Acer Power ST Aspire T300 Service Guide - Page 59

Checkpoint 29h 2Ah 2Bh 2Ch 2Dh 2Eh 2Fh 30h 31h 32h 33h 34h 35h 36h 37h 38h 39h 3Ah 3Bh 3Ch 3Dh 3Eh 3Fh 40h 41h 42h 43h 44h 45h 46h 47h 48h 49h Description 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. Reserved Invoke Video BIOS Reserved 1. Initialize double-byte language font (Optional) 2. Put information on screen display, including Award title, CPU type, CPU speed, full screen logo. Reserved Rederved Reserved Reserved Reserved Reset keyboard if Early_Reset_KB is defined e.g. Winbond 977 series Super I/O chips. See also POST 63h Reserved Test DMA Channel 0 Reserved Test DMA Channel 1 Reserved Test DMA page registers Reserved Reserved Test 8254 Reserved Test 8259 interrupt mask bits for channel 1 Reserved Test 8259 interrupt mask bits for channel 2 Reserved Reserved Test 8259 functionality Reserved Reserved Reserved Initialize EISA slot Reserved 1. Calculate total memory by testing the last double word of each 64K page. 2. Program write allocation for AMD K5 CPU. Chapter 4 53