A. Jumper Configurations
111
Jumper Descriptions
The following topics list the jumpers in numerical order and provide a detailed
description of each jumper. A dagger (
†
) indicates the default jumper configuration.
W1-7
Reserved for Ziatech use. Do not install these jumpers.
W8
Numeric Coprocessor - indicates the presence of a numeric coprocessor.
W8
Numeric Coprocessor
IN
Installed
†
OUT
Removed
W9-11
Non-Maskable Interrupts - arm the AC power-fail, STD bus, and watchdog timer
interrupts for non-maskable interrupt generation. Jumper installation connects the non-
maskable interrupt source to the CPU non-maskable interrupt input. System Register 1
provides status to determine which source generated the interrupt when more than one
source is enabled.
W9
AC Power Fail NMI
IN
Enabled
†
OUT
Disabled
W10
STD bus NMIRQ*
†
IN
Enabled
OUT
Disabled
W11
Watchdog timer
IN
Enabled
†
OUT
Disabled
†
Factory default configuration for DOS systems.