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General/SHADOWS
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
Tape/disk: | Home » CEEFAX disks » telesoftware1.adl |
Filename: | General/SHADOWS |
Read OK: | ✔ |
File size: | 14D7 bytes |
Load address: | 1900 |
Exec address: | 801F |
Duplicates
There is 1 duplicate copy of this file in the archive:
- AEW website » mu » mu_5_25_discs_Micro_User_04_09_D-MU04_09.ssd » SHADOW
- CEEFAX disks » telesoftware1.adl » General/SHADOWS
File contents
10REM SHADOW FAX 20REM By Rog Frost 30REM (c) Micro User 40IF PAGE>&E00 GOTO1660 50ON ERROR GOTO 1590 60MODE1:*FX4,1 70VDU23;8202;0;0;0; 80PROCinstruct 90PROCsetupa 100PROCsetupb 110PROCmenu 120END 130DEFPROCsetupa 140shadow%=TRUE 150VDU29,10;512; 160VDU19,2,4;0;19,1,6;0;19,3,2;0; 170score%=0 180*FX202,32 190MOVE0,0 200ENDPROC 210DEFPROCsetupb 220DIMray%(4),X%(5),Y%(5),word$(10),correct$(5) 230FORN%=1TO10:READword$(N%):NEXT 240FORN%=1TO5:READX%(N%),Y%(N%),correct$(N%) 250NEXT 260lsize%=100:lx%=20:osize%=300:ox%=700 270pos%=1 280*FX11,0 290ENDPROC 300DEFPROCdrawlight(lx%,lsize%,col%) 310GCOL0,col% 320ltop%=lsize%:lbottom%=-lsize% 330MOVElx%,ltop%:MOVElx%-20,0:PLOT85,lx%+20,0:PLOT85,lx%,lbottom% 340VDU5:MOVElx%-10,lsize%+70:PRINT"L":VDU4 350ENDPROC 360DEFPROCdrawobject(ox%,osize%,col%) 370GCOL0,col% 380otop%=osize%:obottom%=-osize% 390MOVEox%,otop%:MOVEox%-10,0:PLOT85,ox%+10,0:PLOT85,ox%,obottom% 400VDU5:MOVEox%-10,osize%+70:PRINT"O":VDU4 410ENDPROC 420DEFPROCscreen 430GCOL0,3 440MOVE1000,512:DRAW1000,-512 450ENDPROC 460DEFPROCpoints 470ray%(2)=(1000-lx%)*(otop%-ltop%)/(ox%-lx%)+ltop% 480ray%(4)=(1000-lx%)*(obottom%-ltop%)/(ox%-lx%)+ltop% 490ray%(1)=(1000-lx%)*(otop%-lbottom%)/(ox%-lx%)+lbottom% 500ray%(3)=(1000-lx%)*(obottom%-lbottom%)/(ox%-lx%)+lbottom% 510ENDPROC 520DEFPROCrays 530MOVElx%,ltop%:DRAW1000,ray%(4) 540MOVElx%,ltop%:DRAW1000,ray%(2) 550MOVElx%,lbottom%:DRAW1000,ray%(3) 560MOVElx%,lbottom%:DRAW1000,ray%(1) 570ENDPROC 580DEFPROCshadow 590shadow%=TRUE 600PROCpoints 610VDU19,0,7;0; 620GCOL0,1 630MOVE1000,ray%(1):MOVEox%,otop%:PLOT85,1000,ray%(2) 640GCOL0,2:PLOT85,ox%,obottom%:PLOT85,1000,ray%(3) 650GCOL0,1:PLOT85,1000,ray%(4) 660PROCdrawlight(lx%,lsize%,3):PROCdrawobject(ox%,osize%,3) 670PROCrays 680COLOUR129:PRINTTAB(2,28)" ":COLOUR128:COLOUR1:PRINTTAB(3,28)" = partial shadow" 690COLOUR130:PRINTTAB(2,30)" ":COLOUR128:COLOUR2:PRINTTAB(3,30)" = total shadow" 700*fx15 710REPEATUNTILGET=32:PROCmenu 720ENDPROC 730DEFPROCmenu 740IF shadow%=TRUE VDU19,0,0;0;:GCOL0,128:CLG:PROCdrawlight(lx%,lsize%,3):PROCdrawobject(ox%,osize%,3):PROCscreen:shadow%=FALSE 750COLOUR128:COLOUR3 760*FX15,0 770*FX138,0,32 780PRINTTAB(32,2)"OPTIONS" 790PRINTTAB(33,4)"TEST"TAB(33,5)"PAGE" 800PRINTTAB(33,9)"MOVE"TAB(33,10)"LIGHT" 810PRINTTAB(33,14)"MOVE"TAB(33,15)"OBJECT" 820PRINTTAB(33,19)"MOVE"TAB(33,20)"SWITCH" 830PRINTTAB(32,25)"Space"TAB(32,26)"selects"TAB(32,27)"======="TAB(32,28)"Use"TAB(32,29)"Cursor"TAB(32,30)"keys" 840REPEAT 850key%=GET 860IF key%=32 oldpos%=pos%:pos%=pos%+5 870IF pos%>21 pos%=6 