A. Jumper Descriptions
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JUMPER DESCRIPTIONS
The "Jumper Cross Reference" table below lists the jumpers associated with each
option. A dagger (
†
) in a jumper description indicates a factory default configuration.
A description of the effects produced by installing or removing each jumper follows the
current topic.
Jumper Cross Reference
Option
Jumper #
24-Bit Address Selection (A20-23)
W4-7
Early ALE* Signal Generation
W15
Shared Memory Block Location
W8,9,15
16-Bit Data Width Selection
W17
,
W18
ISP PAL Program Enable
W3
Backplane Interrupt Signal Selection
W11,12
Frontplane Interrupt Signal Selection
W13,14
Thin Ethernet Enable
W10
WAITRQ* Enable Selection
W16
,
W19
W1 (Chassis Ground to Logic Ground)
W1 ties chassis ground to logic ground. This jumper location is not loaded.
Jumper
Function
W1
Ties chassis ground to logic ground
W2 (AT/LANTIC Power-On Configuration)
W2 controls how the AT/LANTIC loads its power-on configuration.
This jumper location is not loaded. The 'A' position is strapped to VCC, forcing the
AT/LANTIC chip to load its power-up configuration from the EEPROM.
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