Acer EL1210 Service Guide - Page 66

Reset keyboard if Early_Reset_KB is defined e.g. Winbond 977 series Super I/O

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Page 66 highlights

POST Code (Hex) 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 4Ah 4Bh 4Ch 4Dh 4Eh 4Fh 50h POST Routine Description 1 Initialize double-byte language font (Optional) 2 Put information on screen display, including Award title, CPU type, CPU speed, full screen logo. Reserved Reserved 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. Reserved Reserved Reserved Reserved 1 Program MTRR of M1 CPU 2 Initialize L2 cache for P6 class CPU & program CPU with proper cacheable range 3 Initialize the APIC for P6 class CPU 4 On MP platform, adjust the cacheable range to smaller one in case the cacheable ranges between each CPU are not identical Reserved Initialize the USB Keyboard & Mouse 58 Chapter 4

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58
Chapter 4
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
Reserved
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.
4Ah
Reserved
4Bh
Reserved
4Ch
Reserved
4Dh
Reserved
4Eh
1
Program MTRR of M1 CPU
2
Initialize L2 cache for P6 class CPU & program CPU with proper cacheable
range
3
Initialize the APIC for P6 class CPU
4
On MP platform, adjust the cacheable range to smaller one in case the
cacheable ranges between each CPU are not identical
4Fh
Reserved
50h
Initialize the USB Keyboard & Mouse
POST Code (Hex)
POST Routine Description