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Twilight/Testing

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.

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Filename: Twilight/Testing
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File contents
Twilight Programmers Reference Disc
Testing effects


Effects should be tested in 2, 4 and 16 colour modes (try 0, 8 & 12). If you
have access to a multisync monitor, try it in multisync modes. Test this
when the effect is selected (i.e. proper screen saving not demo mode) so
that you get the different modes.

You should check your effect works when it is being used to save the screen
and in demo mode as these work in different processor modes.

You should check it works with different sets of parameters, especially the
extreme ends of their range.

You may find it helpful to use the TwPlayer application for testing the
effect as you write it. However, it only uses one processor mode and the
default parameters, so you will need to use the Twilight application for
final testing of both processor modes and different parameters.

00000000  54 77 69 6c 69 67 68 74  20 50 72 6f 67 72 61 6d  |Twilight Program|
00000010  6d 65 72 73 20 52 65 66  65 72 65 6e 63 65 20 44  |mers Reference D|
00000020  69 73 63 0a 54 65 73 74  69 6e 67 20 65 66 66 65  |isc.Testing effe|
00000030  63 74 73 0a 0a 0a 45 66  66 65 63 74 73 20 73 68  |cts...Effects sh|
00000040  6f 75 6c 64 20 62 65 20  74 65 73 74 65 64 20 69  |ould be tested i|
00000050  6e 20 32 2c 20 34 20 61  6e 64 20 31 36 20 63 6f  |n 2, 4 and 16 co|
00000060  6c 6f 75 72 20 6d 6f 64  65 73 20 28 74 72 79 20  |lour modes (try |
00000070  30 2c 20 38 20 26 20 31  32 29 2e 20 49 66 20 79  |0, 8 & 12). If y|
00000080  6f 75 0a 68 61 76 65 20  61 63 63 65 73 73 20 74  |ou.have access t|
00000090  6f 20 61 20 6d 75 6c 74  69 73 79 6e 63 20 6d 6f  |o a multisync mo|
000000a0  6e 69 74 6f 72 2c 20 74  72 79 20 69 74 20 69 6e  |nitor, try it in|
000000b0  20 6d 75 6c 74 69 73 79  6e 63 20 6d 6f 64 65 73  | multisync modes|
000000c0  2e 20 54 65 73 74 20 74  68 69 73 0a 77 68 65 6e  |. Test this.when|
000000d0  20 74 68 65 20 65 66 66  65 63 74 20 69 73 20 73  | the effect is s|
000000e0  65 6c 65 63 74 65 64 20  28 69 2e 65 2e 20 70 72  |elected (i.e. pr|
000000f0  6f 70 65 72 20 73 63 72  65 65 6e 20 73 61 76 69  |oper screen savi|
00000100  6e 67 20 6e 6f 74 20 64  65 6d 6f 20 6d 6f 64 65  |ng not demo mode|
00000110  29 20 73 6f 0a 74 68 61  74 20 79 6f 75 20 67 65  |) so.that you ge|
00000120  74 20 74 68 65 20 64 69  66 66 65 72 65 6e 74 20  |t the different |
00000130  6d 6f 64 65 73 2e 0a 0a  59 6f 75 20 73 68 6f 75  |modes...You shou|
00000140  6c 64 20 63 68 65 63 6b  20 79 6f 75 72 20 65 66  |ld check your ef|
00000150  66 65 63 74 20 77 6f 72  6b 73 20 77 68 65 6e 20  |fect works when |
00000160  69 74 20 69 73 20 62 65  69 6e 67 20 75 73 65 64  |it is being used|
00000170  20 74 6f 20 73 61 76 65  20 74 68 65 20 73 63 72  | to save the scr|
00000180  65 65 6e 0a 61 6e 64 20  69 6e 20 64 65 6d 6f 20  |een.and in demo |
00000190  6d 6f 64 65 20 61 73 20  74 68 65 73 65 20 77 6f  |mode as these wo|
000001a0  72 6b 20 69 6e 20 64 69  66 66 65 72 65 6e 74 20  |rk in different |
000001b0  70 72 6f 63 65 73 73 6f  72 20 6d 6f 64 65 73 2e  |processor modes.|
000001c0  0a 0a 59 6f 75 20 73 68  6f 75 6c 64 20 63 68 65  |..You should che|
000001d0  63 6b 20 69 74 20 77 6f  72 6b 73 20 77 69 74 68  |ck it works with|
000001e0  20 64 69 66 66 65 72 65  6e 74 20 73 65 74 73 20  | different sets |
000001f0  6f 66 20 70 61 72 61 6d  65 74 65 72 73 2c 20 65  |of parameters, e|
00000200  73 70 65 63 69 61 6c 6c  79 20 74 68 65 0a 65 78  |specially the.ex|
00000210  74 72 65 6d 65 20 65 6e  64 73 20 6f 66 20 74 68  |treme ends of th|
00000220  65 69 72 20 72 61 6e 67  65 2e 0a 0a 59 6f 75 20  |eir range...You |
00000230  6d 61 79 20 66 69 6e 64  20 69 74 20 68 65 6c 70  |may find it help|
00000240  66 75 6c 20 74 6f 20 75  73 65 20 74 68 65 20 54  |ful to use the T|
00000250  77 50 6c 61 79 65 72 20  61 70 70 6c 69 63 61 74  |wPlayer applicat|
00000260  69 6f 6e 20 66 6f 72 20  74 65 73 74 69 6e 67 20  |ion for testing |
00000270  74 68 65 0a 65 66 66 65  63 74 20 61 73 20 79 6f  |the.effect as yo|
00000280  75 20 77 72 69 74 65 20  69 74 2e 20 48 6f 77 65  |u write it. Howe|
00000290  76 65 72 2c 20 69 74 20  6f 6e 6c 79 20 75 73 65  |ver, it only use|
000002a0  73 20 6f 6e 65 20 70 72  6f 63 65 73 73 6f 72 20  |s one processor |
000002b0  6d 6f 64 65 20 61 6e 64  20 74 68 65 0a 64 65 66  |mode and the.def|
000002c0  61 75 6c 74 20 70 61 72  61 6d 65 74 65 72 73 2c  |ault parameters,|
000002d0  20 73 6f 20 79 6f 75 20  77 69 6c 6c 20 6e 65 65  | so you will nee|
000002e0  64 20 74 6f 20 75 73 65  20 74 68 65 20 54 77 69  |d to use the Twi|
000002f0  6c 69 67 68 74 20 61 70  70 6c 69 63 61 74 69 6f  |light applicatio|
00000300  6e 20 66 6f 72 0a 66 69  6e 61 6c 20 74 65 73 74  |n for.final test|
00000310  69 6e 67 20 6f 66 20 62  6f 74 68 20 70 72 6f 63  |ing of both proc|
00000320  65 73 73 6f 72 20 6d 6f  64 65 73 20 61 6e 64 20  |essor modes and |
00000330  64 69 66 66 65 72 65 6e  74 20 70 61 72 61 6d 65  |different parame|
00000340  74 65 72 73 2e 0a 0a                              |ters...|
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