This entry point is used by the routines at 8A0A and 8A63.
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| 8B34 | CALL $8B90 | Check Monty's current movement. | ||||||
| 8B37 | LD HL,$5C7C | Get the current position in HL. | ||||||
| 8B3A | BIT 1,(IX+$00) | Is Monty jumping? | ||||||
| 8B3E | JR NZ,$8B46 | Move forward if so. | ||||||
| 8B40 | SET 0,(HL) | Align Monty with a pixel boundary. | ||||||
| 8B42 | DEC HL | |||||||
| 8B43 | RES 0,(HL) | |||||||
| 8B45 | INC HL | |||||||
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Check that Monty can move in all directions, and block movement that is not possible.
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| 8B46 | LD A,($8D7E) | Get the temporary Y co-ordinate. | ||||||
| 8B49 | BIT 7,(IX+$00) | Can Monty move up? | ||||||
| 8B4D | JR Z,$8B55 | Jump if so. | ||||||
| 8B4F | CP (HL) | Is the current co-ordinate out of bounds? | ||||||
| 8B50 | JR NC,$8B55 | Jump forward if not. | ||||||
| 8B52 | LD (HL),A | Re-align Monty on the appropriate boundary and jump forward. | ||||||
| 8B53 | JR $8B5F | |||||||
| 8B55 | BIT 6,(IX+$00) | Can Monty move down? | ||||||
| 8B59 | JR Z,$8B5F | Jump if so. | ||||||
| 8B5B | CP (HL) | Is the current co-ordinate out of bounds? | ||||||
| 8B5C | JR C,$8B5F | Jump forward if not. | ||||||
| 8B5E | LD (HL),A | Re-align Monty on the appropriate boundary. | ||||||
| 8B5F | LD HL,$5C7B | Point HL at Monty's co-ordinates. | ||||||
| 8B62 | LD A,($8D7D) | Get the temporary X co-ordinate. | ||||||
| 8B65 | BIT 5,(IX+$00) | Can Monty move left? | ||||||
| 8B69 | JR Z,$8B71 | Jump if so. | ||||||
| 8B6B | CP (HL) | Is the current co-ordinate out of bounds? | ||||||
| 8B6C | JR C,$8B71 | Jump forward if not. | ||||||
| 8B6E | LD (HL),A | Re-align Monty on the appropriate boundary and jump forward. | ||||||
| 8B6F | JR $8B7B | |||||||
| 8B71 | BIT 4,(IX+$00) | Can Monty move right? | ||||||
| 8B75 | JR Z,$8B7B | Jump if so. | ||||||
| 8B77 | CP (HL) | Is the current co-ordinate out of bounds? | ||||||
| 8B78 | JR NC,$8B7B | Jump forward if not. | ||||||
| 8B7A | LD (HL),A | Re-align Monty on the appropriate boundary. | ||||||
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Redraw Monty in the new screen position.
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| 8B7B | LD HL,($5C7B) | Get the screen position. | ||||||
| 8B7E | LD ($ECDE),HL | Set this for the graphic to print. | ||||||
| 8B81 | LD A,$04 | Height is 4. | ||||||
| 8B83 | LD ($832E),A | |||||||
| 8B86 | LD HL,($848C) | Get the pointer to the sprite data. | ||||||
| 8B89 | LD ($ECE0),HL | Set this to draw. | ||||||
| 8B8C | CALL $EBE0 | Draw the graphic and return. | ||||||
| 8B8F | RET | |||||||
| Prev: 8B0C | Up: Map | Next: 8B90 |