Doc. # 1-0000132
Date Updated 07-27-2005 Date Created 07-27-2000
Document Type Knowledge Base Related OS
Related Product COMPAD-32/ COMPAD-85
How to know which port of COMpad-32/85 got interrupt?
Solution:
In fact, both ports of COMpad-32/85 share the same IRQ, but there is no extra status register to indicate which port generated interrupt. Under Dos environment, you can use ISR routine to check the status registers of both ports to see which port got interrupt. However, Window environment just like Win95 and WinNT, supporting IRQ sharing, can identify which port got interrupt automatically.