Jumper Pin AT Single AT Master AT Slave XT
Master/Slave 1-2 X X O (3)
Slave present 3-4 O X O (3)
Active LED 5-6 X X O (2) X
Host; slave present 5-7 O O X (2) O
XT mode 7-8 O O O X
40 MB cap. (XT only) 1-2 O O O X
30 MB cap. (XT only) 3-4 O o o x
20 MB cap. (XT only) 1-2 & 3-4 o o o x
Factory test 7-9 Factory Use Only
Bus reset hi (1) 10-12 O O O O/X
Bus reset lo (1) 11-12 X X X O/X