880COLOUR128:PRINTTAB(32,oldpos%-3)" "TAB(32,oldpos%-2)" "TAB(39,oldpos%-2)" "TAB(32,oldpos%-1)" "TAB(39,oldpos%-1)" "TAB(32,oldpos%)" " 890COLOUR129:PRINTTAB(32,pos%-3)" "TAB(32,pos%-2)" "TAB(39,pos%-2)" "TAB(32,pos%-1)" "TAB(39,pos%-1)" "TAB(32,pos%)" " 900UNTILkey%<>32 910IF pos%=6 PROCtest 920IF pos%=11 PROClight 930IF pos%=16 PROCobject 940IF pos%=21 PROCshadow 950ENDPROC 960DEFPROClight 970REPEAT 980olx%=lx%:olsize%=lsize% 990IF INKEY-58 lsize%=lsize%+20:IF lsize%>300 VDU7:lsize%=300 1000IF INKEY-42 lsize%=lsize%-20:IF lsize%<20 VDU7:lsize%=20 1010IF INKEY-26 lx%=lx%-20:IF lx%<20 VDU7:lx%=20 1020IF INKEY-122 lx%=lx%+20:IF lx%>(ox%-60) VDU7:lx%=(ox%-60) 1030IF olx%<>lx% OR olsize%<>lsize% PROCdrawlight(olx%,olsize%,0) 1040PROCdrawlight(lx%,lsize%,3) 1050UNTILINKEY(0)=32 1060PROCmenu 1070ENDPROC 1080DEFPROCobject 1090REPEAT 1100oox%=ox%:oosize%=osize% 1110IF INKEY-58 osize%=osize%+20:IF osize%>300 VDU7:osize%=300 1120IF INKEY-42 osize%=osize%-20:IF osize%<20 VDU7:osize%=20 1130IF INKEY-26 ox%=ox%-20:IF ox%<(lx%+60) VDU7:ox%=(lx%+60) 1140IF INKEY-122 ox%=ox%+20:IF ox%>970 VDU7:ox%=970 1150 IF oox%<>ox% OR oosize%<>osize% PROCdrawobject(oox%,oosize%,0) 1160PROCdrawobject(ox%,osize%,3) 1170UNTILINKEY(0)=32 1180PROCmenu 1190ENDPROC 1200DEFPROCinstruct:VDU19,0,4;0; 1210PRINTTAB(11,1)"SHADOW INVESTIGATION"TAB(11,2)"~~~~~~~~~~~~~~~~~~~~" 1220VDU28,0,31,39,3 1230PRINT''"To investigate shadows you may move a"''"light, an object to cast the shadow"''"and a switch to turn the light on." 1240PRINT'"You may also alter the size of the light"'"and the object." 1250PRINT''"Use Space to move the menu selection"''"box, then use the Cursor keys to" 1260PRINT'"move the light or the object or to"''"alter their sizes." 1270PRINTTAB(7,27)"Press Space to continue" 1280REPEATUNTILGET=32:CLS 1290PRINT''"Your aim is to find out why some shadows"'"have sharp edges and other shadows"''"are very blurred, with a lot of"''"partial shadow." 1300PRINT''"At any time you may attempt a short"''"test by selecting the 'Take Test'"''"option. If you do not score well"''"more investigations will help." 1310PRINTTAB(7,27)"Press Space to continue" 1320REPEATUNTILGET=32:VDU26:CLS:ENDPROC 1330DEFPROCtest 1340VDU20:VDU19,0,4;0;:COLOUR128:CLS 1350PRINTTAB(11,1)"SHADOW INVESTIGATION"TAB(11,2)"~~~~~~~~~~~~~~~~~~~~":VDU28,0,31,27,3 1360PRINT'"To produce a shadow which is"'"sharp, either the light must"'"be (1) or the (2) "'"between the light and the"''"object must be big." 1370PRINT'"Blurred shadows result from"''"a large (3) or the"''"(4) being (5) "''"the light." 1380VDU28,29,26,39,3:COLOUR129:CLS 1390PRINT'"WORDS" 1400PRINT'"A..shadow"''"B..small"''"C..big"''"D..near"''"E..distance" 1410PRINT"F..light"''"G..object"''"H..sun"''"I..rays"''"J..colour" 1420VDU26:COLOUR128 1430PRINTTAB(0,22)"===========================" 1440COLOUR128 1450FORN%=1TO5 1460PRINTTAB(0,26)"Select letter of word for"''"position ";N%; 1470INPUT" ";letter$ 1480IF ASC(letter$)<65 OR ASC(letter$)>75 THEN PRINTTAB(0,26);SPC(120):GOTO1460 1490COLOUR129 1500PRINTTAB(X%(N%),Y%(N%))word$(ASC(letter$)-64) 1510IFword$(ASC(letter$)-64)=correct$(N%) score%=score%+1 1520COLOUR128 1530PRINTTAB(0,26);SPC(120) 1540NEXT 1550PRINTTAB(0,26)"You got ";score%;" words correct." 