Routines
Prev: D635 Up: Map Next: D665
D64E: The sound of a puff
Used by the routine at PUFF.
Four single waves at pitches read from the ROM, as Knight Lore's crashes and sparkles are. The address is the word at RANDOM with its high byte cut to five bits: the random number is one byte, and the byte after it, the high one here, is BUCKET_OUT, which is 0 or 1, so the pitches come from the first 512 bytes of the ROM. Played by PUFF as a puff begins.
PUFF_SOUND D64E LD HL,(RANDOM) HL = an address in the ROM; four waves
D651 LD A,H
D652 AND $1F
D654 LD H,A
D655 LD E,$04
PUFF_SOUND_0 D657 LD A,(HL) each at the next ROM byte, less its top bit
D658 INC HL
D659 AND $7F
D65B LD B,A
D65C LD C,$01
D65E CALL BEEP
D661 DEC E
D662 JR NZ,PUFF_SOUND_0
D664 RET
Prev: D635 Up: Map Next: D665