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- OSMKCM04 - COMMON PROBLEMS AND SOLUTUIONS
- 10/13/94
-
- ================================================================
- COMMON PROBLEMS AND SOLUTUIONS
- ================================================================
-
- Please Read Entire Document for Full Explanation of Procedures
- ----------------------------------------------------------------
-
- NOTE: Make sure you have the latest COM.SYS and VCOM.SYS
- installed.
-
-
- SYMPTOMS:
-
- 1. SYS1201 driver not installed
-
- 2. "COM port not available" or "IRQ not available"
-
- 3. Can not open a DOS or Windows application.
-
- 4. SYS3175 and SYS3176
-
- 5. SYS0049
-
- 6. SYS0099 or SYS1798
-
- 7. Application does not recognize COM port
-
- 8. Mode command causes session to hang
-
-
-
- RESOLUTIONS:
-
- 1. Path statements & physical devices
-
- 2. IRQ conflict or incorrect hardware configuration
-
- 3. Check path commands
-
- 4. DOS settings and APARS.
-
- 5. An attached device problem
-
- 6. The port is being used by another application
-
- 7. Application settings, configuration
-
- 8. IRQ conflict or APAR
-
-
-
- RESOLUTION:
-
- 1. SYS1201 driver not installed error can be caused by a number
- of problems.
-
- - The path statement for the driver in the CONFIG.SYS file
- may be incorrect.
-
- A. When COM.SYS does not install:
-
- - Physical ports may not exist.
-
- - Physical ports are not configured correctly
- in bios (reference configuration for MCA) .
-
- - Physical ports may be defective or incorrectly
- setup.
-
- - The driver specified is defective or non existant.
-
-
-
- 2. IRQ conflict or incorrect hardware configuration
-
- IRQ conflicts can cause many problems. They can result in
- problems unrelated to the immediate point of conflict. You
- can eliminate IRQ conflicts by creating a table with rows
- that rows represent each slot of the machine and columns that
- columns represent the "Card Type" "IRQ Level" "I/O Address"
- "DMA Address" "Manufacturer Info". Change this information
- as the configuration changes to save time and ensures
- configuration integrity. Use the documentation that came
- with the adapter for the switch settings. Each adapter must
- be assigned to a unique IRQ level and I/O port address. DMA
- address' should also be unique.
-
-
-
- 3. Can not open a DOS or Windows application.
-
- - Make sure that the latest communications drivers are
- installed.
-
- - Make sure the application is installed correctly.
-
- A. Path commands may be incorrect.
-
- B. Applications installed under real DOS may need to be
- reinstalled under OS/2.
-
-
-
- 4. SYS3175 and SYS3176
-
- - If the application is an OS/2 application, contact the
- vendor of the application.
-
- - Sometimes adjusting the DOS_HIGH and DOS_UMB
- adjustments remedy this problem.
-
- - Running the application in full screen helps.
-
- - Slowing down the processor and disabling external
- cache on faster machines also helps.
-
- - XR6200 includes fixes for computers with Pentium, DX,
- processors with this problem. Check for current APARS
- listed for specific applications and the error
- message.
-
-
-
- 5. SYS0049
-
- Usually indicates a non-functioning attached device. Use the
- MODE command to check if the port is installed correctly. If
- the mode command functions correctly, use the use the
- "spurious interrupt" that is passed on the command line of
- the COM.SYS device driver in the CONFIG.SYS. Make sure the
- hardware is configured correctly and functioning optimally.
-
-
-
- 6. SYS0099 or SYS1798
-
- Usually means the port requested is being accessed by another
- application. Some applications automatically take all
- available system resources. If the problem occurs, view the
- task list and note applications that are running. Verify
- that these applications are not, or should not, use the port.
- OS/2 provides a DOS property in the DOS settings to hide COM
- ports from applications. Set the COM_SELECT property to none
- or the specific port being used; for example, COM_SELECT =
- COM1.
-
-
-
- 7. Application does not recognize COM port
-
- - Check for an IRQ conflict.
-
- - Make sure the application port and line settings are
- configured correctly.
-
- - If using COM3 and COM4 or COM1 and COM2 with
- non- default configuration settings on an ISA machine,
- check the following:
-
- A. Verify the command line parameters on the
- COM.SYS device driver in the CONFIG.SYS file are
- correct.
-
- - For MS Windows applications make sure the Windows
- port setup is correct.
-
-
-
- 8. Mode command causes session to hang
-
- - Can be caused by IRQ conflicts (see sections on IRQ
- conflict and resolution).
-
- - Check the APAR data base. There may be situations
- where defective hardware had in similar results.
-
-
- ----------------------------------------------------------------
- IBM disclaims all warranties, whether express or implied,
- including without limitation, warranties of fitness and
- merchantability with respect to the information in this document.
- By furnishing this document, IBM grants no licenses to any
- related patents or copyrights.
-