1560IF score%<5 PRINTTAB(0,28)"Press space to continue investigating.":REPEATUNTILGET=32:PROCsetupa:PROCmenu:ENDPROC 1570IF score%=5 PRINTTAB(0,28)"You understand shadows."''"Press space for next person to start.":REPEATUNTILGET=32:CLEAR:RUN 1580ENDPROC 1590REM ERROR HANDLER 1600*FX12 1610MODE6 1620REPORT:PRINT" at line ";ERL 1630END 1640DATAshadow,small,big,near,distance,light,object,sun,rays,colour 1650DATA3,8,small,19,8,distance,8,16,light,0,18,object,15,18,near 1660REM DOWN LOAD MEMORY FOR DISC SYSTEMS 1670*TAPE 1680FOR I%=0 TO TOP-PAGE STEP 4:I%!&E00=I%!PAGE:NEXT:?&13=?&13-(PAGE-&E00)DIV256:PAGE=&E00:RUN
� SHADOW FAX � By Rog Frost � (c) Micro User (� �>&E00 �D|F 2� � � �TvF < �1:*FX4,1 F�23;8202;0;0;0; P �instruct Z�setupa d�setupb n �menu x� ���setupa � shadow%=� ��29,10;512; � �19,2,4;0;19,1,6;0;19,3,2;0; �score%=0 � *FX202,32 ��0,0 �� ���setupb �.�ray%(4),X%(5),Y%(5),word$(10),correct$(5) ��N%=1�10:�word$(N%):� �'�N%=1�5:�X%(N%),Y%(N%),correct$(N%) �� (lsize%=100:lx%=20:osize%=300:ox%=700 pos%=1 *FX11,0 "� , ��drawlight(lx%,lsize%,col%) 6�0,col% @!ltop%=lsize%:lbottom%=-lsize% J6�lx%,ltop%:�lx%-20,0:�85,lx%+20,0:�85,lx%,lbottom% T �5:�lx%-10,lsize%+70:�"L":�4 ^� h!��drawobject(ox%,osize%,col%) r�0,col% |!otop%=osize%:obottom%=-osize% �6�ox%,otop%:�ox%-10,0:�85,ox%+10,0:�85,ox%,obottom% � �5:�ox%-10,osize%+70:�"O":�4 �� ���screen ��0,3 ��1000,512:�1000,-512 �� ���points �4ray%(2)=(1000-lx%)*(otop%-ltop%)/(ox%-lx%)+ltop% �7ray%(4)=(1000-lx%)*(obottom%-ltop%)/(ox%-lx%)+ltop% �:ray%(1)=(1000-lx%)*(otop%-lbottom%)/(ox%-lx%)+lbottom% �=ray%(3)=(1000-lx%)*(obottom%-lbottom%)/(ox%-lx%)+lbottom% �� ��rays �lx%,ltop%:�1000,ray%(4) �lx%,ltop%:�1000,ray%(2) &�lx%,lbottom%:�1000,ray%(3) 0�lx%,lbottom%:�1000,ray%(1) :� D��shadow N shadow%=� X�points b�19,0,7;0; l�0,1 v-�1000,ray%(1):�ox%,otop%:�85,1000,ray%(2) �*�0,2:�85,ox%,obottom%:�85,1000,ray%(3) ��0,1:�85,1000,ray%(4) �6�drawlight(lx%,lsize%,3):�drawobject(ox%,osize%,3) � �rays �6�129:�2,28)" ":�128:�1:�3,28)" = partial shadow" �4�130:�2,30)" ":�128:�2:�3,30)" = total shadow" � *fx15 ����=32:�menu �� � ��menu �h� shadow%=� �19,0,0;0;:�0,128:�:�drawlight(lx%,lsize%,3):�drawobject(ox%,osize%,3):�screen:shadow%=� ��128:�3 �*FX15,0 *FX138,0,32 �32,2)"OPTIONS" �33,4)"TEST"�33,5)"PAGE" �33,9)"MOVE"�33,10)"LIGHT" *!�33,14)"MOVE"�33,15)"OBJECT" 4!�33,19)"MOVE"�33,20)"SWITCH" >[�32,25)"Space"�32,26)"selects"�32,27)"======="�32,28)"Use"�32,29)"Cursor"�32,30)"keys" H� R key%=� \&� key%=32 oldpos%=pos%:pos%=pos%+5 f� pos%>21 pos%=6 p|�128:�32,oldpos%-3)" "�32,oldpos%-2)" "�39,oldpos%-2)" "�32,oldpos%-1)" "�39,oldpos%-1)" "�32,oldpos%)" " zj�129:�32,pos%-3)" "�32,pos%-2)" "�39,pos%-2)" "�32,pos%-1)" "�39,pos%-1)" "�32,pos%)" " � �key%<>32 �� pos%=6 �test �� pos%=11 �light �� pos%=16 �object �� pos%=21 �shadow �� ���light �� �olx%=lx%:olsize%=lsize% �6� �-58 lsize%=lsize%+20:� lsize%>300 �7:lsize%=300 �4� �-42 lsize%=lsize%-20:� lsize%<20 �7:lsize%=20 �(� �-26 lx%=lx%-20:� lx%<20 �7:lx%=20 �5� �-122 lx%=lx%+20:� lx%>(ox%-60) �7:lx%=(ox%-60) <� olx%<>lx% � olsize%<>lsize% �drawlight(olx%,olsize%,0) �drawlight(lx%,lsize%,3) ��(0)=32 $ �menu .