ISA IRQ sharing


I am using a 4 RS-232 ISA interface module along with a PC-104 board, but i don’t have enough IRQs available for the 4 RS-232 ports. I tried to start the devc-ser8250 sharing one IRQ between two ports but didn’t work. I’d like to know if the devc-ser8250 driver supports ISA IRQ sharing or do i need to write an ISR function, if so could anyone supply me some example code or any help. Is there anyway i could share ISA IRQ on QNX 6.3.2???

Many thanks in advance
Gutemberg Franca

Answered on Foundry27