Routines
Prev: C5B4 Up: Map Next: C5CE
C5BB: Update Random Number
Used by the routines at StartGame, ChooseStartPosition, SpawnBall and SpawnBonus.
Updates the random seed from the frame counter, the old seed and the memory refresh register.
RandomNumber C5BB LD HL,($BBB2) Fetch the frame counter and the random number.
C5BE LD DE,($BBAA)
C5C2 LD A,R Fetch a random number from 80 to FF.
C5C4 ADD A,E Add the low byte of the random number, and then the low byte of the frame counter, to it.
C5C5 ADC A,L
C5C6 LD L,A Make that the low byte of the new random number.
C5C7 LD A,D Add the high byte of the frame counter to the high byte of the random number.
C5C8 ADD A,H
C5C9 LD H,A
C5CA LD ($BBAA),HL Store the new random number.
C5CD RET Return.
Prev: C5B4 Up: Map Next: C5CE