Quatech QSC(LP)-100 - Manual (Page 7)

2 Hardware Configuration
The QSC(LP)-100 is automatically configured at boot time by the
computer's BIOS or operating system. There are no required switches or jumpers
to set for installation.
This chapter lists a number of optional jumper settings that control various
hardware features. Jumpers J2-J5 are grouped together at the end of the board
opposite the HD-44 connector. Any changes from the factory default should be
made before installing the QSC(LP)-100 in the computer.
2.1 Factory Default Configuration
Figure 2 shows the jumper configuration as shipped from the factory, with
two spare jumpers applied in neutral positions. Remove one or both and apply as
shown in following sections to set optional features.
SPAD
X2
X4
X8
J2
J3
J4
J5
Figure 2 --- Factory default jumper configuration
2.2 Enable Scratchpad Register (SPAD, J2)
In the default configuration, an Interrupt Status Register (see section 4.3)
and an Options Register (see section 4.4) replace the scratchpad (base address + 7)
of each UART. If the SPAD jumper is applied as in Figure 3, the UART
scratchpad registers are enabled, and the Interrupt Status Register and the Options
Register are not available.
SPAD
X2
X4
X8
J2
J3
J4
J5
Figure 3 --- Enable scratchpad registers
QSC(LP)-100 User's Manual 7