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26450: Ring the bell
Used by the routine at 26342.
Input
L 249
26450 DI Disable interrupts
26451 LD H,17 HL=4601 (duration parameter)
26453 LD D,H D=17 (blue border)
26454 LD A,D Make the bell sound
26455 OUT (254),A
26457 XOR 16
26459 LD D,A
26460 LD B,128
26462 DJNZ 26462
26464 DEC HL
26465 LD A,H
26466 OR L
26467 JR NZ,26454
26469 EI Re-enable interrupts before returning
26470 RET
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