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Exposé Carte MèRe : hadi ila wehelti ;)TheCrazyMan
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Speakers:
Date: September 29, 2016
★ Session Description ★
ARM Trusted Firmware has established itself as a key part of the ARMv8-A software stack. Broadening its applicability across all segments, from embedded to enterprise, is challenging. This session discusses the latest developments, including extension into the 32-bit space.
★ Resources ★
Etherpad: pad.linaro.org/p/las16-402
Presentations & Videos: http://connect.linaro.org/resource/las16/las16-402/
★ Event Details ★
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September 26-30, 2016
http://www.linaro.org
http://connect.linaro.org
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Jagan Teki - U-boot from scratchlinuxlab_confU-Boot project has evolved in the time span of over 17 years and so as its complexity and its uses. This has made it a daunting task in getting started with its development and uses. This talk will address all these issues start with overview, features, efforts created by community and future plans.
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مقدمة فى الحاسب الالىguest98ae80يعرض مكونات الحاسب المادية والبرمجية
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المهمه الرابعهaya gamilتعريف القرص الصلب ال Hard Disk بأنه وحدة تخزين للبيانات بجميع أنواعها، وسمي صلبا لأنه مصنوع من مواد صلبة وليست لينة، ويكون مثبتا بداخل الحاسوب وعادة يتكون من أقراص ممغنطة بداخله، ومن خلال رأس مثبتة بداخله عبارة عن لاقط كهرومغناطيسي يقوم بدور قراءة تلك البيانات المخزنة، وعادة يأتي بسعات مختلفة حسب الشركة المصنعة له، هو الجزء الأساسي من بنية الحاسوب والمسؤول عن التخزين الطويل الأمد للبيانات حتى في حالة انقطاع التيار الكهربائي عن الجهاز فهو يقوم بقراءة وتسجيل البيانات بطريقه إلكترونية حیث بإمكانه تخزین كمیة كبیرة من البيانات والمعلومات بالإضافة إلى إمكانية قراءة المعلومات و البيانات بصورة اسرع بكثير من أجهزة تخزين البيانات الأخرى مثل CD-ROM و Tap drives وغيرها من الوسائل التخزينية الأخرى كما أن الغالبية العظمى من المساحة التخزينية تستخدم لحفظ البرامج و تخزينها مثل أنظمة التشغيل المختلفة والبرمجيات المتنوعة والملفات الشخصية
المهمه الرابعهaya gamilتعريف القرص الصلب ال Hard Disk بأنه وحدة تخزين للبيانات بجميع أنواعها، وسمي صلبا لأنه مصنوع من مواد صلبة وليست لينة، ويكون مثبتا بداخل الحاسوب وعادة يتكون من أقراص ممغنطة بداخله، ومن خلال رأس مثبتة بداخله عبارة عن لاقط كهرومغناطيسي يقوم بدور قراءة تلك البيانات المخزنة، وعادة يأتي بسعات مختلفة حسب الشركة المصنعة له، هو الجزء الأساسي من بنية الحاسوب والمسؤول عن التخزين الطويل الأمد للبيانات حتى في حالة انقطاع التيار الكهربائي عن الجهاز فهو يقوم بقراءة وتسجيل البيانات بطريقه إلكترونية حیث بإمكانه تخزین كمیة كبیرة من البيانات والمعلومات بالإضافة إلى إمكانية قراءة المعلومات و البيانات بصورة اسرع بكثير من أجهزة تخزين البيانات الأخرى مثل CD-ROM و Tap drives وغيرها من الوسائل التخزينية الأخرى كما أن الغالبية العظمى من المساحة التخزينية تستخدم لحفظ البرامج و تخزينها مثل أنظمة التشغيل المختلفة والبرمجيات المتنوعة والملفات الشخصية
2. وحدة التخزين الرئيسية
محركات الرقراص Disk Drives
تحتوي وحدة النظام الرئيسية على مجموعة من مشغلت ومحركات الرقراص المختلفة والتي ترتبط
ارتباطا مباشرا باللوحة الم عن طريق وصلت سلكية. ويتم تثبيت الوصلت الخاصة بمحركات
ً
ً
الرقراص باللوحة الم بمقابس خاصة لذلك، فهناك مقبس خاص لتوصيل القرص المرن Floppy
Disk driveومقبسان لتوصيل محركات الرقراص المدمجة مثل أرقراص الـ CD-ROMوأرقراص
الـ DVDوالرقراص الصلبة.
