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Author
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Topic: I KNOW YOU DON'T WANT TO READ THIS!! BUT PLEASE HELP ME!!! ARGH!!! STRESSED OUT EGG!!
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Lara Severi
Member Posts: 937
From:Darlington, CO Durham, England
Registered: Jan 2001
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posted 06-03-2001 06:14 AM
   
@ all,
I know this forum is about Tomb Raider and not computers but I don't know where else I can get QUICK HELP!!
The deal is I have to hand in this portfolio tomorrow and part of it, is to answer 80 questions. I have answered all of them except the three below. The last three! Please can anyone help me?? I could always try and grab a teacher tomorrow morning but I don't know if the unit teacher is in (he only comes in on Thursday’s).
I would appreciate any help at all!
I am going out of my mind here! I am REALLY, REALLY stressed and I'm not feeling to well so please try and help... 78> A) What does the term "typematic" mean?
B) Explain how the typematic rate is modified on:
1. DOS and
2. Windows NT operating systems? 79> Explain the function of the keyboard processor in an AT system operate .s. 80> A) What is key switch bounce?
B) Name the type of key switch that eliminates key switch bounce?
Lara .S. +++
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Number6
Member Posts: 60
From:CANADA
Registered: May 99
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posted 06-03-2001 07:59 AM
The answer to your first question is there http://www.faqs.org/faqs/msdos-programmer-faq/part2/section-19.html
The answer to the third question is that switches that make contact by letting a lever fall on some contact will experience lever bounce, literaly, such being caused by the shock of the contact (watch a metal penny bounce around on a concrete floor). As this lever bounces, it repeatedly closes and opens the contact thus sending a train of signal and not just one. The only mechanical switch that does not bounce is the sliding contact switch (like those old horror movie blade switches). Most electronics now have a small circuit that will let pass only the first signal and block the rest.If you want to search for your own answers (which I recommend) goto www.copernic.com and download the free search engine there. I got the answer to your first question just by searching for TYPEMATIC in about 10 sec. IP: Logged |
Lara Severi
Member Posts: 937
From:Darlington, CO Durham, England
Registered: Jan 2001
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posted 06-03-2001 02:03 PM
Thanx for the first answer but I don't think the third answer you gave me is right. It doesn't sound right. Thanx anyway. I am downloading the search engine now and hopefully I can get the answer to the second question as well.------------------
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aktrekker
Member Posts: 222
From:WA, USA
Registered: Apr 2001
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posted 06-03-2001 04:42 PM
78) A)Typematic is the process of a single keystroke auto-repeating.
B)On DOS you use a BIOS setting which programs the keyboard.
On WinNT, I believe it is some sort of registry setting. You should be able to set it by bringing up devices and selecting keyboard properties, not sure of the exact process.79) The keyboard processor handle key debouncing, multikey rollover (when you press more than one key at a time), detecting key press and release as separate events, and key repeat when a key is held down. 80) A)When a mechanical key is pressed, it bounces physically, very fast. Debouncing provides a time delay so extra presses and releases within a very short time are counted as a single press of the key.
B) Any physical switch contact will bounce. The only non-bouncing type I know of would be an electronic switch, like a transistor, being turned on and off electronically. Hope this helps. IP: Logged |
Lara Severi
Member Posts: 937
From:Darlington, CO Durham, England
Registered: Jan 2001
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posted 06-04-2001 05:20 AM
Thank you aktrekker. I love you!!!
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