DEC GTX5166M Service Quick Reference Manual page 92

Code Beeps POST Routine Description
4A Initialize all video adapters in system
4C Shadow video BIOS ROM
4E Display copyright notice
50 Display CPU type and speed
51 Initialize EISA board
52 Test keyboard
54 Set key click if enabled
56 Enable keyboard
58 2-2-3-1 Test for unexpected interrupts
5A Display prompt "Press F2 to enter SETUP"
5C Test RAM between 512 and 640k
60 Test extended memory
62 Test extended memory address lines
64 Jump to UserPatch1
66 Configure advanced cache registers
68 Enable external and CPU caches
6A Display external cache size
6C Display shadow message
6E Display non-disposable segments
70 Display error messages
72 Check for configuration errors
74 Test real-time clock
Troubleshooting
continued
4-19