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PCL-858 User's Manual
IRQ Setting (JP1)
All channels in PCL-858 series share the same interrupt (IRQ), and
interrupt status register is available for determining the interrupt
source. Select an IRQ which is not already in use by another card in
the system. If you are installing more than one PCL-858, set them to
different IRQ number. Jumper Bank JP1 controls the card IRQ. Simply
place the jumper on the interrupt level as shown in the following
figure.
Interrupt status register setup (SW2, Vector
address)
When data arrives at one of the eight ports, it will generate an
interrupt in the interrupt register. The software can read this, and
identify immediately which port generated the interrupt. This save
time, and makes programming easier. In DOS and Windows 3.1
environment, when a data bit of the interrupt status register is set to 0,
the corresponding channel is select to generate an interrupt, and vice
versa for Windows 95/98/NT system. If the bit is 1, then no interrupt
status register, and vice versa for Windows 95/98/NT system, as shown
in the following figure and table.
15 12 11 10 9 7 6 5 4 3
A9
A8
A7
A6
A5
A4
A3
Speed
Summary of Contents for PCL-858
Page 1: ...PCL 858 8 Port RS 232 Interface Card...
Page 4: ...Chapter 1 Introduction 5 1 Introduction C H A P T E R...
Page 8: ...Chapter 1 Introduction 9 Figure 1 1 Switch and jumper layout...
Page 9: ...10 PCL 858 User s Manual...
Page 10: ...2 Hardware Installation C H A P T E R...
Page 12: ...Chapter 2 Hardware Installation 13...
Page 18: ...3 Software Installation C H A P T E R...
Page 22: ...Chapter 4 Wiring 23 4 Wiring C H A P T E R...
Page 27: ...28 PCL 858 User s Manual...
Page 28: ...Appendix A PC I O Address Assignments 29 A PC I O Address Reference A P P E N D I X...
Page 30: ...Appendix B Quick Reference 31 B Quick Reference A P P E N D I X...