Specifications

Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER # DESCRIPTION
W8(A,B) Install W8A to bring timer 1 output to the
interrupt request 4 (IR4) on the interrupt
controller. Install W8B to bring serial port 1
(COM1) interrupt request to IR4. Factory
default installs W8B.
W8A W8B Function
IN OUT Timer 1 output drives IR4
OUT IN † Serial port 1 (COM1) drives IR4
W9(A,B) Select jumper W9A to bring the power-fail
non-maskable interrupt request (PNMI*) to
interrupt request 5 (IR5) on the interrupt
controller, provided jumpers W1 and W2 are
also installed. Select jumper W9B to bring
the frontplane interrupt request 5 (FP5*) to
IR5, assuming again that jumper W2 is in-
stalled. (Refer to the description of jumper
W2.) Factory default installs W9B.
W9A W9B Function
IN OUT PNMI* power-fail NMI drives IR5
OUT IN † FP5* frontplane interrupt drives IR5
A-7