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DOS开发编程 & 发展交流（开发室） » Question for the experts: how to write a read/write test program for multiple serial ports under DOS

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Floor1　icepnt	Posted 2003-05-07 00:00
初级用户　Posts 7　Credits 120
The system has a multi-serial-port card with eight 232 serial ports, sharing one interrupt (IRQ10). In addition, the motherboard itself has 4 serial ports, using IRQ3 (com2, com4) and IRQ4 (com1, com3) respectively. How can I initialize the serial ports and do read/write operations? When reading uses interrupts, how do I tell which serial port number it is? (in the case of a shared interrupt) How do I enable and disable interrupts?? Thanks. I’ve never done this kind of serial-port development under DOS before, and I hope to get everyone’s help here!! Waiting online!!

Floor2　如是大师	Posted 2003-05-07 00:00
元老会员　Posts 3,351　Credits 9,654　From 湖北
I’m not too familiar with this either, wait for the other moderators...

Floor3　icepnt	Posted 2003-05-07 00:00
初级用户　Posts 7　Credits 120
I’m in a hurry. If I use interrupts, how do I put my own interrupt handler into the vector table? How do I enable interrupts, and what needs to be done to make it work properly? For example, for COM1’s IRQ4 interrupt vector 0ch, what do I need to set in order to enable the interrupt? help me please！