Dear sir,
Can u give info abt Buddy's and Page Algorithm - where can I get details abt the implementation of these
Regards
Deepika
On Sat, 25 Dec 2004 SHASHI DHAR wrote :
>Memory Maped I/O
>There r three ways of writing I/O to a dDevice.
>1. Progarrmed I/O
>2. DMA
>3. Memory Mapped I/O
>In memory Mapped I/O base adress of the device is mapped to a memory location in RAM. So that u can directly access the device by reading and writing directly to that portion of RAM.
>Ex: Suppose I got a device having 6 registers with offset 0h,1h....5h and memory and other components of device is from 6h to 200h.
>what i'll do is now I'll map base address to some portion of RAM.So to write or set value in Reg 2 i'll write directly to memory location BASEADD+offset (offset is 2 in this case, multiply it by two to get 16 bit registers) and similarly we can read from the location. which in turn will either read or write from the device. Setting of baseaddress is BUS and design specific.
>Regards
>Shashi Dahr
>R&D Engineer
>WESEE, R&D Wing
>Ministry of Defence
>�
>>From: "Deepika Rani" <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] >Subject: (PT) (unknown) >Date: 24 Dec 2004 13:34:12 -0000 > > Hey, >can anyone tell me what is memory mapped I/O > >Regards >Deepika
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