Interrupt Connections - Microcomputer Systems MSI-P602 User Manual

do not install JP2-13 so that COM3 and COM4 are selected for
the primary and secondary serial ports. If your CPU contains
COM1 thru COM4 ports and you are only using COM1 and
COM2, then disable COM3 and COM4 of the CPU card. If this
is not permissible, then you will have to select a base address
other than 0 by using jumpers for JP2-1 thru JP2-11. UART
addresses in this case are given in Table 1.
Table 1. Card UART Addresses for JP2-13 Selection.
Jumper JP2-13
Installed
Uninstalled
**
COM1 = 3F8H
COM2 = 2F8H
COM3 = 3E8H
COM4 = 2E8H
where H denotes hexadecimal notational.
C. Interrupt Connections
Interrupt connections are implemented by jumpers JP1-1 thru
JP1-12. The steps in the procedure are as follows.
1) Odd numbered pins 1 thru 11 are connected to processor
interrupts IRQ9 thru IRQ3, as shown in Fig. 4. Wire-wrap
connections are necessary to select the desired interrupts as
described below.
2) JP1-2 is connected to the 1 PULSE/SEC output of the GPS
module for use in sychronizing data acquisitions. This can
jumpered to a desired interrupt, IRQ4 thru IRQ9, of JP1. The
signal is a tri-state gate which permits connecting multiple
sources to the same IRQx interrupt.
3) JP1-4 is connected to the interrupt request signal of the
primary UART (TSIP protocol). This can jumpered to a desired
interrupt, IRQ4 thru IRQ9, of JP1. The signal is a tri-state gate
which permits connecting multiple sources to the same IRQx
interrupt.
Page 8
Primary UART (U4)
base address + COM1**
base address + COM3
Secondary UART (U5)
base address + COM2
base address + COM4
MSI-P602 User Manual