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5 Troubleshooting
144
ATA / ATAPI / SATA
0x5Ah G R G R Resetting PATA / SATA bus and all
devices
0x5Bh G R G A Reserved for ATA
SMBUS
0x5Ch G A OFF R Resetting SMBUS
0x5Dh G A OFF A Reserved for SMBUS
Local Console
0x70h OFF R R R Resetting the video controller
0x71h OFF R R A Disabling the video controller
0x72h OFF R A R Enabling the video controller
Remote Console
0x78h G R R R Resetting the console controller
0x79h G R R A Disabling the console controller
0x7Ah G R A R Enabling the console controller
Keyboard (PS/2 or USB)
0x90h R OFF OFF R Resetting the keyboard
0x91h R OFF OFF A Disabling the keyboard
0x92h R OFF G R Detecting the presence of the
keyboard
0x93h R OFF G A Enabling the keyboard
0x94h R G OFF R Clearing keyboard input buffer
0x95h R G OFF A Instructing keyboard controller to
run Self Test (PS/2 only)
Mouse (PS/2 or USB)
0x98h A OFF OFF R Resetting the mouse
0x99h A OFF OFF A Detecting the mouse
0x9Ah A OFF G R Detecting the presence of mouse
Checkpoint
code
Diagnostic LED Decoder
Description
G=Green, R=Red, A=Amber
MSB LSB