NEC MH4500 User 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