RS232 interfacing program

Hello All,

I am new to this list and am not sure if this is the right place to ask this question. Nonetheless, I am sure that you computer gurus can provide me some pointers.

What I am trying to do is this:

I have a camera shutter driver that is connected to COM1 port and a camera image processing unit that is connected to the parallel (printer) port. I am using a null modem cable as a physical interconnect between the COM1 and the camera shutter driver which supports only RS232 mode of communication. I am interested to control the driver and the image processing unit by writing a program in a PC that is used as a controller. The PC has Windows 98 installed in it, and I am using a Turbo C++ 7.0 compiler. I am using the bioscom command to communicate with the devices over the RS232 Link.

While compiling the program, I am getting an error in dos.h which states  that the following are wrong:

void _Cdecl setvect (int interruptno, void interrupt (*isr()); -> This says function definition out of place

void interrupt (*_Cdecl getvect(int interruptno)) (); -> the same error here as well.

I am not sure what exactly the problem is, though I suspect a compiler mismatch. Can any one of you please let me know what I could do to rectify this error? Or perhaps provide me some help (or an alternative link) so that I could
get the program working.

Thanks a lot in advance!

Dip
dguhaAsked:
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alistairmcnicollCommented:
No idea about the ins and outs, but a friend of mine maintains an opensource RS232 driver at sourceforge.net - you might be able to either skim through his code for clues or even use his driver, which has been tested pretty rigourously:

http://sourceforge.net/projects/dzcomm/

Al

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