user manual

5. JUMPER CONFIGURATIONS
The MPA-100 utilizes various jumper blocks which allow the user to customize their
hardware configuration. The following sections explain the function and setting of each of the
jumper blocks on the MPA-100.
5.1 DTE/DCE Configuration - J2, J11, & J12
The jumper packs J2, J11, and J12 control the DTE/DCE configuration of the MPA-100.
J2 determines the board setting (DTE or DCE) while the jumper packs J11 and J12 control the
routing of the signals to the DB-25 connector. All three jumper packs must be set exclusively to
either DTE or DCE for correct operation of the MPA-100.
Table 3 DTE/DCE Jumper Selections
1-2, 3-4, 5-6, 7-81-5, 2-6, 3-7, 4-8J12
1-2, 3-4, 5-6, 7-8, 9-10, 11-12,
13-14, 15-16
1-9, 2-10, 3-11, 4-12, 5-13,
6-14, 7-15, 8-16
J11
no connection1-2J2
DCE
DTE (Default)
J11 and J12 may be configured for DTE by setting all jumpers vertical on the board and for DCE
by setting all jumpers horizontal on the board.
5.2 Interrupt Sharing Configuration - J4
J4 is a three pin jumper which determines the configuration for the interrupts. By
selecting pins 1 & 2, the user has the ability to share interrupts with other Quatech adapter cards.
The MPA-100 will drive the interrupt onto the bus only when an interrupt occurs. Otherwise, the
output is high impedance. If pins 2 & 3 of J4 are selected, then interrupts abide by the IBM
specification and cannot be shared. Table 4 summarizes the jumper block selections for J4.
Table 4 Jumper Block J4 Selections
2-3No Interrupt sharing
1-2
Interrupt Sharing (Default)
PinsInterrupt Function
MPA-100 User's Manual 5-1