g-cheng@gumby.WISC.EDU (Chin-long cheng) (07/13/87)
After reading the posting of Philip Lindsay (thanks) on how to access
the paralle port, I was able to convert it to gain access the
serial port resource. However, there seems to be one problem:
After some program finishes using the serial device(like the aux: handler),
the MR_SERIALPORT is not automatically freed, resulting in a failure
when my program tries to gain access.
My goal is to have multiple programs co-exist under the multi-tasking
enviornment, each gaining the access to the serial port only when necessary.
So here is my question: Is there any way to force the serial device to
release the access on MR_SERIALPORT when it is not serving anybody?
Thanks in advance,
clc
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# UUCP: ...!{ihnp4,hplabs,seismo,topaz,etc.}!uwvax!gumby!g-chengandy@cbmvax.UUCP (Andy Finkel) (07/17/87)
In article <944@gumby.WISC.EDU> g-cheng@gumby.WISC.EDU (Chin-long cheng) writes: > > After reading the posting of Philip Lindsay (thanks) on how to access >the paralle port, I was able to convert it to gain access the >serial port resource. However, there seems to be one problem: >After some program finishes using the serial device(like the aux: handler), >the MR_SERIALPORT is not automatically freed, resulting in a failure >when my program tries to gain access. When the serial.device is close it does a FreeMiscResource on both the bits and the port. Something else might be in operation here. Perhaps it isn't getting closed ? You can check this by testing if you can Expunge it (use the FlushLibs option on the hidden menu you get by using the Loadwb -debug command, or some other means. If it doesn't go away, something still has it open) andy -- andy finkel {ihnp4|seismo|allegra}!cbmvax!andy Commodore-Amiga, Inc. "The goal of Computer Science is to build something that will last at least until we've finished building it." Any expressed opinions are mine; but feel free to share. I disclaim all responsibilities, all shapes, all sizes, all colors.