| ← B78F | Map | B7D2 → |
B79B: Sound effect: death burst
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The sound when an inhabitant dies or the bat explodes on a lost ball. It also plays when the missile shot bursts on a wall, or the ball gem's flight runs out.
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| death_burst_counter | B79B | DEFB $00 | Step counter: 0 when the effect is disarmed, otherwise the step it has reached, 1 to 15 | |
| death_burst_periods | B79C | DEFB $64,$6E | Never read | |
| B79E | DEFB $8C,$5A,$50,$32,$C8,$E6,$28,$3C | Pitch period for each step | ||
| B7A6 | DEFB $64,$96,$64,$32,$32,$32 | |||
| B7AC | DEFB $32,$02 | Never read | ||
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| sfx_death_burst | B7AE | LD A,(death_burst_counter) | Read the step counter; a disarmed effect has nothing to play. | |
| B7B1 | OR A | |||
| B7B2 | RET Z | |||
| B7B3 | CP $0F | The counter past its last step: clear it and return. That disarms the effect. | ||
| B7B5 | JR NZ,death_burst_step | |||
| B7B7 | XOR A | |||
| B7B8 | LD (death_burst_counter),A | |||
| B7BB | RET | |||
| death_burst_step | B7BC | INC A | Advance to the next step and save the counter. | |
| B7BD | LD (death_burst_counter),A | |||
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Each step's pitch comes from the death-burst table.
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| B7C0 | LD E,A | Take this step's period byte into D. | ||
| B7C1 | LD D,$00 | |||
| B7C3 | LD HL,death_burst_periods | |||
| B7C6 | ADD HL,DE | |||
| B7C7 | LD D,(HL) | |||
| B7C8 | LD C,$02 | Two cycles make up each step of the sweep. | ||
| death_burst_emit | B7CA | CALL sound_blip | Emit one cycle at the current period. | |
| B7CD | INC D | Lower the pitch between the two cycles, then repeat until both are done. | ||
| B7CE | DEC C | |||
| B7CF | JR NZ,death_burst_emit | |||
| B7D1 | RET | |||
| ← B78F | Map | B7D2 → |