EPOX EP-4PEA, User Manual, Page: 98 / 100

Appendix
E-4
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.
4A-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
51h Reserved
52h Test all memory (clear all extended memory to 0)
53-54h 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.
5Ah Reserved
5Bh (Optional Feature) Show message for entering AWDFLASH.
EXE from FDD (optional)
5Ch Reserved
5Dh 1. Initialize Init_Onboard_Super_IO switch.
2. Initialize Init_Onbaord_AUDIO switch.
5E-5Fh Reserved
60h Okay to enter Setup utility; i.e. not until this POST stage can
users enter the CMOS setup utility.
61-64h Reserved
65h Initialize PS/2 Mouse