User Guide

Hardware Installation
2-14
2.8 Customizing your Hardware Setup
You may customize your hardware setup according to your desired system
performance. However, doing so requires resetting of several jumpers. The
onboard jumpers are normally set to its default setting. See the figure in
section 2.2 for the location of the jumpers on the system board.
The following sections tell how to configure the system board to meet the
desired performance:
2.8.1 Selecting the IR Module Type
The connector marked CN13 lets you
select the Infrared (IR) module type that
you wish to install. The IR module
enables the system to support the remote
file transfer function.
2.8.2 Selecting the ECP DMA Channel
The ECP DMA channel selections depend
on the onboard I/O controller. The board
may come either with SMC 665 or SMC
669 I/O controller. If you have SMC 665
controller, then you may set a DMA
channel for the ECP function. The
selections are channels 3 and 1. The
default is DMA channel 3. To select
DMA channel 1, reset jumpers JP4 and
JP5 to 2-3.
If you have SMC 669, leave both jumpers open.
CN13
FOR SMC 665 I/O CONTROLLER
JP4 JP5
115.2 Kbit (5V)
4 Mbit (3.3V)
DMA channel 3
(default)
DMA channel 1