21 Jul
2006
21 Jul
'06
3:44 p.m.
Chuck Guzis wrote:
My guess is that your primary controller isn't
releasing the IRQ and DMA
lines when bit 2 in port 3f2 is cleared. Not all controllers do.
Unfortunately it looks like it's the secondary (although quite possibly the
primary too :-) - there's no kind of tri-stating on the DMA or IRQ lines and
they're driven directly by LS logic.
I can mod the board to use a different IRQ and DMA channel - I just need to
tweak Imagedisk to work with it.
Still, it was kind of
neat to see the product working with a loaded (12 floppy drive) system.
That's definitely the sort of thing I want to end up with. Well, 8", 5.25"
of
various flavours and 3.5" of various flavours at least; enough to occupy more
than one controller.
cheers
Jules