� 8��object B� Loox%=ox%:oosize%=osize% V6� �-58 osize%=osize%+20:� osize%>300 �7:osize%=300 `4� �-42 osize%=osize%-20:� osize%<20 �7:osize%=20 j4� �-26 ox%=ox%-20:� ox%<(lx%+60) �7:ox%=(lx%+60) t+� �-122 ox%=ox%+20:� ox%>970 �7:ox%=970 ~> � oox%<>ox% � oosize%<>osize% �drawobject(oox%,oosize%,0) ��drawobject(ox%,osize%,3) ���(0)=32 � �menu �� ���instruct:�19,0,4;0; �=�11,1)"SHADOW INVESTIGATION"�11,2)"~~~~~~~~~~~~~~~~~~~~" ��28,0,31,39,3 �{�''"To investigate shadows you may move a"''"light, an object to cast the shadow"''"and a switch to turn the light on." �B�'"You may also alter the size of the light"'"and the object." �Q�''"Use Space to move the menu selection"''"box, then use the Cursor keys to" �@�'"move the light or the object or to"''"alter their sizes." �$�7,27)"Press Space to continue" ���=32:� ��''"Your aim is to find out why some shadows"'"have sharp edges and other shadows"''"are very blurred, with a lot of"''"partial shadow." ��''"At any time you may attempt a short"''"test by selecting the 'Take Test'"''"option. If you do not score well"''"more investigations will help." $�7,27)"Press Space to continue" (���=32:�26:�:� 2 ��test <�20:�19,0,4;0;:�128:� FK�11,1)"SHADOW INVESTIGATION"�11,2)"~~~~~~~~~~~~~~~~~~~~":�28,0,31,27,3 P��'"To produce a shadow which is"'"sharp, either the light must"'"be (1) or the (2) "'"between the light and the"''"object must be big." Zg�'"Blurred shadows result from"''"a large (3) or the"''"(4) being (5) "''"the light." d�28,29,26,39,3:�129:� n �'"WORDS" xA�'"A..shadow"''"B..small"''"C..big"''"D..near"''"E..distance" �>�"F..light"''"G..object"''"H..sun"''"I..rays"''"J..colour" ��26:�128 �)�0,22)"===========================" ��128 ��N%=1�5 �7�0,26)"Select letter of word for"''"position ";N%; ��" ";letter$ �:� �(letter$)<65 � �(letter$)>75 � �0,26);�(120):�ttE ��129 �(�X%(N%),Y%(N%))word$(�(letter$)-64) �6�word$(�(letter$)-64)=correct$(N%) score%=score%+1 ��128 ��0,26);�(120) � .�0,26)"You got ";score%;" words correct." U� score%<5 �0,28)"Press space to continue investigating.":���=32:�setupa:�menu:� "c� score%=5 �0,28)"You understand shadows."''"Press space for next person to start.":���=32:�:� ,� 6� ERROR HANDLER @ *FX12 J�6 T�:�" at line ";� ^� h@�shadow,small,big,near,distance,light,object,sun,rays,colour r>�3,8,small,19,8,distance,8,16,light,0,18,object,15,18,near |'� DOWN LOAD MEMORY FOR DISC SYSTEMS � *TAPE �D� I%=0 � �P-� � 4:I%!&E00=I%!�:�:?&13=?&13-(�-&E00)�256:�=&E00:� �
