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I have implement my floppy driver. It works with floppy-a well. But it doesnt work with floppy-b in Bochs. I mean I change the base address of floppy to set floppy b active, but it stucks when I send a command and wait for an interrupt. I mean I got an interrupt after resetting floppy a. But dont get any int after resetting floppy b. Do I have to do something to enable and read from floppy b??

floppy A and B are on the primary controller, so this should not be that diificult. btw have you enabled floopy drive B in bochsrc file?
you dont have to reset them separatley as they are on the same controller. You could post your code here and mayvbe someone will see the error.

Neo wrote: floppy A and B are on the primary controller, so this should not be that diificult. btw have you enabled floopy drive B in bochsrc file?

Yes, it shouldnt. But it did stuck when I just change the base addr from 3f0 to 370. And is this enough to enable floppy drive B in bochsrc file???

floppya: 1_44=a.img, status=inserted
floppyb: 1_44=b.img, status=inserted

autrign wrote: Yes, it shouldnt. But it did stuck when I just change the base addr from 3f0 to 370.

By doing that, you've invented an entire new floppy drive controller. As Neo says, each controller supports both drive A and B (drives C and D can also exist). So drives A and B are used through the same controller base address.

on the primary controller foppy B is drive number 1

so did it work?