Working With CACHE

                Cache Memory is considered a fastest memory, not totally because of its cell structure or type of semi-conductor used, its considered fast because the response time it quick when compared to all other memories.

             One thing you must know in-order to move further is, caching of a memory is decided my MMU, so MMU and Caches are always interlinked. MMU tables will decide which part of the memory is cacheable and which are not, and the caches contains the value at that corresponding address( or virtual address).

              Normally we do two operations on cache. Cache Flush and Cache Invalidate. For those all who are new to these concepts,

Cache Flush : Writing back values(present in cache) of the mapped address to its physical memory(ddr)

Cache Invalidation : Making mapped address invalid ( undo the mapping).


            As shown in the figure you can see caches have many levels, L1 , L2, L3 and each one may also be divided into Instruction cache and Data cache.

 Caches can give trouble in some situation , i will explain some situations :

1)  If some memory area is mapped to cache and processor is working on it, and in between you do a DMA transfer to the same address. Then the new data present in real memory(ram) will not be reflected in cache as no where processor was involved in DMA transfer. So processor still keeps on working with old data present in cache.

2) If we invalidate cache without flushing it, what happens is the new calculated data present in cache will not be written back to real memory, they mean while if processor tries to access that memory result may be unknown.

12 Atoms for BIT (NANO MEMORY DRIVE)

    IBM researchers have invented a new form of data storage, where 12atoms are sufficient to store a BIT of data, where as present modern status is millions of atoms per bit. These memory chips will have capacity 100times  more than the present solid state chips.IBM researchers have successfully used 12 atoms to store a bit by aligning their magnetic properties so that the group of atoms would not interfere with their neighboring group of atoms.

    This invention will break the Moors law, which tells that no. of transistors in a micro chip will double for every two years.
 
    I your present 4gb pen-drive is made with this technology , you can store all the movies that you seen from your child hood ,or even you can have a copy of YOUTUBE in your hands.

    Researchers mention , it will consume many years to bring this innovation into the market, as the chips are to be made atom by atom using nano-technology , and the present 12atom formula works at low temperatures only(less than 5degrees). And they have said 120 atoms per bit can work under the room temperatures , which will be much much efficient then present this . Hope this era of nano-technology begins soon.

  For more reference visit the IBM research page 
  And this video from BBC will digest your quick

PAINTING LIGHT

    Hey don't worry Im alright!, "Painting light" its true its the future. Buying lights is an old idea, Painting lights is a new Idea. Yes , it became possible by OLED(Organic Light Emitting Diodes ) . These are the Organic LED's  , whose size is 1000 times smaller than than the normal LED's , made up of the thin fiber type material .
Development is still in process but recently GE has invented a method to print the Light by using the OLED's .

                                                            The Future of Television 
                                      
   By this technology in future we can have tv's which you can roll up take it any where( just like a carpet) , or a part of your wall can act a your desktop Monitor , Your mirror can show up all the messages and email for you when you wake up.

    But we have a disadvantage with this technology , on which the tech people still working to overcome,
diadvantages"
1)its life span is 1000 hours only
2)it can be damaged when its in contact with water and Oxygen

  Watch the video of GE, which doing the Project on Present Technology

TRICK TO HIDE THE FILES

                    Hi frndz , most of them would have problem in hiding your personal data in your system , today I will show you the simplest trick to hide your files in your pc just by creating a .bat file.

  Follow the 7 simple steps

 1)Open note pad 

 2)Copy the following code to it

    

   

if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK
if NOT EXIST Locker goto MDLOCKER
:CONFIRM
echo Are you sure u want to Lock the folder(Y/N)
set/p "cho=>"
if %cho%==Y goto LOCK
if %cho%==y goto LOCK
if %cho%==n goto END
if %cho%==N goto END
echo Invalid choice.
goto CONFIRM
:LOCK
ren Locker "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
echo Folder locked
goto End
:UNLOCK
echo Enter password to Unlock folder
set/p "pass=>"
if NOT %pass%==type your password here goto FAIL
attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" Locker
echo Folder Unlocked successfully
goto End
:FAIL
echo Invalid password
goto end
:MDLOCKER
md Locker
echo Locker created successfully
goto End
:End

3) Now save it with any name with ".bat " as extension 

   ex: lock.bat

4)Now double click on the bat file created , a new folder with name 'Locker' will be created.

5)Move the content which you want to hide into the Locker folder

6)Now again double click on the .bat file , now cmd window will open, now type 'y' to hide the folder

7)Repeat th step 6 to get back your hidden files.

Comment on this post if you have any problem in doing it, I can help you

thank for reading, meet you in next post :-)

PUT A BACKGROUND IMAGE FOR YOUR PENDRIVE

     Its so simple and cool trick , you can amaze your frnds and close with this, try it


 There are only three easy steps , lets get down to work now :-)

open the usb drive

and copy this code in a notepad

[{BE098140-A513-11D0-A3A4-00C04FD706EC}]
IconArea_Image=img.jpg
IconArea_Text=0×000000

save the file as desktop.ini

img.jpg write the image file name you wnt to put it as back ground
note:image must also be copied in the pendrive

I have done it

now show wheres yours? :-)

BATTERY DOWN ,THEN SHOUT!!

This is the most crazy  invention ever ,charge up up battery by yelling at it, the much u shout the much it charges



     It uses the reverse principle of a loud speaker, which coverts the electric signal to voice,
the present technology converts voice to electricty. Scientists say this technology is used up to charge up the cell phones , ipods and all other low voltage devices.
 
     The devices made so far can convert up to 1000db , which is equal to noise in traffic , a near by train noice etc.

     So if there is rock band concert nearby ,then attend it for atleast 5min!

Blogged with the Flock Browser

VIRTUAL SIM

        I future SIM card are going to be part of the museum ,yes they are of no use in the future

        With this technology a single phone can be used by many users(&one can use more than one SIM with a single mobile). In this new idea , a user name and a password will be given for the each user,by which he/she can login into a network by the user name and use the network, and the same mobile can be used by another person by his user name and password.This technology use much user friendly ,and it is reduces the cost of buying and manufacturing SIM card.

thanks for reading, see u in next post