HUH Electronics
                           1429 Maple St.
                        San Mateo, CA 94402
                           (415) 573-7359


                        BEEPER INSTRUCTIONS


                        INSTALLATION

        BE SURE YOUR PET IS UNPLUGGED BEFORE PROCEEDING!  OPEN THE
PET AS DESCRIBED IN THE PET OWNERS MANUAL.  IF YOU HAVEN'T ALREADY
DONE SO, UNPLUG THE CASSETTE P.C. EDGE CONNECTOR FROM THE MAIN
BOARD.  NOTICE THAT THE BEEPER BOARD HAS P.C. FINGERS SIMILAR TO
THOSE ON THE MAIN PET P.C. BOARD.  THE KEYING SLOT WILL ONLY ALLOW
YOU TO DO THIS ONE WAY.  BE SURE IT IS FIRMLY SEATED.
        PLUG THE BEEPER ONTO THE MAIN BOARD WHERE THE CASSETTE
CONNECTOR USED TO GO.  BE SURE THE BEEPER IS COMPONENT SIDE UP!
PEEL THE PROTECTIVE BACKING OFF OF THE TAPE ATTACHED TO THE
BACK OF THE SPEAKER AND STICK THE SPEAKER, FACE UP, TO THE BOTTOM
OF THE PET CHASSIS, JUST IN FRONT OF THE BEEPER BOARD.
        CLOSE UP THE PET, PLUG IT IN AND TURN IT ON.  YOU WILL
PROBABLY GET A 'POWER-ON' BEEP.  TRY LOADING A TAPE; YOU SHOULD GET
A BEEP AFTER THE PROGRAM HEADER IS READ AND AT THE END OF THE
PROGRAM.  SIMILARLY, YOU SHOULD GET A BEEP WHEN A PROGRAM HEADER IS
WRITTEN AND WHEN A PROGRAM IS FINISHED BEING SAVED.
        THE VOLUME OF THE BEEP MAY BE ADJUSTED WITH TRIMPOT R5.
ADJUST IT FOR YOUR EAR. REMEMBER, THE CASE WILL BE CLOSED DURING
NORMAL OPERATION.


                        PROGRAM CONTROL

        THE BEEPER MAY BE BEEPED UNDER PROGRAM CONTROL BY THE
FOLLOWING PROGRAM:
                        10 POKE 59411,53
                        20 POKE 59411,61
THIS ROUTINE WILL RUN THE CASSETTE MOTOR FOR A VERY SHORT TIME;
THE RECORDER CONTROLS SHOULD BE IN NEUTRAL (NO BUTTONS PRESSED).
NOTE THAT THIS ALSO EXTENDS THE LIFE OF THE RECORDER.  THIS ROUTINE
CAN BE EMBEDDED IN A LARGER PROGRAM FOR EMPHASIS, PUNCTUATION OR
GAME EFFECTS ETC.
        THE 'AUX IN' INPUT MAY BE USED BY CONNECTING A JUMPER
BETWEEN THE BEEPER BOARD AND THE MOTOR CONTROL LINE OF THE CASSETTE
#2 CONNECTOR AT THE REAR OF THE PET.  IF NO RECORDER IS PRESENT A
470 OHM RESISTOR MUST BE CONNECTED FROM THE MOTOR LINE TO GROUND
TO SIMULATE THE MOTOR LOAD.  PLEASE REFER TO THE PET MANUAL FOR THE
APPROPRIATE PIN NUMBERS.  IF THE BEEPER IS WIRED IN THIS FASHION THE
FOLLOWING PROGRAM WILL CAUSE A BEEP INDEPENDENT OF THE CASSETTE #1'S
OPERATION:
                        10 A=PEEK(59456):B=A AND(239)
                        20 POKE 59456,A:POKE 59456,B

        FOR THOSE WHO WISH TO CHANGE THE LENGTH OF THE BEEP,  THE
VALUE OF RESISTOR R2 (470K - YELLOW/VIOLET/YELLOW) MAY BE INCREASED
TO LENGTHEN THE BEEP OR DECREASED TO SHORTEN IT.  R2 IS LOCATED
NEXT TO THE ELECTROLYTIC CAPACITOR.