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54
vectors.
64 Reserved
65 PS2 Mouse special Special treatment to PS2 Mouse port
66 Reserved
67 ACPI init ACPI sub-system initializing
68 Reserved
69 Setup Cache
Controller
Initialize cache controller.
6A Reserved
6B Setup Entering Enter setup check and auto-
configuration check up
6C Reserved
6D Initialize Floppy
Drive & Controller
Initialize floppy disk drive controller
and any drives.
6E Reserved
6F FDD install Install FDD and setup BIOS data area
parameters
70 Reserved
71 Reserved
72 Reserved
73 Initialize Hard
Drive & Controller
Initialize hard drive controller and any
drives.
74 Reserved
75 Install HDD IDE device detection and install
76 Reserved
77 Detect & Initialize
Serial/Parallel
Ports
Initialize any serial and parallel
ports (also game port).
78 Reserved
79 Reserved
7A Detect & Initialize
Math Coprocessor
Initialize math coprocessor.
7B Reserved
7C HDD Check for Write
protection
HDD check out
7D Reserved
7E Reserved
7F POST error check Check POST error and display them
and ask for user intervention
80 Reserved
81 Reserved
82 Security Check Ask password security (optional).
83 Write CMOS Write all CMOS values back to RAM and
clear screen.
84 Pre-boot Enable Enable parity checker
Enable NMI, Enable cache before boot.
85 Initialize Initialize any option ROMs present
Option ROMs from C8000h to EFFFFh.
NOTE: When FSCAN option is enabled,
ROMs initialize from C8000h to F7FFFh.
86 Reserved
87 Reserved
88 Reserved
89 Reserved
8A Reserved
8B Reserved
8C Reserved
8D Reserved
8E Reserved
8F Reserved
90 Reserved
91 Reserved
92 Reserved
93 Boot Medium
detection
Read and store boot partition head and
cylinders values in RAM