Appendix
Dj
Error
Messages
and
Problems
In
Case
Of Difficulty
Your TRSDOS operating system was designed and tested to provide
you with trouble-free operation.
If
you do experience problems, there
is a good chance that something other than the TRSDOS system is at
fault. This section discusses some of the most common user
problems, and suggests general cures for these problems.
Problem 1
...
The system seems to access the wrong disk drives, or
cannot read the diskettes.
If
you have trouble reading Model I and
III
TRSDOS diskettes,
refer to the REPAIR and CONV Utilities. Those sections explain
how to make these types of disks readable.
If your system seems to access the wrong disk, reset your
computer. You may have selected some combination of options
that are preventing the system from functioning properly.
Remember that when you specify a drive number, you are
specifying a logical drive number which, based on your system's
configuration, may point
at
drives
in
another order. If you have
SYSGENed these settings, you will have to hold
(CLEAR)
down
while you reset your computer.
Problem 2
...
RS-232C communications do not work, or function
incorrectly.
If you experience RS-232C problems, the first thing you should
do is to make sure both "ends" are operating with the same
RS-232C parameters (baud rate, word length, stop bits, and
parity). If these parameters are not the same at each end, the
data sent and received appears scrambled.
Some hardware, such as serial printers, require "handshaking"
when running above a certain baud rate.
It
may be necessary to
hook the hardware's handshake line (such as the BUSY line) to
an appropriate RS-232C lead, such as CTS.
Problem 3
...
Random system crashes, recurring disk I/O errors,
system lock-up, and other random glitches keep happening.
If
you encounter these types of problems, the first thing to check
is the cable connections between the
TRS-80 and the
peripherals.
If you experience constant difficulty
in
disk read/write operations,
it is possible that the disk drive heads need cleaning. There are
kits available from Radio Shack to clean disk heads, or you may
wish to have the disk drive serviced at a repair facility. If you
need to frequently clean the disk heads, you might be using
some defective disk media. Check the diskettes for any obvious
signs of flaking or excess wear, and dispose of any that appear
A-51
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