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| Programming and Assembly Language Please read this Topic's rules!! |
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23rd March, 2003, 11:53 AM
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| Ignorant question. Again. Ascii? Question, please. AFAIK, pressing a key on a PC keyboard sends ASCII code to the machine. Is this code hardwired into the keyboard? Thank you for explaining this to a humble dim-bulb, if you have the time.
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23rd March, 2003, 05:19 PM
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| Actually, pressing a key on a keyboard doesn't send an ASCII code at all! How would you represent all of the special keys with ASCII codes? In terms of the hardware, pressing a key on the keyboard sends a key down message, with the scan code of the key in it. Releasing the key sends a key up message, with the scan code in it. However, not all keys have a key up message. These scan codes are fixed in the keyboard. The BIOS (or OS) in the machine will convert the scan codes into sensible characters for your application to understand. If you want to see what the scan codes look like, take a look at this web page . Áedán
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23rd March, 2003, 07:24 PM
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| Thanks George, Thanks Aidan..I just never thought about this before, interesting stuff!
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24th March, 2003, 09:50 AM
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| Quote:
 Áedán
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24th March, 2003, 01:16 PM
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| Even more fortunate that a few do! ":O}
__________________ "Though all men live in ignorance before mystery, they need not live in darkness... Justice is foundation and ETERNAL." DKE "All that we do is touched by Ocean Yet we remain on the shore of what we know." Richard Wilbur Subscribers! Ask Pitch about a Custom Sig Graphic |
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25th March, 2003, 05:08 PM
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| I wonder if there's a gulf between thinking about it and understanding it? There sure is in my house! Thank you a lot, Aedan!!
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