محرك الرقراص الصلبة
محرك الرقراص المدمجة
محرك الرقراص المرنة
2
3. وحدة التخزين الثانوية
Storage Unit
تقوم هذه الوحدة بدعم ذاكرة الحاسوب الساسية بحفظ البيانات
والمعلومات بصورة دائمة بحيث يمكن الرجوع إليها مستقبل .
ومن أمثلة وحدة التخزين الثانوية :-
.1
جهاز القرص المرن . Floppy Disk
2. جهاز القرص الثابت . Hard Disk
3. جهاز رقاري الرقراص الضوئية . Cd-Rom
3
4. محرك القرص الصلب
يعتبر القرص الصلب الجهاز الرئيسي الذي
يستخدمه الكمبيوتر لحفظ المعلومات
وتخزينها بصورة دائمة ,
وتشتمل معظم أجهزة
الحاسوب على رقرص
صلب واحد يوجد داخل
الحاسوب .
4
5. محرك السي دي روم
CD-ROM
هو جهاز يقرأ المعلومات المحفوظة على القراص المدمجة
)السي دي روم ( , CD-ROMونعني بالقرص المدمج
السي دي روم ذاكرة القراءة فقط أي
أنه ليمكن الكتابة على القرص المدمج
أو تغيير المعلومات المخزنة فيه .
وتوجد معظم محركات أقراص السي
دي روم داخل الحاسوب .
5
6. وحدات التخزين الثانوية Secondary Storage
Units
.ً
.تخزن بها البيانات التي ل تطلبها وحدة المعالجة فوريا
.تكون موجودة داخل صندوق النظام أو خارجه
أنواع وحدات التخزين :
1- محرك الرقراص المرنة): (Floppy Disk
ويقوم بتخزين البيانات على رقرص بلتستيكي ، يبلغ رقطره 5.3
بوصه.
7. وحدات التخزين الثانوية Secondary Storage Units
أنواع وحدات التخزين :
2- جهاز القرص الصلب ): (Hard Disk
. يسمى أحيانا بالقرص الثابت
.ً
. يتميز عن محرك الرقراص المرنة بسرعة رقراءة البيانات
:تختلف أجهزة القرص الصلب بحسب
1- موضعه داخل الصندوق أو خارجه
2- تسعة التخزين 04 , 08 , 002 جيجا بايت
8. وحدات التخزين الثانوية Secondary Storage Units
أنواع وحدات التخزين :
3- محرك الرقراص المدمجة): (CD
يقوم بقراءة البيانات من أرقراص مكونة من مادة
عاكسة للضوء يمكن نقلها وحملها .
: ةجمدملا صارقألا كرحم نم ناعون كانهناك نوعان من محرك الرقراص المدمجة
1- يقرأ الرقراص ول يسمح بالكتابة عليه ويسمى
رقارئ الرقراص الضوئية) (CD- ROM
2- يقرأ الرقراص ويسمح بالكتابة عليها ويسمى بكاتب
الرقراص الضوئية) (CD- WRITTER
الرقراص التي يسمح بالكتابة عليها فهي على نوعين :
أرقراص تسمح بالكتابة مرة واحدة وتسمى CD-R
أرقراص تسمح بالكتابة عدة مرات وتسمى CD-RW
9. وحدات التخزين الثانوية Secondary Storage Units
أنواع وحدات التخزين :
5- محرك أقراص الفيديو الرقمي ) : ( DVD Rom
.يستخدم تقنية ضوئية ) الليزر ( للتخزين
السعه التخزينية لقراصه تساوي 6. أضعاف القرص المدمج
يستخدم غالبا لتسجيل شرائط الفيديو واللعاب الكمبيوترية .
ً