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shipwren/PT/PTDemo

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 » Personal collection » Acorn hard disk » misc » misc3
Filename: shipwren/PT/PTDemo
Read OK:
File size: 08B4 bytes
Load address: 0000
Exec address: 0000
File contents
   10 REM  Programming Technique Demo                 by Dominic Ford 1997
   20 :
   30 REPEAT MODE 4
   40 PRINT'"Programming Technique: Graphics Tutorial";
   50 PRINT"          by Dominic Ford 1997"''
   60 PRINT"Please Select:"''"1. Difference between flashing black/"'"   white and flashing white/black"''"2. Black stripes in MODE 6"''"3. User defined characters versus"'"   conventional graphics"''"4. Colour cycling"
   70 PRINT'"5. Exit"
   80 REPEAT k$=GET$:UNTIL INSTR("12345",k$)<>0
   90 IF k$="1" THEN PROCflash
  100 IF k$="2" THEN MODE 6:PROCstripes
  110 IF k$="3" THEN MODE1:PROCgraphic
  120 IF k$="4" THEN MODE2:PROCcycle
  130 UNTIL k$="5"
  140 MODE 6:END
  150 :
  160 DEFPROCflash
  170 VDU 19,0,8,0,0,0,19,1,15,0,0,0
  180 PRINT''"Notice that the text (flashing white/   black) is always the opposite colour    from the background (flashing black/    white."'"Press <SPACE>"
  190 REPEAT UNTIL INKEY(-99)
  200 ENDPROC
  210 :
  220 DEFPROCstripes
  230 VDU 19,0,1,0,0,0,19,7,0,0,0,0
  240 PRINT''''"Notice the black stripes between the    lines of text."'"Press <SPACE>"
  250 REPEAT UNTIL INKEY(-99)
  260 ENDPROC
  270 :
  280 DEFPROCgraphic
  290 PRINT"Stage 1: Large area, no detail"
  300 T=TIME:VDU23,255,255,255,255,255,255,255,255,255:COLOUR 1
  310 FORx=0 TO 9:FOR y=2 TO 11
  320 PRINTTAB(x,y)CHR$255;
  330 NEXT,:T=TIME-T
  340 COLOUR 3:PRINTTAB(0,15)"USER DEFINED CHARS: ";T/50;"s"
  350 :
  360 T=TIME:GCOL0,1
  370 MOVE640,960:MOVE960,960:PLOT85,640,640:PLOT85,960,640
  380 T=TIME-T:PRINTTAB(0,17)"GRAPHICS: ";T/50;"s"'
  390 PRINT"For large areas with no detail, use     graphics commands to maximise speed"''"Press <SPACE>"
  400 REPEAT UNTIL INKEY(-99)
  410 :
  420 CLS:PRINT"Stage 2: Large area, much detail"
  430 T=TIME:VDU23,255,103,231,231,0,0,231,231,231:COLOUR 1
  440 FORx=0 TO 9:FOR y=2 TO 11
  450 PRINTTAB(x,y)CHR$255;
  460 NEXT,:T=TIME-T
  470 COLOUR 3:PRINTTAB(0,15)"USER DEFINED CHARS: ";T/50;"s"
  480 :
  490 T=TIME:GCOL0,1
  500 MOVE640,960:MOVE960,960:PLOT85,640,640:PLOT85,960,640
  510 GCOL0,0:FORx=652 TO 944 STEP 32:MOVEx,640:DRAWx,960:MOVEx+4,640:DRAWx+4,960:NEXT
  520 FORy=652 TO 944 STEP 32:MOVE640,y:DRAW960,y:MOVE640,y+4:DRAW960,y+4:NEXT
  530 FORx=640 TO 960 STEP 32:FORy=640 TO 960 STEP 32:MOVEx,y:DRAWx,y:NEXT,
  540 T=TIME-T:PRINTTAB(0,17)"GRAPHICS: ";T/50;"s"'
  550 PRINT"For large areas with much detail, use   user defined characters to maximise     speed"''"Press <SPACE>"
  560 REPEAT UNTIL NOT INKEY(-99)
  570 REPEAT UNTIL INKEY(-99)
  580 ENDPROC
  590 :
  600 DEFPROCcycle
  610 FORr=0 TO 15:GCOL0,r:MOVE0,r*64:MOVE1280,r*64:PLOT85,0,64+r*64:PLOT85,1280,64+r*64:NEXT
  620 :
  630 REPEAT
  640 FORr=0 TO 15:VDU19,r,7,0,0,0
  650 T=TIME:REPEAT UNTIL TIME>T+10
  660 NEXT
  670 :
  680 FORr=15 TO 0 STEP -1:VDU19,r,0,0,0,0
  690 T=TIME:REPEAT UNTIL TIME>T+10
  700 NEXT
  710 UNTIL INKEY(-99)
  720 ENDPROC

G �  Programming Technique Demo                 by Dominic Ford 1997
 :

