Runtime Code Uncompressed In F000 Shadow Ram - Intel D810E2CA3 Specification

Intel Desktop Board D810E2CA3 Technical Product Specification
Table 77.

Runtime Code Uncompressed in F000 Shadow RAM

Code Description of POST Operation
03 NMI is Disabled. Check soft reset/power-on.
05 BIOS stack set. Disable cache if any.
06 Uncompress POST code.
07 Initialize processor and initialize processor data area.
08 Next, calculate CMOS checksum.
0B Next, do any initialization before executing keyboard BAT.
0C Keyboard controller I/B free. Issue the BAT command to keyboard controller.
0E Any initialization after keyboard controller BAT to be done next.
0F Write keyboard command byte.
10 Issue pin 23, 24 blocking/unblocking command.
11 Check whether <INS>, <END> keys were pressed during power on.
12 Initialize CMOS if "Init CMOS in every boot" is set or if <END> key is pressed. Then disable
DMA and interrupt controllers.
13 Video display is disabled and port B is initialized. Chipset initialization about to begin.
14 8254 Timer Test is about to start.
19 Memory Refresh Test is about to start.
1A Memory Refresh line is toggling. Check 15 µs ON/OFF time.
23 Read 8042 input port and disable Megakey GreenPC feature. Make BIOS code segment
writeable.
24 Do any setup before interrupt vector initialization.
25 Interrupt vector initialization to begin. Clear password if necessary.
27 Next, do any initialization before setting video mode.
28 Set monochrome mode and color mode.
2A Start initialization of different buses, if present (system, static, output devices). (See Section 5.3
for details of different buses.)
2B Give control for any setup required before optional video ROM check.
2C Look for optional video ROM and give control.
2D Give control to do any processing after video ROM returns control.
2E If EGA/VGA not found, then execute Display Memory R/W Test.
2F EGA/VGA not found. Display Memory R/W Test about to begin.
30 Display Memory R/W Test passed. Look for the retrace checking.
31 Display Memory R/W Test or retrace checking failed. Do Alternate Display Memory R/W Test.
32 Alternate Display Memory R/W Test passed. Look for the alternate display retrace checking.
34 Video display checking complete. Next, set display mode.
37 Display mode set. Then display the power-on message.
38 Start initialization of different buses, if present (input, IPL, general devices). (See Section 5.3 for
details of different buses.)
39 Display different buses initialization error messages. (See Section 5.3 for details of different
buses.)
3A New cursor position read and saved. Ready to display the Hit <DEL> message.
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