![background image](http://html.mh-extra.com/html/acer/acerpower-sd/acerpower-sd_service-manual_5782058.webp)
Chapter 4
53
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
Содержание AcerPower Sd
Страница 6: ...VI ...
Страница 51: ...46 Chapter 2 ...
Страница 53: ...48 Chapter 3 ...
Страница 71: ...66 Chapter 4 ...
Страница 79: ...74 Chapter 6 ...
Страница 81: ...76 Appendix A ...
Страница 87: ...82 Appendix C ...
Страница 91: ...86 Index ...