|
Routines |
| Prev: AE98 | Up: Map | Next: AF7F |
|
Wipes the game's whole RAM -- $5BA0 to $6107, 1384 bytes -- and falls into main. The one thing it keeps is the ROM's frame counter, which it reads before the wipe and writes back afterwards as the first random seed. A machine that has been switched on for a different length of time therefore gets a different castle.
The read has to come first for a second reason: FRAMES, at $5C78, lies inside the object table (it is byte 16 of object 3), so the wipe destroys it.
|
||||
| START | AF6C | LD HL,$5BA0 | $5BA0 to $6107: the variables and all 40 object records | |
| AF6F | LD BC,$0568 | |||
| AF72 | LD A,($5C78) | FRAMES, the ROM's 50Hz counter, as the seed | ||
| AF75 | PUSH AF | |||
| AF76 | CALL clr_mem | clear them, and take the seed back | ||
| AF79 | POP AF | |||
| AF7A | LD ($5BA0),A | put it back where the wipe cannot reach it | ||
| AF7D | JR main | and set up a game | ||
| Prev: AE98 | Up: Map | Next: AF7F |