National Instruments AT-MIO-16X - Manual (Page 24)

Chapter 2 Configuration and Installation
AT-MIO-16X User Manual 2-2 © National Instruments Corporation
Figure 2-2. AT-MIO-16X with 68-Pin I/O Connector Parts Locator Diagram
Board Configuration
The AT-MIO-16X contains one DIP switch to configure the base
address selection for the AT bus interface. The remaining resource
selections, such as DMA and interrupt channel selections, are
determined by programming the individual registers in the
AT-MIO-16X register set. The general location of the registers in the
I/O space of the PC is determined by the base address selection, whereas
the specific location of the registers within the register set is determined
by the AT-MIO-16X decode circuitry.
AT Bus Interface
Operation of the AT-MIO-16X multifunction I/O board is controlled
through accesses to registers within the board register set. Some of the
registers in the register set retain data written to them to determine
board operation. Other registers in the register set contain important
status information necessary for proper sequencing of events. Still other
registers perform functions by accessing them either by reading from or
writing to their location. However, these registers do not retain
pertinent data when written to, nor do they provide pertinent status
information when read.
1 Product Name, Assembly Number, and Revision Letter 2 Fuse 3 U112 4 Spare Fuse
1
2 3 4