TECHNICAL INFORMATION 4-5
0C
0D
0E
0F
10
11
12-13
14
15
16
17
19
1A-1D
1E
1F-29
30
31
POST(hex)
DESCRIPTION
Initialization of the BIOS Data Area. (40:ON - 40:FF)
1.Program some of the Chipset's value according to Setup. (Early Setup Value
Program)
2.Measure CPU speed for display & decide the system clock speed.
3.Video initialization including Monochromc, CGA, EGA/VGA. If no display
device found, the speaker will beep.
1.Test video RAM. (If Monochromc display device found)
2.Show messages including.
-Award Logo, Copyright string, BIOS Data code & Part No.
-OEM specific sign on messages.
-Energy Star Logo. (Green BIOS ONLY)
-CPU brand, type & speed.
-Test system BIOS checksum. (Non-Compress Version only)
DMA channel 0 test.
DMA channel 1 test.
DMA page registers test.
Reserved.
Test 8254 Timer 0 Counter 2.
Test 8259 interrupt mask bits for channel 1.
Test 8259 interrupt mask bits for channel 2.
Reserved.
Test 8259 functionality.
Reserved.
If EISA NVM checksum is good, exccute EISA initialization. (EISA BIOS only)
Reserved.
Detect Base Memory & Extended Memory Size.
1.Test Base Memory from 256K to 640K.
2.Test Extended Memory from 1M to the top of memory.
