Binary

   10 REM Binary demonstration
   11 REM program
  100 REM 
  101 REM set up
  103 REM 
  110 GO SUB 400: LET number=0: GO SUB 300
  115 REM 
  116 REM Menu
  117 REM 
  120 PRINT AT 20,1;"Press "; INVERSE 1;"C"; INVERSE 0;"alculate or "; INVERSE 1;"D"; INVERSE 0;"emonstrate"
  130 LET a$=INKEY$: IF a$="" THEN GO TO 130
  140 IF a$="d" OR a$="D" THEN GO SUB 500: GO TO 120
  150 IF a$="c" OR a$="C" THEN GO SUB 600: GO TO 120
  160 GO TO 130
  300 REM 
  301 REM Display Binary Number
  302 REM 
  310 LET power=128: LET remain=number
  320 FOR x=0 TO 7
  330 LET result=1: LET remain=remain-power
  340 IF remain<0 THEN LET remain=remain+power: LET result=0
  350 LET z=x*4+1: LET color=4-2*result: FOR y=3 TO 9: PRINT AT y,z; PAPER color;"  ": NEXT y
  360 PRINT AT 12,z;result
  370 LET power=power/2: NEXT x
  380 LET a$="00"+STR$ number: LET a$=a$(LEN a$-2 TO LEN a$): PRINT AT 17,22;a$
  390 BEEP .5,number/4: RETURN 
  400 REM 
  401 REM Display Screen
  402 REM 
  410 BORDER 4: PAPER 6: INK 1: CLS 
  420 LET power=256: FOR x=0 TO 7: LET power=power/2: LET z=x*4+1: PRINT AT 1,z;"d";7-x;AT 2,z; INK 3;power: PLOT 32*x+7,96: DRAW 0,55: PLOT 32*x+24,96: DRAW 0,55: NEXT x
  430 PRINT AT 0,0;"(";AT 0,31;")": PLOT 6,174: DRAW 244,0: PRINT AT 0,12; INK 7; PAPER 1;"DATA BUS"
  440 PRINT AT 13,0;"(";AT 13,31;")": PLOT 6,64: DRAW 244,0: PRINT AT 14,10; INK 7; PAPER 1;"BINARY NUMBER"
  450 PRINT AT 17,5;"Decimal Number--"
  460 RETURN 
  500 REM 
  501 REM Demonstration
  502 REM 
  510 PRINT AT 20,1;"Press "; INVERSE 1;"M"; INVERSE 0;"enu or hold down "; INVERSE 1;"F"; INVERSE 0;"reeze"
  520 FOR a=1 TO 255: LET number=a: GO SUB 300
  530 IF INKEY$="M" OR INKEY$="m" THEN RETURN 
  540 IF INKEY$<>"" THEN GO TO 540
  550 NEXT a: RETURN 
  600 REM 
  601 REM Calculate
  602 REM 
  610 PRINT AT 20,1;"Enter a value from 0 to 255     "
  620 INPUT "Decimal Number ? ";number
  630 LET number=INT number: IF number>255 OR number<0 THEN GO TO 620
  640 GO SUB 300: RETURN