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2.4 System Board Troubleshooting 2 Troubleshooting Procedures
Table 2-4 Debugging port boot mode status (3/7)
Debug Port Description
0129h Initialize the POST Memory Manager
012Ah Zero clear the first 512K of RAM
012Bh
012Ch Test 512K base address lines
012Eh Test the first 4MB of RAM.
012Fh Initialize external cache before shadowing.
0132h Compute CPU speed.
0133h Initialize the Phoenix Dispatch Manager
0134h Test the CMOS RAM and RTC
0136h Vector to proper shutdown routine.
0138h Shadow the system BIOS.
013Ah External cache is autosized and its configuration saved in memory.
013Bh
013Ch If CMOS is valid, load chipset registers with values from CMOS, otherwise load
defaults.
013Dh Load alternate registers with CMOS values.
013Fh
0141h
0142h Initialize interrupt vectors 0 thru 77h to the BIOS general interrupt handler.
0145h Initialize all motherboard devices.
0146h Verify the ROM copyright notice
0148h Verify that the equipment specified in the CMOS matches the hardware currently
installed.
0149h Initialize all PCI devices.
014Ah Initialize video chip in system
014Bh
014Ch Shadow video BIOS ROM.
014Eh Display copyright notice.
014Fh Initialize MultiBoot. Allocate memory for old and new MultiBoot history tables.
0150h Display CPU type and speed.
0151h
Satellite M30-35 Maintenance Manual (960-455) 2-23