Hi I'm doing serial transfers to an external system from a PC. I'm able to run without errors when I boot a straight DOS system but when using Windoz and running in a DOS window, it doesn't work well. I'm not sure yet if it is a data over run problem or that windoz is messing with my serial data. Has anyone else dealt with this problem? Is there something I can do from windoz to keep it from messing with my DOS program? Thanks Dwight
I agree that a native Win32 app would be best, but if the OP needs to run legacy code for some reason, then I suggest "Restart in MS-DOS mode" if the OS is Win95/98. Even in that "DOS-hack" OS, the legacy serial ports are virtualized, and Windows does get involved. But when you "Restart in MS-DOS mode", you really do get pure DOS with no Windows interference.
-Robert Scott Ypsilanti, Michigan (Reply through newsgroups, not by direct e-mail, as automatic reply address is fake.)
Use Control Panel ==> System ==> Device Manager and remove Windoz control of the port. I once had one DOS app running in one window out com1 talking to another DOS program in another window using com2. In using two windows I would see "dropped" characters until I turned the port off in device manager. Very easy to turn them off and back on as you wish. Hope this helps.
Dale
Thanks Dale This is what I thought but didn't know where to look. Dwight
We used WfW3.11 to multitask 8 programs that used a serial port to copy a file to punched tape. Worked like a charm after tweaking the PIF's
Wim
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