DTA: Jumpers/Switches/Controls
Jumpers/Switches/Controls
Jumpers
X = jumpered
O = unjumpered
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
(1) Bus reset active level. System dependent. A jumper must be installed on either Bus Reset Hi or Bus Reset Low; the drive will not function if neither set of pins is jumpered.
(2) HSP /Assert "/DASP" signal: pin 39 on the 40-pin AT/XT Interface connector. The Host Slave Present jumper and the Active LED jumper are mutually exclusive.
(3) XT only. These jumpers are used to set the drive type information to be returned by the drive via the Drive Configuration register (I/O port 2) or the XT interface.
Commonly Used Jumper Settings:
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