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!Ignotum/!Help
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 » Archimedes archive » Archimedes World » AW-1996-07.adf » !Ignotum_Ignotum |
| Filename: | !Ignotum/!Help |
| Read OK: | ✔ |
| File size: | 0B29 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
Ignotum - A Formula Finder
by Chris Allen
We all know, or vaguely remember, the formula to find the area of a circle - PIr� - and Pythagoras's theorem to calculate the length of the hypotenuse of a right triangle - a�=b�+c�. But what about the formula to calculate the area of a triangle, voltage, resistance, velocity and all those other formulae that you learnt at school and then promptly forgot? Well help is at hand in the form of Ignotum which can best be described as a dictionary of formulae. It provides information on over 200 different formulae covering, amongst others, area, volume, differentiation, geometry, electricity, gases and motion, all suitable for both GCSE and A level studies.
To load Ignotum, double-click on its icon. Ignotum supports Acorn's interactive help on both windows and menus.
The Formula window
To display the Formula window, click on the iconbar icon. A window with three sections should appear:
Top section: this is the control panel. It displays what topic is currently selected. It also has a toggle icon for the formula information. Should you wish to change the topic you can do so by clicking on the Menu icon next to the selected topic. A menu will appear from which you can choose a new topic. When you select a topic, Ignotum will try to access the disc from which it was loaded. It does this because all the formulae are kept on disc, not in memory - there are over 200 formulae and the program would have to take up about 25k more to load them all at once. By keeping the program small, users with 1Mb systems will be able to run Ignotum alongside Impression or another text editor.
Middle section: This is the list of the formulae available for the chosen topic. To select a formula click on it with Select or Adjust. To export the formula of your choice, just drag and drop it into a Filer window to save it to disc, or straight into a word processor such as Impression or Edit. If you drag with Adjust then the Formula window will close afterwards.
Note: Using the standard system font it is sometimes difficult to express the correct mathematical symbols, therefore the following notation is used:
^ is 'to the power of' (commonly used in programming anyway)
^� is used instead of the square root sign
> is used in the differentiation section to mean 'differentiates to' rather than 'is greater than'
{ is used as the integral sign in the integration section
All the other symbols are standard, eg |x| means the modulus of x.
Bottom section - displays information on the selected formula.
To save the setup of the program so it always loads with the same set of formula displayed, set it up correctly and then select the 'Save choices' option from the iconbar menu.
To quit the application, choose the 'Quit' option from the iconbar menu.
I hope you find it useful,
Chris Allen 00000000 49 67 6e 6f 74 75 6d 20 2d 20 41 20 46 6f 72 6d |Ignotum - A Form|
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00000020 72 69 73 20 41 6c 6c 65 6e 0a 0a 57 65 20 61 6c |ris Allen..We al|
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00000040 6c 79 20 72 65 6d 65 6d 62 65 72 2c 20 74 68 65 |ly remember, the|
00000050 20 66 6f 72 6d 75 6c 61 20 74 6f 20 66 69 6e 64 | formula to find|
00000060 20 74 68 65 20 61 72 65 61 20 6f 66 20 61 20 63 | the area of a c|
00000070 69 72 63 6c 65 20 2d 20 50 49 72 b2 20 2d 20 61 |ircle - PIr. - a|
00000080 6e 64 20 50 79 74 68 61 67 6f 72 61 73 27 73 20 |nd Pythagoras's |
00000090 74 68 65 6f 72 65 6d 20 74 6f 20 63 61 6c 63 75 |theorem to calcu|
