Floppy Drive Controller Help!!!!!

[Guest_imported]

I am using the FDC's ports to get it to read a sector off of the floppy drive in protected mode. I sucessfully can turn it on, wait for it to get up to speed, recalibrate, and then issue the read command for either non-dma or dma transfer... then read the 7 status(I think) bytes from the data register 03F5h. But I need to know how to set up DMA in protected mode, and if not using DMA where is the LILO that I should read from?

Thanks,
~`DarkEyes`~

 

[shahzaad]

hi,
i'm also working on floppy driver.i've some code for involving DMA for disk i/o.i also need ur help on some initial steps of building floppy disk driver.
why don't u email me.

 

[straiph]

hmm, i know a little about this but not alot

when you perform a sector read or write - i beleive it works something liek this - initialise drive for read/write, during process: the floppy controller fires an interrupt for each byte of a sector and you need a short routine to either read/write the data port. once the whole sector has been read/written then do final routine.

this little ISR is great because it promotes multitasking.

i downloaded a datadsheet on the stadard controller 82077AA - im just trying to find the URL. its great - it covers all aspects of programming the controller.

if i find it ill post the URL here




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