|
Routines |
| Prev: CC11 | Up: Map | Next: CC4B |
|
Used by the routines at RunGame and CreateCreature.
Sets the number of frames that CreateCreature waits before it makes a creature. The timer is four times two more than a count of the entries of the object store at ObjectStore that have one of the types 70 to 73. The loop does not move on from the first entry, though, so the first entry is tested 12 times and the timer is 50 if it has one of the types and 08 if it does not.
|
||||
|
Count the matching entries of the object store.
|
||||
| SetCreatureTimer | CC31 | LD HL,$D432 | Start at the first entry of the object store. | |
| CC34 | LD DE,$0010 | Set the size of an entry (which is not used). | ||
| CC37 | LD BC,$1202 | Set the number of entries in B, which is 12, and the starting count in C, which is 02. | ||
| SetCreatureTimer_Loop | CC3A | LD A,(HL) | Fetch the type of the object. | |
| CC3B | AND %11111100 | Keep the type without its lowest two bits. | ||
| CC3D | CP $70 | Jump to SetCreatureTimer_Next unless it is one of the types 70 to 73. | ||
| CC3F | JR NZ,SetCreatureTimer_Next | |||
| CC41 | INC C | Add one to the count. | ||
| SetCreatureTimer_Next | CC42 | DJNZ SetCreatureTimer_Loop | Count down the entries and jump to SetCreatureTimer_Loop until all are tested. | |
|
Set the timer to four times the count.
|
||||
| CC44 | LD A,C | Fetch the count. | ||
| CC45 | ADD A,A | Multiply it by four. | ||
| CC46 | ADD A,A | |||
| CC47 | LD ($A73D),A | Set the timer. | ||
| CC4A | RET | Return. | ||
| Prev: CC11 | Up: Map | Next: CC4B |