Toshiba Satellite A300 Maintenance Manual - Page 92

2 Troubleshooting Procedures Procedure 2 Debugging Port Check Check the MiniPCI Debug board. The tool for debug port test is shown below. Figure 2-1 A set of tool for debug port test The test procedures are follows: 1. Replace Mini PCI debug port with Wireless LAN card, check LED in the Mini PCI debug board The following is a list of the Test Point codes written to port 80h at the start of each routine, the beep codes issued for terminal errors, and a description of the POST routine. Unless otherwise noted, these codes are valid for Phoenix BIOS 4.0 Release 6.0. NOTE: The following routines are sorted by their test point numbers were assigned in the BIOS code. Their actual order as executed during POST can Be quite different. Code Beeps POST Routine Description 02h Verify Real Mode 03h Disable Non-Maskable Interrupt (NMI) 04h Get CPU type 06h Initialize system hardware 08h Initialize chipset with initial POST values 09h Set IN POST flag 0Ah Initialize CPU registers 0Bh Enable CPU cache 0Ch Initialize caches to initial POST values 0Eh Initialize I/O component 0Fh Initialize the local bus IDE 10h Initialize Power Management 11h Load alternate registers with initial POST values 12h Restore CPU control word during warm boot 13h Initialize PCI Bus Mastering devices Satellite A300 Maintenance Manual (960-Q08) 16