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B-1
Appendix B: AMI BIOS POST Diagnostics Error Messages
Appendix B
AMI BIOS POST Diagnostic Error
Messages
This section describes the power-on self-tests (POST) port 80 codes for
the AMI BIOS.
C h e c k
Point Description
00 Code copying to specific areas is done. Passing control
to INT 19h boot loader next.
03 N M I i s D i s a b l e d . N e x t , c h e c k i n g f o r a s o f t r e s e t o r a
power-on condition.
05 T h e B I O S s t a c k h a s b e e n b u i l t . N e x t , d i s a b l i n g c a c h e
memory.
06 Uncompressing the post code unit next.
07 Next, initializing the CPU init and the CPU data area.
08 The CMOS checksum calculation is done next.
0B N e x t , p e r f o r m i n g a n y r e q u i r e d i n i t i a l i z a t i o n b e f o r e
keyboard BAT command is issued.
0C T h e k e y b o a r d c o n t r o l l e r I / B i s f r e e . N e x t , i s s u i n g t h e
BAT command to the keyboard controller.
0E T h e k e y b o a r d c o n t r o l l e r B A T c o m m a n d r e s u l t h a s b e e n
v e r i f i e d . N e x t , p e r f o r m i n g a n y n e c e s s a r y i n i t i a l i z a t i o n
after the keyboard controller BAT command test.
0F T h e i n i t i a l i z a t i o n a f t e r t h e k e y b o a r d c o n t r o l l e r B A T
c o m m a n d t e s t i s d o n e . T h e k e y b o a r d c o m m a n d b y t e i s
written next.