IBM 6580 User Manual

BAT After Display Initialization
As the BAT is completed in system bus
buffer 1, it expands to system bus
buffer 2, and the display adapter is
tested. When the BAT determines the
display adapter is operational, the
number of the tes t be'ing performed
appears at the bottom of the display.
The IBM logo is displayed when the BAT
completes correctly. Figure 9-4 is a
flowchart of the BAT after display
initialization.
FROM
PRE·DISPLA
Y
PHASE OF
BAT
Figure
9-4. BAT After Display
Initialization
If the BAT could not complete because
of an error, further diagnosis is pos-
sible through the use of the keyboard.
•
•
•
Pressing the ENTER key causes the
BAT to retry the test which
failed.
Pressing the MOVE key or (if the
keyboard is not operational) the
Memory Record Button causes the
BAT to skip the failing test and
continue with the next text.
Because of the error, control is
passed to the Resident
Non-Automatic (RNA) Diagnostics
controller when the BAT completes.
Pressing .( the END key will cause
the system control to go from the
BAT to the Resident Non-Automatic
(RNA) Diagnostic controller.
Any message, test, or error numbers
displayed will be removed from the
display when any of the above are
pressed.
SA T Progress/Error Codes
Figure 9-5 shows the BAT display for-
mat when an error occurs during BAT.
The table (Figure 9-6) lists the tests
in the order in which they occur. The
LED pattern and the display failure
codes indicate which test failed.
The LEDs are read in binary. That is,
o is off ,and 1 is on. Where an LED
(E-H) pattern is shown (for example
0101 for the display adapter timing
test), it is read as follows: the "E"
LED is off, "F" is on, "G" is off and
"H" is on.
Chapter 9. Diagnostics 9-5

IBM 6580 Specifications

General

Brand	IBM
Model	6580
Category	Desktop
Language	English