Teknor Industrial Computers PCI-934, Техническое справочное руководство

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BIOS Setup Error Codes
E-5
E.4 POST CODES
NOTE
ISA POST codes are output to port address 80h.
POST
(hex)
Name Description
01 BOOT BLOCK Boot Block in EMERGENCY : Clear Base Memory Area.
03 Initialize Chips 1. Clear CMOS shutdown byte.
2. Initialize EISA extended registers. (Not for us since we don’t
have EISA bus.)
04 Test Memory Refresh Toggle RAM must be periodically refreshed in order to keep the memory
from decaying.
05 Blank Video, Initialize Keyboard 1. Clear CMOS reset status
byte.
2. Early Keyboard
initialization.
Boot Block in EMERGENCY:
Initialize Keyboard Controller.
06 EPROM Checksum 1. Test F000h segment shadow readable and writeable for
POST access correct.
If not, show POST FE and beep continuously…
2. Autodetect Flash EPROM.
07 Test CMOS Interface and
Battery Status 1. Install the TEKNOR segment.
2. Verifies CMOS is working correctly (walking bit test).
3. Restore CMOS from Flash if option is enabled.
4. Check for OVERRIDE KEY (INSERT key).
08 Program Chipset default Program Chipset default (show POST BEh).
09 Early Cache Initialization 1. Check for Intel’s and/or Cyrix CPU.
2. Early Cache Initialization when cache is separate from
chipset.
3. Turn off Gate A20.
0A Setup Interrupt Vector Table 1. Initialize first 120 interrupt vectors with
SPURIOUS_INT_HDLR and initialize int. 00h-1Fh according
to INT_TBL.
2. Early Power Management Initialization.