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Appendix B2
0D 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 Monochrome, CGA, EGA/VGA.
If no display device found, the speaker will beep.
0E 1. Test video RAM. (If Monochrome 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)
0F DMA channel 0 test.
10 DMA channel 1 test.
11 DMA page registers test.
12-13 Reserved.
14 Test 8254 Timer 0 Counter 2.
15 Test 8259 interrupt mask bits for channel 1.
16 Test 8259 interrupt mask bits for channel 2.
17 Reserved.
19 Test 8259 functionality.
1A-1D Reserved.
1E If EISA NVM checksum is good, execute EISA initialization.
(EISA BIOS only)
1F-29 Reserved.
30 Detect Base Memory & Extended Memory Size.
31 1. Test Base Memory from 256K to 640K.
2. Test Extended Memory from 1M to the top of memory.
32 1.Display the Award Plug & Play BIOS Extension message. (PnP
BIOS only)
2.Program all onboard super I/O chips (if any) including COM
ports, LPT ports, FDD port ... according to setup value.
33-3B Reserved.
3C Set flag to allow users to enter CMOS Setup Utility.
3D 1.Initialize Keyboard.
2.Install PS2 mouse.
3E Try to turn on Level 2 cache.
Note : Some chipset may need to turn on the L2 cache in this
stage. But usually, the cache is turn on later in POST 61h.