Re: [pci] How to start PCI BURST - Bus Mastering

[gustaw47@poczta.onet.pl]

Thank you for answer.
I have studied many sources and PDFs and it seems that Bus-Mastering 
will be the fastest solution to transfer data to Motherboard.

So my card have to assert REQ# signal, wait for GNT#, then put 
MEMORY WRITE command and correct Addres on BUS and so on.

But I see one problem : how to translate software addres to phisical 
addres ? My testing software is in Real-mode assembler, uses [es:di] 
addresing for buffer. How to translate this [es:di] do correct AD0..AD31 
signals on BUS ?

> 
> Hi All 
>  I am developping a PCI-CARD. I need to read lots of data from it 
> with   burst. 
>  This is almost impossible on a WinTel-type machine. 
> 
> The problem is, when I execute instruction on my PC: 
>  mov cx,8 
>  rep movsd 
>  - pci bridge reads not in burst mode, but word by word: reads one 
> word  waits 450 ns, and reads next word and so on. This is definitely 
> too slow !  How can I make it faster ? 

>  Add master-moding to your PCI controller and burst write the data 
> to the destination rather than attempt to read the data. 
> 
> 
> What should I write to which PCI bridge PORT on motherboard, to 
> enable  Burst transaction ? 
>  This will probably not help. 
> 
>
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