The kernel actually contains code to do DMA output to the parallel port,
no need to rewrite that support yourself.
Quoted from Damian Parus on Fri, Mar 28, 2003 at 08:51:24AM +0100.
> I must write program which send data to paraller port via DMA. I switch in
> bios paraller port mode to ECP, but how i must send data to port? I know
> that i must use set_dma_addr(), enable_dma() etc functions, but, for
> example, which dma channel I must use? Wihich address must be in
> set_dma_addr()? And finally, wihich function I must use to write to port
> :)? Only write to memory? Maybe someone have source of program for
> Sorry for my english, is not very well, but I'm from Poland and... I know,
> I know, I should learn :(
> Thanks for help,
> Damian Parus
> PS. Sorry for my second email (possibly) but I'm not sure that I Was send
> that previous time... Sorry.
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