Microsoft QuickBASIC v7.1

Microsoft QuickBASIC v71/E.BAS

@@ -0,0 +1,31 @@
+100 DIGITS% = 200
+110 DIM A%( 200 )
+120 HIGH% = DIGITS%
+130 X% = 0
+140 N% = HIGH% - 1
+150 IF N% <= 0 GOTO 200
+160 A%[ N% ] = 1
+170 N% = N% - 1
+180 GOTO 150
+200 A%[ 1 ] = 2
+210 A%[ 0 ] = 0
+220 IF HIGH% <= 9 GOTO 400
+230 HIGH% = HIGH% - 1
+235 N% = HIGH%
+240 IF N% = 0 GOTO 300
+250 A%[ N% ] = X% MOD N%
+255 rem PRINT "a[n-1]"; A%[ N% - 1 ]
+260 X% = ( 10 * A%[ N% - 1 ] ) + ( X% \ N% )
+265 rem PRINT "x: "; X%, "n: "; N%
+270 N% = N% - 1
+280 GOTO 240
+300 IF X% >= 10 GOTO 330
+310 PRINT USING "#"; X%;
+320 GOTO 220
+330 PRINT USING "##"; X%;
+340 GOTO 220
+400 PRINT ""
+410 PRINT "done"
+420 SYSTEM
+
+

Microsoft QuickBASIC v71/SIEVE.BAS

@@ -0,0 +1,22 @@
+1 SIZE% = 8190
+2 DIM FLAGS%(8191)
+3 PRINT "10 iterations"
+4 FOR X% = 1 TO 10
+5 COUNT% = 0
+6 FOR I% = 0 TO SIZE%
+7 FLAGS%(I%) = 1
+8 NEXT I%
+9 FOR I% = 0 TO SIZE%
+10 IF FLAGS%(I%) = 0 THEN 18
+11 PRIME% = I% + I% + 3
+12 K% = I% + PRIME%
+13 IF K% > SIZE% THEN 17
+14 FLAGS%(K%) = 0
+15 K% = K% + PRIME%
+16 GOTO 13
+17 COUNT% = COUNT% + 1
+18 NEXT I%
+19 NEXT X%
+20 PRINT COUNT%," PRIMES"
+21 SYSTEM
+

