20 Jul
2006
20 Jul
'06
9:16 a.m.
On 7/20/2006 at 4:38 PM Jules Richardson wrote:
... and I'm not sure if I need to change the IRQ
and DMA lines too....
On a well-behaved PC XT/AT FDC, bit 3 of the DCR is supposed to tristate
the IRQ and DRQ lines, so two or more FDCs can share the same IRQ and DMA
selections. Not all controllers do this, however, so it's best to check.
Cheers,
Chuck