00000000 0d 00 0a 10 f4 20 53 48 41 44 4f 57 20 46 41 58 |..... SHADOW FAX| 00000010 0d 00 14 12 f4 20 42 79 20 52 6f 67 20 46 72 6f |..... By Rog Fro| 00000020 73 74 0d 00 1e 14 f4 20 28 63 29 20 4d 69 63 72 |st..... (c) Micr| 00000030 6f 20 55 73 65 72 0d 00 28 12 e7 20 90 3e 26 45 |o User..(.. .>&E| 00000040 30 30 20 e5 8d 44 7c 46 0d 00 32 0e ee 20 85 20 |00 ..D|F..2.. . | 00000050 e5 20 8d 54 76 46 0d 00 3c 0d eb 31 3a 2a 46 58 |. .TvF..<..1:*FX| 00000060 34 2c 31 0d 00 46 13 ef 32 33 3b 38 32 30 32 3b |4,1..F..23;8202;| 00000070 30 3b 30 3b 30 3b 0d 00 50 0d f2 69 6e 73 74 72 |0;0;0;..P..instr| 00000080 75 63 74 0d 00 5a 0b f2 73 65 74 75 70 61 0d 00 |uct..Z..setupa..| 00000090 64 0b f2 73 65 74 75 70 62 0d 00 6e 09 f2 6d 65 |d..setupb..n..me| 000000a0 6e 75 0d 00 78 05 e0 0d 00 82 0c dd f2 73 65 74 |nu..x........set| 000000b0 75 70 61 0d 00 8c 0d 73 68 61 64 6f 77 25 3d b9 |upa....shadow%=.| 000000c0 0d 00 96 0f ef 32 39 2c 31 30 3b 35 31 32 3b 0d |.....29,10;512;.| 000000d0 00 a0 20 ef 31 39 2c 32 2c 34 3b 30 3b 31 39 2c |.. .19,2,4;0;19,| 000000e0 31 2c 36 3b 30 3b 31 39 2c 33 2c 32 3b 30 3b 0d |1,6;0;19,3,2;0;.| 000000f0 00 aa 0c 73 63 6f 72 65 25 3d 30 0d 00 b4 0d 2a |...score%=0....*| 00000100 46 58 32 30 32 2c 33 32 0d 00 be 08 ec 30 2c 30 |FX202,32.....0,0| 00000110 0d 00 c8 05 e1 0d 00 d2 0c dd f2 73 65 74 75 70 |...........setup| 00000120 62 0d 00 dc 2e de 72 61 79 25 28 34 29 2c 58 25 |b.....ray%(4),X%| 00000130 28 35 29 2c 59 25 28 35 29 2c 77 6f 72 64 24 28 |(5),Y%(5),word$(| 00000140 31 30 29 2c 63 6f 72 72 65 63 74 24 28 35 29 0d |10),correct$(5).| 00000150 00 e6 19 e3 4e 25 3d 31 b8 31 30 3a f3 77 6f 72 |....N%=1.10:.wor| 00000160 64 24 28 4e 25 29 3a ed 0d 00 f0 27 e3 4e 25 3d |d$(N%):....'.N%=| 00000170 31 b8 35 3a f3 58 25 28 4e 25 29 2c 59 25 28 4e |1.5:.X%(N%),Y%(N| 00000180 25 29 2c 63 6f 72 72 65 63 74 24 28 4e 25 29 0d |%),correct$(N%).| 00000190 00 fa 05 ed 0d 01 04 28 6c 73 69 7a 65 25 3d 31 |.......(lsize%=1| 000001a0 30 30 3a 6c 78 25 3d 32 30 3a 6f 73 69 7a 65 25 |00:lx%=20:osize%| 000001b0 3d 33 30 30 3a 6f 78 25 3d 37 30 30 0d 01 0e 0a |=300:ox%=700....| 000001c0 70 6f 73 25 3d 31 0d 01 18 0b 2a 46 58 31 31 2c |pos%=1....*FX11,| 000001d0 30 0d 01 22 05 e1 0d 01 2c 20 dd f2 64 72 61 77 |0.."...., ..draw| 000001e0 6c 69 67 68 74 28 6c 78 25 2c 6c 73 69 7a 65 25 |light(lx%,lsize%| 000001f0 2c 63 6f 6c 25 29 0d 01 36 0b e6 30 2c 63 6f 6c |,col%)..6..0,col| 00000200 25 0d 01 40 21 6c 74 6f 70 25 3d 6c 73 69 7a 65 |%..@!ltop%=lsize| 00000210 25 3a 6c 62 6f 74 74 6f 6d 25 3d 2d 6c 73 69 7a |%:lbottom%=-lsiz| 00000220 65 25 0d 01 4a 36 ec 6c 78 25 2c 6c 74 6f 70 25 |e%..J6.lx%,ltop%| 00000230 3a ec 6c 78 25 2d 32 30 2c 30 3a f0 38 35 2c 6c |:.lx%-20,0:.85,l| 00000240 78 25 2b 32 30 2c 30 3a f0 38 35 2c 6c 78 25 2c |x%+20,0:.85,lx%,| 00000250 6c 62 6f 74 74 6f 6d 25 0d 01 54 20 ef 35 3a ec |lbottom%..T .5:.| 00000260 6c 78 25 2d 31 30 2c 6c 73 69 7a 65 25 2b 37 30 |lx%-10,lsize%+70| 00000270 3a f1 22 4c 22 3a ef 34 0d 01 5e 05 e1 0d 01 68 |:."L":.4..^....h| 00000280 21 dd f2 64 72 61 77 6f 62 6a 65 63 74 28 6f 78 |!..drawobject(ox| 00000290 25 2c 6f 73 69 7a 65 25 2c 63 6f 6c 25 29 0d 01 |%,osize%,col%)..