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5
EPC-26A/27 Hardware Reference
Symptoms
Serial port(s) do not work.
Common Error Messages
5
This section contains a summary of error and warning messages alphabetized by
message text. These are messages generated by the BIOS and MS-DOS that may be
related to your hardware configuration.
BAD OR MISSING COMMAND INTERPRETER
Problem:
The DOS operating system cannot find the Command line interpreter.
Solution(s): Either COMMAND.COM is not present at the specified (or default)
directory level of the boot disk or the "SHELL=" statement in your
CONFIG.SYS lists the file incorrectly (wrong directory or
misspelled).
SYSTEM CMOS CHECKSUM BAD -- RUN SETUP
Problem:
One of the entries in the CMOS RAM is incorrect.
Solution(s): Run the BIOS setup program to determine what is wrong, and correct
it. If the error occurs repeatedly, the EPC's battery has failed.
Page 32
Possible cause(s)
Solution
Port is disabled in the
Enter the Setup screen. Use cursor
Setup screen.
arrows to move to the appropriate
field and toggle the entry to enable
the port.
Interrupt conflicts.
Another module may be using the
same interrupts as COM1 and/or
COM2. Verify that no other card in
sytem is using IRQ3 or IRQ4.
Port hardware failure.
Replace the EPC.
DOS
CMOS
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