Sun Microsystems Ultra 20 User Manual page 126

TABLE C-1
Post Code
42h
43h
44h
45h
46h
47h
48h
49h
4Ah
4Bh
4Ch
4Dh
4Eh
4Fh
50h
51h
52h
53h
54h
55h
56h
57h
58h
59h
5Ah
C-6 Sun Ultra 20 Workstation User Guide • August 2006
BIOS Port 80 POST Codes (Continued)
Description
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 and 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 USB keyboard and mouse.
Reserved.
Test all memory (clear all extended memory to 0).
Clear password according to H/W jumper (optional).
Reserved.
Display number of processors (multiprocessor platform).
Reserved.
1. Display PnP logo.
2. Early ISA PnP initialization. Assign CSN to every ISA PnP device.
Reserved.
Initialize the combined Trend Anti-Virus code.
Reserved.