NEC MH4500 - Manual (Page 122)

5-20 Solving Problems
POST Tests
Code Beeps POST Routine Description
96 Clear hugh ES segment register
98 1-2 Search for option ROMs. One long, two short beeps on checksum failure
9A Shadow option ROMs
9C Set up Power Management
9E Enable hardware interrupts
A0 Set time of day
A2 Check key lock
A4 Initialize typematic rate
A8 Erase F2 prompt
AA Scan for F2 keystroke
AC Enter SETUP
AE Clear in-POST flag
B0 Check for errors
B2 POST done - prepare to boot operating system
B4 1 One short beep before boot
B5 Display MultiBoot menu
B6 Check password; password is checked before option ROM scan
B7 ACPI initialization
B8 Clear global descriptor table
BC Clear parity checkers
BE Clear screen (optional)
BF Check virus and backup reminders
C0 Try to boot with INT 19
C8 Forced shutdown
C9 Flash Recovery
D0 Interrupt handler error
D2 Unknown interrupt error
D4 Pending interrupt error
D6 Initialize option ROM error
D8 Shutdown error
DA Extended Block Move
DC Shutdown 10 error