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4 JUMPER BLOCK CONFIGURATIONS
The MPA-200 utilizes seven user-selectable jumper blocks , that allow the user
more flexibility when configuring the board. The following section explains the
function of each of the jumper blocks on the MPA-200.
4.1 J4 - Interrupt Configuration
J4 is a three pin jumper which determines whether or not a board’s interrupt is
sharable. By selecting pins 1 & 2, the user has the ability to share an interrupt with
other Quatech expansion cards. The MPA-200 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 5 summarizes the jumper block selections for J4. To maintain
100% ISA bus compatibility J7 should be set in No Interrupt Sharing mode.
Table 5 Jumper Block J4 Selections
2&3No Interrupt Sharing
1&2Interrupt Sharing
PinsInterrupt Function
4.2 J5 & J6 - Interrupt Level Selection
Jumper blocks J5 and J6 select the interrupt level that the MPA-200 utilizes. Inter-
rupt levels IRQ2 - IRQ7 reside on J5, while interrupt levels IRQ10 - IRQ12 and
IRQ14 - IRQ15 reside on J6. Table 6, and Table 7 summarize the jumper block
selections for J5 and J6. The IRQ levels are also marked on the MPA-200 silk-
screen for easy identification.
Table 6 Jumper block J5 selections.
6&12IRQ7
5&11IRQ6
4&10IRQ5
3&9IRQ4
2&8IRQ3
1&7IRQ2(9)
PinsInterrupt Level
Table 7 Jumper block J6 selections.
PinsInterrupt Level
11 Quatech Inc., MPA-200/300 Manual