| 000002a0 72 0b e6 30 2c 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28 6f 74 6f 70 25 2d |000-lx%)*(otop%-| 00000380 6c 74 6f 70 25 29 2f 28 6f 78 25 2d 6c 78 25 29 |ltop%)/(ox%-lx%)| 00000390 2b 6c 74 6f 70 25 0d 01 e0 37 72 61 79 25 28 34 |+ltop%...7ray%(4| 000003a0 29 3d 28 31 30 30 30 2d 6c 78 25 29 2a 28 6f 62 |)=(1000-lx%)*(ob| 000003b0 6f 74 74 6f 6d 25 2d 6c 74 6f 70 25 29 2f 28 6f |ottom%-ltop%)/(o| 000003c0 78 25 2d 6c 78 25 29 2b 6c 74 6f 70 25 0d 01 ea |x%-lx%)+ltop%...| 000003d0 3a 72 61 79 25 28 31 29 3d 28 31 30 30 30 2d 6c |:ray%(1)=(1000-l| 000003e0 78 25 29 2a 28 6f 74 6f 70 25 2d 6c 62 6f 74 74 |x%)*(otop%-lbott| 000003f0 6f 6d 25 29 2f 28 6f 78 25 2d 6c 78 25 29 2b 6c |om%)/(ox%-lx%)+l| 00000400 62 6f 74 74 6f 6d 25 0d 01 f4 3d 72 61 79 25 28 |bottom%...=ray%(| 00000410 33 29 3d 28 31 30 30 30 2d 6c 78 25 29 2a 28 6f |3)=(1000-lx%)*(o| 00000420 62 6f 74 74 6f 6d 25 2d 6c 62 6f 74 74 6f 6d 25 |bottom%-lbottom%| 00000430 29 2f 28 6f 78 25 2d 6c 78 25 29 2b 6c 62 6f 74 |)/(ox%-lx%)+lbot| 00000440 74 6f 6d 25 0d 01 fe 05 e1 0d 02 08 0a 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33 39 2c 33 0d 04 ce 7b f1 27 27 |0,31,39,3...{.''| 00000c90 22 54 6f 20 69 6e 76 65 73 74 69 67 61 74 65 20 |"To investigate | 00000ca0 73 68 61 64 6f 77 73 20 79 6f 75 20 6d 61 79 20 |shadows you may | 00000cb0 6d 6f 76 65 20 61 22 27 27 22 6c 69 67 68 74 2c |move a"''"light,| 00000cc0 20 61 6e 20 6f 62 6a 65 63 74 20 74 6f 20 63 61 | an object to ca| 00000cd0 73 74 20 74 68 65 20 73 68 61 64 6f 77 22 27 27 |st the shadow"''| 00000ce0 22 61 6e 64 20 61 20 73 77 69 74 63 68 20 74 6f |"and a switch to| 00000cf0 20 74 75 72 6e 20 74 68 65 20 6c 69 67 68 74 20 | turn the light | 00000d00 6f 6e 2e 22 0d 04 d8 42 f1 27 22 59 6f 75 20 6d |on."...B.'"You m| 00000d10 61 79 20 61 6c 73 6f 20 61 6c 74 65 72 20 74 68 |ay also alter th| 00000d20 65 20 73 69 7a 65 20 6f 66 20 74 68 65 20 6c 69 |e size of the li| 00000d30 67 68 74 22 27 22 61 6e 64 20 74 68 65 20 6f 62 |ght"'"and the ob| 00000d40 6a 65 63 74 2e 22 0d 04 e2 51 f1 27 27 22 55 73 |ject."...Q.''"Us| 00000d50 65 20 53 70 61 63 65 20 74 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I| 00000ef0 66 20 79 6f 75 20 64 6f 20 6e 6f 74 20 73 63 6f |f you do not sco| 00000f00 72 65 20 77 65 6c 6c 22 27 27 22 6d 6f 72 65 20 |re well"''"more | 00000f10 69 6e 76 65 73 74 69 67 61 74 69 6f 6e 73 20 77 |investigations w| 00000f20 69 6c 6c 20 68 65 6c 70 2e 22 0d 05 1e 24 f1 8a |ill help."...$..| 00000f30 37 2c 32 37 29 22 50 72 65 73 73 20 53 70 61 63 |7,27)"Press Spac| 00000f40 65 20 74 6f 20 63 6f 6e 74 69 6e 75 65 22 0d 05 |e to continue"..| 00000f50 28 12 f5 fd a5 3d 33 32 3a ef 32 36 3a db 3a e1 |(....=32:.26:.:.| 00000f60 0d 05 32 0a dd f2 74 65 73 74 0d 05 3c 19 ef 32 |..2...test..<..2| 00000f70 30 3a ef 31 39 2c 30 2c 34 3b 30 3b 3a fb 31 32 |0:.19,0,4;0;:.12| 00000f80 38 3a db 0d 05 46 4b f1 8a 31 31 2c 31 29 22 53 |8:...FK..11,1)"S| 00000f90 48 41 44 4f 57 20 49 4e 56 45 53 54 49 47 41 54 |HADOW INVESTIGAT| 00000fa0 49 4f 4e 22 8a 31 31 2c 32 29 22 7e 7e 7e 7e 7e |ION".11,2)"~~~~~| 00000fb0 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 22 |~~~~~~~~~~~~~~~"| 00000fc0 3a ef 32 38 2c 30 2c 33 31 2c 32 37 2c 33 0d 05 |:.28,0,31,27,3..