6 BIOS Setup
78
SIS-8601-LVA
POST
(hex)
Description
40h Test 8259 interrupt mask bits for channel 2.
41h Reserved
42h Reserved
43h Test 8259 functionality.
44h Reserved
45h Reserved
46h Reserved
47h Reserved
48h Reserved
49h 1. Calculate total memory by testing the last double word of each 64K page.
2. Program writes 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 USB Keyboard & Mouse
51h Reserved
52h Test all memory (clear all extended memory to 0)
53h Clear password according to H/W jumper ( Optional )
54h Reserved
55h Display number of processors (multi-processor platform)
56h Reserved
57h 1. Display PnP logo
2. Early ISA PnP initialization
-Assign CSN to every ISA PnP device.
58h Reserved
59h Initialize the combined Trend Anti-Virus code.
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