Specifications

BXT7059 / BXTS7059 Technical Reference Appendix A
BIOS Status Codes
As the POST (Power On Self Test) routines are performed during boot-up, test codes are displayed on Port
80 POST code LEDs 0, 1, 2, 3, 4, 5, 6 and 7. These LED are located on the top of the SHB, just above the
board’s battery socket. The POST Code LEDs and are numbered from right (position 1 = LED0) to left
(position 8 – LED7).
The POST code checkpoints are the largest set of checkpoints during the BIOS pre-boot process. The
following chart is a key to interpreting the POST codes displayed on LEDs 0 through 7 on the BXT7059
and BXTS7059 SHBs. Refer to the board layout in the Specifications chapter for the exact location of the
POST code LEDs.
The HEX to LED chart in the POST Code LEDs section will serve as a guide to interpreting specific BIOS
status codes.
BIOS Status POST Code LEDs
As the POST (Power On Self Test) routines are performed during boot-up, test codes are displayed on Port
80 POST code LEDs 0, 1, 2, 3, 4, 5, 6 and 7. These LED are located on the top of the SHB, just above the
board’s battery socket. The POST Code LEDs and are numbered from right (position 1 = LED0) to left
(position 8 – LED7).
The POST code checkpoints are the largest set of checkpoints during the BIOS pre-boot process. The
following chart is a key to interpreting the POST codes displayed on LEDs 0 through 7 on the BXT7059
and BXTS7059 SHBs. Refer to the board layout in the Specifications chapter for the exact location of the
POST code LEDs.
Upper Nibble (UN)
Lower Nibble (LN)
Hex.
Value
LED7 LED6 LED5 LED4
Hex.
Value
LED3 LED2 LED1 LED0
0
Off
Off
Off
Off
0
Off
Off
Off
Off
1
Off
Off
Off
On
1
Off
Off
Off
On
2
Off
Off
On
Off
2
Off
Off
On
Off
3
Off
Off
On
On
3
Off
Off
On
On
4
Off
On
Off
Off
4
Off
On
Off
Off
5
Off
On
Off
On
5
Off
On
Off
On
6
Off
On
On
Off
6
Off
On
On
Off
7
Off
On
On
On
7
Off
On
On
On
8
On
Off
Off
Off
8
On
Off
Off
Off
9
On
Off
Off
On
9
On
Off
Off
On
A
On
Off
On
Off
A
On
Off
On
Off
B
On
Off
On
On
B
On
Off
On
On
C
On
On
Off
Off
C
On
On
Off
Off
D
On
On
Off
On
D
On
On
Off
On
E
On
On
On
Off
E
On
On
On
Off
F
On
On
On
On
F
On
On
On
On
Lower Nibble
7 6 5 4 3 2 1 0
Upper Nibble
BXT7059 & BXTS7059 POST Code LEDs
A-3 Trenton Systems Inc.