000000a0 6c 61 74 65 20 74 68 65 20 6c 65 6e 67 74 68 20 |late the length |
000000b0 6f 66 20 74 68 65 20 68 79 70 6f 74 65 6e 75 73 |of the hypotenus|
000000c0 65 20 6f 66 20 61 20 72 69 67 68 74 20 74 72 69 |e of a right tri|
000000d0 61 6e 67 6c 65 20 2d 20 61 b2 3d 62 b2 2b 63 b2 |angle - a.=b.+c.|
000000e0 2e 20 42 75 74 20 77 68 61 74 20 61 62 6f 75 74 |. But what about|
000000f0 20 74 68 65 20 66 6f 72 6d 75 6c 61 20 74 6f 20 | the formula to |
00000100 63 61 6c 63 75 6c 61 74 65 20 74 68 65 20 61 72 |calculate the ar|
00000110 65 61 20 6f 66 20 61 20 74 72 69 61 6e 67 6c 65 |ea of a triangle|
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00000130 74 61 6e 63 65 2c 20 76 65 6c 6f 63 69 74 79 20 |tance, velocity |
00000140 61 6e 64 20 61 6c 6c 20 74 68 6f 73 65 20 6f 74 |and all those ot|
00000150 68 65 72 20 66 6f 72 6d 75 6c 61 65 20 74 68 61 |her formulae tha|
00000160 74 20 79 6f 75 20 6c 65 61 72 6e 74 20 61 74 20 |t you learnt at |
00000170 73 63 68 6f 6f 6c 20 61 6e 64 20 74 68 65 6e 20 |school and then |
00000180 70 72 6f 6d 70 74 6c 79 20 66 6f 72 67 6f 74 3f |promptly forgot?|
00000190 20 57 65 6c 6c 20 68 65 6c 70 20 69 73 20 61 74 | Well help is at|
000001a0 20 68 61 6e 64 20 69 6e 20 74 68 65 20 66 6f 72 | hand in the for|
000001b0 6d 20 6f 66 20 49 67 6e 6f 74 75 6d 20 77 68 69 |m of Ignotum whi|
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00000210 20 6f 76 65 72 20 32 30 30 20 64 69 66 66 65 72 | over 200 differ|
00000220 65 6e 74 20 66 6f 72 6d 75 6c 61 65 20 63 6f 76 |ent formulae cov|
00000230 65 72 69 6e 67 2c 20 61 6d 6f 6e 67 73 74 20 6f |ering, amongst o|
00000240 74 68 65 72 73 2c 20 61 72 65 61 2c 20 76 6f 6c |thers, area, vol|
00000250 75 6d 65 2c 20 64 69 66 66 65 72 65 6e 74 69 61 |ume, differentia|
00000260 74 69 6f 6e 2c 20 67 65 6f 6d 65 74 72 79 2c 20 |tion, geometry, |
00000270 65 6c 65 63 74 72 69 63 69 74 79 2c 20 67 61 73 |electricity, gas|
00000280 65 73 20 61 6e 64 20 6d 6f 74 69 6f 6e 2c 20 61 |es and motion, a|
00000290 6c 6c 20 73 75 69 74 61 62 6c 65 20 66 6f 72 20 |ll suitable for |
000002a0 62 6f 74 68 20 47 43 53 45 20 61 6e 64 20 41 20 |both GCSE and A |
000002b0 6c 65 76 65 6c 20 73 74 75 64 69 65 73 2e 0a 0a |level studies...|
000002c0 54 6f 20 6c 6f 61 64 20 49 67 6e 6f 74 75 6d 2c |To load Ignotum,|
000002d0 20 64 6f 75 62 6c 65 2d 63 6c 69 63 6b 20 6f 6e | double-click on|
000002e0 20 69 74 73 20 69 63 6f 6e 2e 20 49 67 6e 6f 74 | its icon. Ignot|
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00000580 72 65 20 61 72 65 20 6f 76 65 72 20 32 30 30 20 |re are over 200 |
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000006c0 74 20 61 20 66 6f 72 6d 75 6c 61 20 63 6c 69 63 |t a formula clic|
000006d0 6b 20 6f 6e 20 69 74 20 77 69 74 68 20 53 65 6c |k on it with Sel|
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00000790 20 49 66 20 79 6f 75 20 64 72 61 67 20 77 69 74 | If you drag wit|
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00000910 20 27 64 69 66 66 65 72 65 6e 74 69 61 74 65 73 | 'differentiates|
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00000930 20 27 69 73 20 67 72 65 61 74 65 72 20 74 68 61 | 'is greater tha|
00000940 6e 27 0a 20 20 7b 20 20 69 73 20 75 73 65 64 20 |n'. { is used |
00000950 61 73 20 74 68 65 20 69 6e 74 65 67 72 61 6c 20 |as the integral |
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00000aa0 66 72 6f 6d 20 74 68 65 20 69 63 6f 6e 62 61 72 |from the iconbar|
00000ab0 20 6d 65 6e 75 2e 0a 0a 54 6f 20 71 75 69 74 20 | menu...To quit |
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00000ad0 20 63 68 6f 6f 73 65 20 74 68 65 20 27 51 75 69 | choose the 'Qui|
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00000b00 0a 0a 49 20 68 6f 70 65 20 79 6f 75 20 66 69 6e |..I hope you fin|
00000b10 64 20 69 74 20 75 73 65 66 75 6c 2c 0a 0a 43 68 |d it useful,..Ch|
00000b20 72 69 73 20 41 6c 6c 65 6e |ris Allen|
00000b29 
.