ROCKY-3705EV-R2 Socket 370 Celeron
TM
, Pentium III
®
& Tualatin Processor with Ethernet , VGA , Audio Board
65
Example assembly program:
TIMER_PORT = 443H
TIMER_START = 443H
TIMER_STOP = 843H
;;INITIAL TIMER COUNTER
MOV DX, TIMER_PORT
MOV AL, 8
;;8 seconds
OUT DX, AL
MOV DX, TIMER_START
IN AL, DX
.
;;start counter
W_LOOP:
MOV DX, TIMER_STOP
IN AL, DX
MOV DX, TIMER_START
IN AL, DX
;;restart counter
;;ADD YOUR APPLICATION HERE
CMP EXIT_AP, 0
JNE W_LOOP
MOV DX, TIMER_STOP
IN AL, DX
;;EXIT AP
ROCKY-3705EV-R2 Socket 370 Celeron
TM
, Pentium III
®
& Tualatin Processor with Ethernet , VGA , Audio Board
66
Appendix B. POST Messages
POST Messages
During the Power On Self Test (POST), if the BIOS detects an error requiring you
to do something to fix, it will either sound a beep code or display a message.
If a message is displayed, it will be accompanied by:
PRESS F1 TO CONTINUE, CTRL-ALT-ESC OR DEL TO ENTER SETUP
POST Beep
Currently there are two kinds of beep codes in BIOS. This code indicates that a
video error has occurred and the BIOS cannot initialize the video screen to
display any additional information. This beep code consists of a single long beep
followed by three short beeps. The other code indicates that your DRAM error
has occurred. This beep code consists of a single long beep repeatedly.
Error Messages
One or more of the following messages may be displayed if the BIOS detects an
error during the POST. This list includes messages for both the ISA and the
EISA BIOS.
CMOS BATTERY HAS FAILED
CMOS battery is no longer functional. It should be replaced.
CMOS CHECKSUM ERROR