Microsoft QuickBASIC v71/TTT.BAS

@@ -0,0 +1,121 @@
+1  REM Tic Tac Toe solving app that learns what WOPR learned: you can't win
+2  REM Only three starting positions are examined. Others are just reflections of these
+3  REM b%   -- The board
+4  REM al%  -- Alpha, for pruning
+5  REM be%  -- Beta, for pruning
+6  REM l%   -- Top-level loop iteration
+7  REM wi%  -- The winning piece (0 none, 1 X, 2, O )
+8  REM re%  -- Resulting score of 4000/minmax board position. 5 draw, 6 X win, 4 Y win
+9  REM sx%  -- Stack array for "recursion" X can be P, V, A, or B for those variables.
+10 REM v%   -- Value of a board position
+11 REM st%  -- Stack Pointer. Even for alpha/beta pruning Minimize plys, Odd for Maximize
+12 REM p%   -- Current position where a new piece is played
+14 REM rw%  -- Row in the Winner function (2000)
+15 REM cw%  -- Column in the Winner function (2000)
+18 REM mc%  -- Move count total for debugging. Should be a multiple of 6493
+19 REM Note: Can't use real recursion with GOSUB because stack is limited to roughly 5 deep
+20 REM       BASIC doesn't support goto/gosub using arrays for target line numbers
+23 li% = VAL(COMMAND$)
+24 IF 0 = li% THEN li% = 1
+30 DIM b%(9)
+32 DIM sp%(10)
+34 DIM sv%(10)
+36 DIM sa%(10)
+37 DIM sb%(10)
+38 mc% = 0
+39 PRINT "start time: "; TIME$
+40 FOR l% = 1 TO li%
+41 mc% = 0
+42 al% = 2
+43 be% = 9
+44 b%(0) = 1
+45 GOSUB 4000
+58 al% = 2
+59 be% = 9
+60 b%(0) = 0
+61 b%(1) = 1
+62 GOSUB 4000
+68 al% = 2
+69 be% = 9
+70 b%(1) = 0
+71 b%(4) = 1
+72 GOSUB 4000
+73 b%(4) = 0
+74 REM print "mc: "; mc%; "  l is "; l%
+80 NEXT l%
+82 REM print elap$
+83 PRINT "end time: "; TIME$
+84 PRINT "iterations: "; li%
+85 PRINT "final move count "; mc%
+88 SYSTEM
+100 END
+
+2000 wi% = b%(0)
+2010 IF 0 = wi% GOTO 2100
+2020 IF wi% = b%(1) AND wi% = b%(2) THEN RETURN
+2030 IF wi% = b%(3) AND wi% = b%(6) THEN RETURN
+2100 wi% = b%(3)
+2110 IF 0 = wi% GOTO 2200
+2120 IF wi% = b%(4) AND wi% = b%(5) THEN RETURN
+2200 wi% = b%(6)
+2210 IF 0 = wi% GOTO 2300
+2220 IF wi% = b%(7) AND wi% = b%(8) THEN RETURN
+2300 wi% = b%(1)
+2310 IF 0 = wi% GOTO 2400
+2320 IF wi% = b%(4) AND wi% = b%(7) THEN RETURN
+2400 wi% = b%(2)
+2410 IF 0 = wi% GOTO 2500
+2420 IF wi% = b%(5) AND wi% = b%(8) THEN RETURN
+2500 wi% = b%(4)
+2510 IF 0 = wi% THEN RETURN
+2520 IF wi% = b%(0) AND wi% = b%(8) THEN RETURN
+2530 IF wi% = b%(2) AND wi% = b%(6) THEN RETURN
+2540 wi% = 0
+2550 RETURN
+
+4000 REM minmax function to find score of a board position
+4010 REM recursion is simulated with gotos
+4030 st% = 0
+4040 v% = 0
+4060 re% = 0
+4100 mc% = mc% + 1
+4102 REM gosub 3000
+4104 IF st% < 4 THEN GOTO 4150
+4105 GOSUB 2000
+4106 IF 0 = wi% THEN GOTO 4140
+4110 IF wi% = 1 THEN re% = 6: GOTO 4280
+4115 re% = 4
+4116 GOTO 4280
+4140 IF st% = 8 THEN re% = 5: GOTO 4280
+4150 IF st% AND 1 THEN v% = 2 ELSE v% = 9
+4160 p% = 0
+4180 IF 0 <> b%(p%) THEN GOTO 4500
+4200 IF st% AND 1 THEN b%(p%) = 1 ELSE b%(p%) = 2
+4210 sp%(st%) = p%
+4230 sv%(st%) = v%
+4245 sa%(st%) = al%
+4246 sb%(st%) = be%
+4260 st% = st% + 1
+4270 GOTO 4100
+4280 st% = st% - 1
+4290 p% = sp%(st%)
+4310 v% = sv%(st%)
+4325 al% = sa%(st%)
+4326 be% = sb%(st%)
+4328 b%(p%) = 0
+4330 IF st% AND 1 THEN GOTO 4340
+4331 IF re% = 4 THEN GOTO 4530
+4332 IF re% < v% THEN v% = re%
+4334 IF v% < be% THEN be% = v%
+4336 IF be% <= al% THEN GOTO 4520
+4338 GOTO 4500
+4340 IF re% = 6 THEN GOTO 4530
+4341 IF re% > v% THEN v% = re%
+4342 IF v% > al% THEN al% = v%
+4344 IF al% >= be% THEN GOTO 4520
+4500 p% = p% + 1
+4505 IF p% < 9 THEN GOTO 4180
+4520 re% = v%
+4530 IF st% = 0 THEN RETURN
+4540 GOTO 4280
+

Microsoft QuickBASIC v71/m.bat

@@ -0,0 +1,3 @@
+ntvdm -r:. -c bc %1.bas %1.obj %1.lst /O
+ntvdm -r:. -c link %1,,%1,.\,nul.def
+

Microsoft QuickBASIC v71/mi.bat

@@ -0,0 +1,2 @@
+ntvdm -r:. -c -p QBX.EXE /RUN %1.BAS
+