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CLICK.D
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1988-07-11
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; Doug's Programming Language -- DPL, Version 2.22
; Copyright (c) 1988 Douglas S. Cody, All rights reserved.
;----------------------------------------
; C L I C K -- MAKE A SHORT CLICK SOUND
;
; Entry conditions:
; Whenever a click noise is needed
; Exit conditions:
; No registers modified
;
PUBLIC CLICK
SUBPGM CLICK
BEGIN CLICK
PUSH AX
PUSH CX
PUSH DX
;
; PERFORM A HARDWARE MANIPULATED CLICK
;
MOV AL,10110110B ; TIMER 2, LSB, MSB, BINARY
OUT 43H,AL ; TIMER MODE REGISTER
MOV AX,53H*20 ; 500 HZ TONE
OUT 42H,AL ; LSB
MOV AL,AH ;
OUT 42H,AL ; MSB
IN AL,61H ; GET THE CURRENT STATE
MOV AH,AL ; SAVE FOR LATER RESTORATION
AND AH,0FCH ; WITH THE TIMER/BEEPER OFF.
OR AL,3 ; CALC THE TIMER GATE & ENABLE
OUT 61H,AL ; SOUND OFF!!!!
;
MOV CX,2000 ; WAIST TIME
;
CLCK:
PUSH CX
POP CX
LOOP CLCK
;
MOV AL,AH ; RESTORE ALL
OUT 61H,AL
;
CLX:
POP DX
POP CX
POP AX
RETURN
;
;----------------
ENDPGM CLICK
;----------------
;