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AST RESEARCH TECHNICAL BULLETIN TB-0172 4-24-86
AST-5251/11 TROUBLESHOOTING
The intent of this Technical Bulletin is to help the user of AST-
5251/11 troubleshoot situations that may arise at installation
time. It is assumed that the user has read all manuals supplied
by AST for the installation procedure, and is familiar with all
terminology contained within.
The following are the most common symptoms that may occur when
initially installing the AST-5251/11:
While using AST-5251/11, if you encounter:
KERNEL error code 1 or 3:
-Try reseating the board.
-Error code 3 with possible I/O address conflict.
Select another I/O address on AST board.
KERNEL error code 2 or 4:
-Indicates an interrupt or DMA conflict. Reconfigure
our board to use a different interrupt or DMA channel.
While using AST-5251/11, if you encounter:
Successful execution of KERNEL and APS, but no sign-on screen
is displayed:
*If SA indicator is "not" in reverse video:
-Make sure only the last terminal on the line is
terminated.
-Be sure that the model terminal which the AST board is
emulating, is one that AST supports, and the software
is configured to reflect that on both the PC side and
the SYS. 3X side.
-Check the system console for any messages that have
been generated and need to be responded to.
-Check cabling, both the twinax stub cable which AST
provides and long twinax cable that is connected to
SYS. 3X.
*If SA indicator "is" in reverse video:
-Verify that the address number, in the lower right-
hand side of the screen, is the same station address
number that is in the host configuration.
*If SA indicator is blinking:
-Verify that you are not having a station address
conflict with another terminal.
GENERAL TROUBLESHOOTING
If you are experiencing problems, try the following:
1. Take all extra cards out of PC (e.g. other emulation
cards, network cards, etc.) and set the AST board to
factory configuration. If emulation comes up okay, then
add the other boards in one at a time.
2. See if the same symptom occurs in another PC.
3. Move the PC to a different location to determine if the
problem follows the location or the PC.
4. Move the PC so that it is the first terminal on the line
and terminate it, then see if the problem still exists.
5. If you change any of the jumpers on the board, be sure
to modify the software to reflect those alterations.
6. If you are getting an error on KERNEL, remove the twinax
stub cable from the back of the board, and then run
KERNEL.
If you are still encountering problems and need to contact
Technical Support for assistance, please have the following
information available:
Type of PC (PC, XT, AT, or compatible)
Version of DOS
Total memory in PC
Other cards that are in the PC
Version of AST emulation software
Host computer
Release of host software
Station address of display
Station address of printer
Specific configuration of line (other terminals and
their station address)