Teknor Industrial Computers VIPer808, Technical Reference Manual, Page: 117 / 128

Post Codes & Error Codes F-1
APPENDIX F
POST CODES & ERROR CODES
When you power on your system, the Power On Self Test (POST) diagnostic routines
check to make sure your system is running properly. A number of check points are
covered during these tests. These POST codes are described in F.01.
Fatal errors, which halt the boot process, are communicated through a series of audible
beeps. If POST can initialize the system video display, it will display the error message.
Beep error codes are described in F.03.
F.01 POST CODES
POST codes can be displayed by installing a PC diagnostic POST card. This card includes
a small display, which indicates the POST code number of specific check-points in the
POST routines as they are passed.
POST DESCRIPTION
CODE
Uncompressed INITIALIZATION code check-points
D0 NMI is Disabled. CPU ID saved.
Init code Checksum verification starting.
D1 To do DMA init, Keyboard controller BAT test, start memory refresh
and going to 4GB flat mode.
D3 To start Memory sizing.
D4 To comeback to real mode. Execute OEM patch. Set stack.
D5 E000 ROM enabled. Init code is copied to segment 0 and control to be
transfered to segment 0.
D6 Control is in segment 0. To check <CTRL><HOME> key and verify main
BIOS
checksum.
If either <CTRL><HOME> is pressed or main BIOS checksum is bad, go to
check point E0 else goto check point D7.
D7 Main BIOS runtime code is to be decompressed and control to be passed
to main BIOS in shadow RAM.