MagneticSensorChessBoard1987

Hardware

Front

Back

Connectors

Schematics

Parts:

1. TTL 74151 8 to 1 Multiplexer
2. TTL 74154 4 to 16 Demultiplexer

Partlist

1. chess plan 35 mm fields
2. 64 Reed Contacts
3. 16 Black Chess Pieces
4. 16 White Chess Pieces
5. 32 magnets
6. 17 red LEDs
7. On/Off switch
8. Male Sub-D Connector 15
9. Adapter cable Centronics - SUB-D 15 Female
10. Copper Tape
11. Aluminum Frame
12. 1 TTL 74151
13. 1 TTL 74154
14. 330 Ohm Resistor
15. Batteryholder for 3 x AA

Software

Centronics Port Check

DATA SEGMENT PUBLIC 'DATA'

DATA ENDS
DGROUP GROUP DATA
       ASSUME CS:ADDS,DS:DGROUP,SS:DGROUP

ADDS SEGMENT 'CODE'
PUBLIC CheckBrett,Sound

Sound PROC FAR ; Freq,Time: INTEGER;
  PUSH BP
  MOV BP,SP
  PUSH DI
  MOV DI,8[BP] ; Freq;
  MOV BX,6[BP] ; Time;

  MOV AL,0B6H ; Zeitgeber Modus-Register schreiben
  OUT 43H,AL
  MOV DX,14H   ; Zeitgeber Divisor =
  MOV AX,4F38H ; 1331000/Frequenz
  DIV DI
  OUT 42H,AL   ; Zaehler in niederw. Byte Timer 2
  MOV AL,AH
  OUT 42H,AL  ; Zaehler in hoeherw. Byte Timer 2
  IN AL,61H   ; Aktuelle Einstellung Port B
  MOV AH,AL   ; In AH Sichern
  OR AL,3     ; Lautsprecher einschalten
  OUT 61H,AL

Warte:
  MOV CX,2801  ; 10 Millisekunden warten

LS_Ein:
  LOOP LS_Ein
  DEC BX       ; Einschaltzaehler auf 0?
  JNZ Warte    ; wenn nicht Lautsprecher anlassen

  MOV AL,AH    ; Port wiederherstellen
  OUT 61H,AL


  POP DI
  POP BP
  RET 4
Sound ENDP

CheckBrett PROC FAR  ;d,l: INTEGER: BOOLEAN
  PUSH BP
  MOV BP,SP
  CLI
  MOV AX,8[BP]   ; d
  MOV CX,6[BP]   ; l
  MOV DX,0278h
  OUT DX,AL      ; Port[Data]:=D
  INC DX
  IN AL,DX
  XCHG AL,CL
  DEC DX
  OUT DX,AL     ; Port[Data]:=l
  STI
  MOV AX,0
  AND CL,080h
  JNZ FALSE

  INC AX

FALSE:

  POP BP
  RET 4

CheckBrett ENDP


ADDS  ENDS
      END
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