Acer Power SP Información técnica descargar pdf (Pagina 55)

Chapter 4 49

29h

1. Program CPU internal MTRR (P6 & PII) for 0-640K

memory address.

2. Initialize the APIC for Pentium class CPU

3. Program early chipset according to CMOS setup.

Example: onboard IDE controller.

4. Measure CPU speed.

2Ah Reserved

2Bh Invoke Video BIOS

2Ch Reserved

2Dh

1. Initialize double-byte language font (Optional)

2. Put information on screen display, including Award

title, CPU type, CPU speed, full screen logo.

2Eh Reserved

2Fh Rederved

30h Reserved

31h Reserved

32h Reserved

33h Reset keyboard if Early_Reset_KB is defined e.g. Winbond 977

series Super I/O chips. See also POST 63h

34h Reserved

35h Test DMA Channel 0

36h Reserved

37h Test DMA Channel 1

38h Reserved

39h Test DMA page registers

3Ah Reserved

3Bh Reserved

3Ch Test 8254

3Dh Reserved

3Eh Test 8259 interrupt mask bits for channel 1

3Fh Reserved

40h Test 8259 interrupt mask bits for channel 2

41h Reserved

42h Reserved

43h Test 8259 functionality

44h Reserved

45h Reserved

46h Reserved

47h Initialize EISA slot

48h Reserved

49h

1. Calculate total memory by testing the last double word

of each 64K page.

2. Program write allocation for AMD K5 CPU.

Checkpoint Description

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 71 72

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