| 00000fd0 50 95 f1 27 22 54 6f 20 70 72 6f 64 75 63 65 20 |P..'"To produce | 00000fe0 61 20 73 68 61 64 6f 77 20 77 68 69 63 68 20 69 |a shadow which i| 00000ff0 73 22 27 22 73 68 61 72 70 2c 20 65 69 74 68 65 |s"'"sharp, eithe| 00001000 72 20 74 68 65 20 6c 69 67 68 74 20 6d 75 73 74 |r the light must| 00001010 22 27 22 62 65 20 28 31 29 20 20 20 20 20 20 6f |"'"be (1) o| 00001020 72 20 74 68 65 20 28 32 29 20 20 20 20 20 20 22 |r the (2) "| 00001030 27 22 62 65 74 77 65 65 6e 20 74 68 65 20 6c 69 |'"between the li| 00001040 67 68 74 20 61 6e 64 20 74 68 65 22 27 27 22 6f |ght and the"''"o| 00001050 62 6a 65 63 74 20 6d 75 73 74 20 62 65 20 62 69 |bject must be bi| 00001060 67 2e 22 0d 05 5a 67 f1 27 22 42 6c 75 72 72 65 |g."..Zg.'"Blurre| 00001070 64 20 73 68 61 64 6f 77 73 20 72 65 73 75 6c 74 |d shadows result| 00001080 20 66 72 6f 6d 22 27 27 22 61 20 6c 61 72 67 65 | from"''"a large| 00001090 20 28 33 29 20 20 20 20 20 20 6f 72 20 74 68 65 | (3) or the| 000010a0 22 27 27 22 28 34 29 20 20 20 20 20 20 62 65 69 |"''"(4) bei| 000010b0 6e 67 20 28 35 29 20 20 20 20 20 22 27 27 22 74 |ng (5) "''"t| 000010c0 68 65 20 6c 69 67 68 74 2e 22 0d 05 64 19 ef 32 |he light."..d..2| 000010d0 38 2c 32 39 2c 32 36 2c 33 39 2c 33 3a fb 31 32 |8,29,26,39,3:.12| 000010e0 39 3a db 0d 05 6e 0d f1 27 22 57 4f 52 44 53 22 |9:...n..'"WORDS"| 000010f0 0d 05 78 41 f1 27 22 41 2e 2e 73 68 61 64 6f 77 |..xA.'"A..shadow| 00001100 22 27 27 22 42 2e 2e 73 6d 61 6c 6c 22 27 27 22 |"''"B..small"''"| 00001110 43 2e 2e 62 69 67 22 27 27 22 44 2e 2e 6e 65 61 |C..big"''"D..nea| 00001120 72 22 27 27 22 45 2e 2e 64 69 73 74 61 6e 63 65 |r"''"E..distance| 00001130 22 0d 05 82 3e f1 22 46 2e 2e 6c 69 67 68 74 22 |"...>."F..light"| 00001140 27 27 22 47 2e 2e 6f 62 6a 65 63 74 22 27 27 22 |''"G..object"''"| 00001150 48 2e 2e 73 75 6e 22 27 27 22 49 2e 2e 72 61 79 |H..sun"''"I..ray| 00001160 73 22 27 27 22 4a 2e 2e 63 6f 6c 6f 75 72 22 0d |s"''"J..colour".| 00001170 05 8c 0c ef 32 36 3a fb 31 32 38 0d 05 96 29 f1 |....26:.128...).| 00001180 8a 30 2c 32 32 29 22 3d 3d 3d 3d 3d 3d 3d 3d 3d |.0,22)"=========| 00001190 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d 3d |================| 000011a0 3d 3d 22 20 0d 05 a0 08 fb 31 32 38 0d 05 aa 0b |==" .....128....| 000011b0 e3 4e 25 3d 31 b8 35 0d 05 b4 37 f1 8a 30 2c 32 |.N%=1.5...7..0,2| 000011c0 36 29 22 53 65 6c 65 63 74 20 6c 65 74 74 65 72 |6)"Select letter| 000011d0 20 6f 66 20 77 6f 72 64 20 66 6f 72 22 27 27 22 | of word for"''"| 000011e0 70 6f 73 69 74 69 6f 6e 20 22 3b 4e 25 3b 0d 05 |position ";N%;..| 000011f0 be 10 e8 22 20 22 3b 6c 65 74 74 65 72 24 0d 05 |..." ";letter$..| 00001200 c8 3a e7 20 97 28 6c 65 74 74 65 72 24 29 3c 36 |.:. .(letter$)<6| 00001210 35 20 84 20 97 28 6c 65 74 74 65 72 24 29 3e 37 |5 . .(letter$)>7| 00001220 35 20 8c 20 f1 8a 30 2c 32 36 29 3b 89 28 31 32 |5 . ..0,26);.(12| 00001230 30 29 3a e5 8d 74 74 45 0d 05 d2 08 fb 31 32 39 |0):..ttE.....129| 00001240 0d 05 dc 28 f1 8a 58 25 28 4e 25 29 2c 59 25 28 |...(..X%(N%),Y%(| 00001250 4e 25 29 29 77 6f 72 64 24 28 97 28 6c 65 74 74 |N%))word$(.