 � � 4
(2 �'"Programming Technique: Graphics Tutorial";
2( �"          by Dominic Ford 1997"''
<� �"Please Select:"''"1. Difference between flashing black/"'"   white and flashing white/black"''"2. Black stripes in MODE 6"''"3. User defined characters versus"'"   conventional graphics"''"4. Colour cycling"
F �'"5. Exit"
P � k$=�:� �"12345",k$)<>0
Z � k$="1" � �flash
d � k$="2" � � 6:�stripes
n � k$="3" � �1:�graphic
x � k$="4" � �2:�cycle
�
 � k$="5"
�
 � 6:�
� :
� ��flash
�! � 19,0,8,0,0,0,19,1,15,0,0,0
�� �''"Notice that the text (flashing white/   black) is always the opposite colour    from the background (flashing black/    white."'"Press <SPACE>"
� � � �(-99)
� �
� :
� ��stripes
�  � 19,0,1,0,0,0,19,7,0,0,0,0
�R �''''"Notice the black stripes between the    lines of text."'"Press <SPACE>"
� � � �(-99)
 �
 :
 ��graphic
"& �"Stage 1: Large area, no detail"
,4 T=�:�23,255,255,255,255,255,255,255,255,255:� 1
6 �x=0 � 9:� y=2 � 11
@ �x,y)�255;
J
 �,:T=�-T
T/ � 3:�0,15)"USER DEFINED CHARS: ";T/50;"s"
^ :
h
 T=�:�0,1
r. �640,960:�960,960:�85,640,640:�85,960,640
|( T=�-T:�0,17)"GRAPHICS: ";T/50;"s"'
�d �"For large areas with no detail, use     graphics commands to maximise speed"''"Press <SPACE>"
� � � �(-99)
� :
�* �:�"Stage 2: Large area, much detail"
�0 T=�:�23,255,103,231,231,0,0,231,231,231:� 1
� �x=0 � 9:� y=2 � 11
� �x,y)�255;
�
 �,:T=�-T
�/ � 3:�0,15)"USER DEFINED CHARS: ";T/50;"s"
� :
�
 T=�:�0,1
�. �640,960:�960,960:�85,640,640:�85,960,640
�= �0,0:�x=652 � 944 � 32:�x,640:�x,960:�x+4,640:�x+4,960:�
8 �y=652 � 944 � 32:�640,y:�960,y:�640,y+4:�960,y+4:�
5 �x=640 � 960 � 32:�y=640 � 960 � 32:�x,y:�x,y:�,
( T=�-T:�0,17)"GRAPHICS: ";T/50;"s"'
&n �"For large areas with much detail, use   user defined characters to maximise     speed"''"Press <SPACE>"
0 � � � �(-99)
: � � �(-99)
D �
N :
X ��cycle
bG �r=0 � 15:�0,r:�0,r*64:�1280,r*64:�85,0,64+r*64:�85,1280,64+r*64:�
l :
v �
� �r=0 � 15:�19,r,7,0,0,0
� T=�:� � �>T+10
� �
� :
�! �r=15 � 0 � -1:�19,r,0,0,0,0
� T=�:� � �>T+10
� �
�
 � �(-99)
� �
�
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00000010  69 6e 67 20 54 65 63 68  6e 69 71 75 65 20 44 65  |ing Technique De|
00000020  6d 6f 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |mo              |
00000030  20 20 20 62 79 20 44 6f  6d 69 6e 69 63 20 46 6f  |   by Dominic Fo|
00000040  72 64 20 31 39 39 37 0d  00 14 06 20 3a 0d 00 1e  |rd 1997.... :...|
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00000080  75 74 6f 72 69 61 6c 22  3b 0d 00 32 28 20 f1 22  |utorial";..2( ."|
00000090  20 20 20 20 20 20 20 20  20 20 62 79 20 44 6f 6d  |          by Dom|
000000a0  69 6e 69 63 20 46 6f 72  64 20 31 39 39 37 22 27  |inic Ford 1997"'|
000000b0  27 0d 00 3c d6 20 f1 22  50 6c 65 61 73 65 20 53  |'..<. ."Please S|
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000000e0  66 6c 61 73 68 69 6e 67  20 62 6c 61 63 6b 2f 22  |flashing black/"|
000000f0  27 22 20 20 20 77 68 69  74 65 20 61 6e 64 20 66  |'"   white and f|
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00000110  61 63 6b 22 27 27 22 32  2e 20 42 6c 61 63 6b 20  |ack"''"2. Black |
00000120  73 74 72 69 70 65 73 20  69 6e 20 4d 4f 44 45 20  |stripes in MODE |
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000001c0  22 20 8c 20 f2 66 6c 61  73 68 0d 00 64 1c 20 e7  |" . .flash..d. .|
000001d0  20 6b 24 3d 22 32 22 20  8c 20 eb 20 36 3a f2 73  | k$="2" . . 6:.s|
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00000850  20 fd 20 91 3e 54 2b 31  30 0d 02 94 06 20 ed 0d  | . .>T+10.... ..|
00000860  02 9e 06 20 3a 0d 02 a8  21 20 e3 72 3d 31 35 20  |... :...! .r=15 |
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000008a0  02 c6 0d 20 fd 20 a6 28  2d 39 39 29 0d 02 d0 06  |... . .(-99)....|
000008b0  20 e1 0d ff                                       | ...|
000008b4