Hello,
having a standard isa serial board (with two National 16550 or
equivalent), is possible, under Linux make both prot sharing a single
interrupt, eventually modifying the serial board.
As far I can remember INTR on ISA BUS is a standard TTL signal active
HIGH, so I could simply add two diodes or an AND logic gate to make the
hardware happy (I'm not to sure about this, but at a quick read of
UART's datasheet, seems ok to me).
Then having a PCI machine, the interrupt logic on PCI bridge have to be
set up to level triggered instead of edge triggered.
Anyone have experience on these things, or have some sample configuration
for linux?
Any help is appreciated
73 de Mike iw1cfl
