| Routines

EC69: Make a sound effect

Used by the routines at 64BD, 77D3, 790D, EC7B, ECE1, FADA and FB52. Makes the sound effect that is used when 'M' is pressed to toggle the message speed, and also by Sam when he is walking, finishes a roll or somersault, picks up the hook or budgie, picks up a telephone, is dialling a telephone number, hangs up a phone, changes disguise, lowers his arm, knocks on a door, blows a fuse, flips a light switch, raises or lowers a window blind, throws the hook, or is falling from the roof of a building. Your browser doesn't support HTML5 audio. Here is a link to the audio instead.
EC69 | PUSH BC |
EC6A | LD A,$01 | BORDER 1 (blue)
EC6C | LD C,$07 | Initialise the duration counter
EC6E | XOR $10 | Flip bit 4 (the speaker bit)
EC70 | OUT ($FE),A | Change the speaker state
EC72 | LD B,$C0 | Perform the pitch delay
EC74 | DJNZ $EC74
EC76 | DEC C | Have we finished the sound effect yet?
EC77 | JR NZ,$EC6E | Jump back if not
EC79 | POP BC |
EC7A | RET |