(lett| 00001260 65 72 24 29 2d 36 34 29 0d 05 e6 36 e7 77 6f 72 |er$)-64)...6.wor| 00001270 64 24 28 97 28 6c 65 74 74 65 72 24 29 2d 36 34 |d$(.(letter$)-64| 00001280 29 3d 63 6f 72 72 65 63 74 24 28 4e 25 29 20 73 |)=correct$(N%) s| 00001290 63 6f 72 65 25 3d 73 63 6f 72 65 25 2b 31 0d 05 |core%=score%+1..| 000012a0 f0 08 fb 31 32 38 0d 05 fa 12 f1 8a 30 2c 32 36 |...128......0,26| 000012b0 29 3b 89 28 31 32 30 29 0d 06 04 05 ed 0d 06 0e |);.(120)........| 000012c0 2e f1 8a 30 2c 32 36 29 22 59 6f 75 20 67 6f 74 |...0,26)"You got| 000012d0 20 22 3b 73 63 6f 72 65 25 3b 22 20 77 6f 72 64 | ";score%;" word| 000012e0 73 20 63 6f 72 72 65 63 74 2e 22 0d 06 18 55 e7 |s correct."...U.| 000012f0 20 73 63 6f 72 65 25 3c 35 20 f1 8a 30 2c 32 38 | score%<5 ..0,28| 00001300 29 22 50 72 65 73 73 20 73 70 61 63 65 20 74 6f |)"Press space to| 00001310 20 63 6f 6e 74 69 6e 75 65 20 69 6e 76 65 73 74 | continue invest| 00001320 69 67 61 74 69 6e 67 2e 22 3a f5 fd a5 3d 33 32 |igating.":...=32| 00001330 3a f2 73 65 74 75 70 61 3a f2 6d 65 6e 75 3a e1 |:.setupa:.menu:.| 00001340 0d 06 22 63 e7 20 73 63 6f 72 65 25 3d 35 20 f1 |.."c. score%=5 .| 00001350 8a 30 2c 32 38 29 22 59 6f 75 20 75 6e 64 65 72 |.0,28)"You under| 00001360 73 74 61 6e 64 20 73 68 61 64 6f 77 73 2e 22 27 |stand shadows."'| 00001370 27 22 50 72 65 73 73 20 73 70 61 63 65 20 66 6f |'"Press space fo| 00001380 72 20 6e 65 78 74 20 70 65 72 73 6f 6e 20 74 6f |r next person to| 00001390 20 73 74 61 72 74 2e 22 3a f5 fd a5 3d 33 32 3a | start.":...=32:| 000013a0 d8 3a f9 0d 06 2c 05 e1 0d 06 36 13 f4 20 45 52 |.:...,....6.. ER| 000013b0 52 4f 52 20 48 41 4e 44 4c 45 52 0d 06 40 09 2a |ROR HANDLER..@.*| 000013c0 46 58 31 32 0d 06 4a 06 eb 36 0d 06 54 14 f6 3a |FX12..J..6..T..:| 000013d0 f1 22 20 61 74 20 6c 69 6e 65 20 22 3b 9e 0d 06 |." at line ";...| 000013e0 5e 05 e0 0d 06 68 40 dc 73 68 61 64 6f 77 2c 73 |^....h@.shadow,s| 000013f0 6d 61 6c 6c 2c 62 69 67 2c 6e 65 61 72 2c 64 69 |mall,big,near,di| 00001400 73 74 61 6e 63 65 2c 6c 69 67 68 74 2c 6f 62 6a |stance,light,obj| 00001410 65 63 74 2c 73 75 6e 2c 72 61 79 73 2c 63 6f 6c |ect,sun,rays,col| 00001420 6f 75 72 0d 06 72 3e dc 33 2c 38 2c 73 6d 61 6c |our..r>.3,8,smal| 00001430 6c 2c 31 39 2c 38 2c 64 69 73 74 61 6e 63 65 2c |l,19,8,distance,| 00001440 38 2c 31 36 2c 6c 69 67 68 74 2c 30 2c 31 38 2c |8,16,light,0,18,| 00001450 6f 62 6a 65 63 74 2c 31 35 2c 31 38 2c 6e 65 61 |object,15,18,nea| 00001460 72 0d 06 7c 27 f4 20 44 4f 57 4e 20 4c 4f 41 44 |r..|'. DOWN LOAD| 00001470 20 4d 45 4d 4f 52 59 20 46 4f 52 20 44 49 53 43 | MEMORY FOR DISC| 00001480 20 53 59 53 54 45 4d 53 0d 06 86 09 2a 54 41 50 | SYSTEMS....*TAP| 00001490 45 0d 06 90 44 e3 20 49 25 3d 30 20 b8 20 b8 50 |E...D. I%=0 . .P| 000014a0 2d 90 20 88 20 34 3a 49 25 21 26 45 30 30 3d 49 |-. . 4:I%!&E00=I| 000014b0 25 21 90 3a ed 3a 3f 26 31 33 3d 3f 26 31 33 2d |%!.:.:?&13=?&13-| 000014c0 28 90 2d 26 45 30 30 29 81 32 35 36 3a d0 3d 26 |(.-&E00).256:.=&| 000014d0 45 30 30 3a f9 0d ff |E00:...| 000014d7