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© National Instruments Corporation
2-1
AT-MIO-16D User Manual
Chapter 2
Configuration and Installation
This chapter describes the AT-MIO-16D jumper configuration, installation of the AT-MIO-16D
board into the PC, signal connections to the AT-MIO-16D board, cable wiring, and handshake
timing diagrams for the DIO-24 circuitry of the AT-MIO-16D.
Board Configuration
The AT-MIO-16D contains 14 jumpers and one dual inline package (DIP) switch to configure the
AT bus interface and analog input/output (I/O) settings. The DIP switch is used to set the base I/O
address. Three jumpers are used as interrupt and direct memory access (DMA) selectors. The
remaining 11 jumpers are used to change the analog input and analog output circuitry. The
jumpers are shown in the parts locator diagram in Figure 2-1. Jumpers W1, W4, W6, and W9
configure the analog input circuitry. Jumpers W2, W3, W7, W8, W10, and W11 configure the
analog output circuitry. Jumper W5 selects the clock signal used by the Am9513A Counter/Timer
and the clock pin on the Real-Time System Integration (RTSI) bus. Jumpers W12 and W13 select
the DMA channel and the interrupt level, respectively. Jumper W14 selects the DIO-24 circuitry
interrupt enable line.
AT Bus Interface
The AT-MIO-16D is configured at the factory to a base I/O address of hex 220, to use DMA
channels 6 and 7, to use interrupt level 10 for the MIO-16 circuitry, and to use interrupt enable line
PC4 with interrupt level 5 for the DIO-24 circuitry. These settings, as shown in Table 2-1, are
suitable for most systems. However, if your system has other hardware at this base I/O address,
DMA channel, or interrupt level, you will need to change these settings on the other hardware or
on the AT-MIO-16D as described in the following pages.
Table 2-1. AT Bus Interface Factory Settings
Base I/O Address
Hex 220
U61
1 2
3 4 5
A9
A8
A7
A6
A5
(The shaded portion indicates the side
of the base address switch that is
pressed down.)
DMA Channel
DMA 1 = DMA Channel 6
DMA 2 = DMA Channel 7
W12: R6: A-B A6: A-B
W12: R7: B-C
A7: B-C
Interrupt Level
Interrupt levels 5 and 10
selected
W13: IRQ 10 (MIO-16)
IRQ 5 (DIO-24)
DIO Interrupt
Enable Line
PC4
W14: Row PC4
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