Measurement-computing Personal488 rev.3.0 Bedienungsanleitung PDF herunterladen (Seite 43)

Personal488 for Windows 95/98/Me/NT/2000

04-09-01

Hardware Configuration Reference 4-3

AT488 Configurations

The I/O base address, IRQ, and DMA settings are switch/jumper selectable via the following locations on

the AT488 interface board: One 2-microswitch DIP switch labelled S1, one 4-microswitch DIP switch

labelled S2, two 14-pin headers labelled DACK and DRQ, and one 22-pin header labelled IRQ. The DIP

switch settings, and the arrangement of the jumpers on the headers set the hardware configuration.

For the next steps, make sure that the I/O address, IRQ, and DMA set on the interface board are different

from any existing ports in your system. A conflict results when two I/O addresses, IRQs, or DMAs are

the same. (As the exception, additional AT488 interfaces may share the same IRQ and DMA values.) If

there is a conflict, reconfigure the switch/jumper settings. Refer to the following figures as needed.

Configuring the AT488 Interface I/O Base Address

Interrupt Level 5

DMA 16-Bit Channel 5

Base Address

02E1

Interrupt

Level 5

AT488 Default Settings

DACK

DRQ

IRQ

AT488 I/O Base

Address Selections

42E1

62E1

22E102E1

5 6 7 0 1 2 3

OPEN

OPEN OPEN

OPEN

1 2

1 2 1 2

1 2

1 2 3 4

OPEN

The factory default I/O base address is

02E1

. If this creates a conflict, reset switch S1 according to the

figure and following table. The register addresses will be automatically relocated at fixed offsets from the

base address. If reset, record the new Input/Output (I/O) address being used.

Selected I/O Base

Address

02E1 22E1 42E1 62E1

Automatic Offset Addresses

Read Register Write Register

02E1 22E1 42E1 62E1

Data In Data Out

06E1 26E1 46E1 66E1

Interrupt Status 1 Interrupt Mask 1

0AE1 2AE1 4AE1 6AE1

Interrupt Status 2 Interrupt Mask 2

0EE1 2EE1 4EE1 6EE1

Serial Poll Status Serial Poll Mode

12E1 32E1 52E1 72E1

Address Status Address Mode

16E1 36E1 56E1 76E1

CMD Pass Through Auxiliary Mode

1AE1 3AE1 5AE1 7AE1

Address 0 Address 0/1

1EE1 3EE1 5EE1 7EE1

Address 1 End of String

The I/O base address sets the addresses used by the computer to communicate with the IEEE 488 interface

hardware on the board. The address is normally specified in hexadecimal and can be

02E1

22E1

42E1

, or

62E1

. The registers of the IOT7210 IEEE 488 controller chip and other auxiliary registers are then located

at fixed offsets from the base address.

Most versions of Driver488 are capable of managing as many as four IEEE 488 interfaces. To do so, the

interface configurations must be arranged to avoid conflict amongst themselves. No two boards may have

the same I/O address; but they may, and usually should, have the same DMA channel and interrupt level.

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 149 150

Kommentare zu diesen Handbüchern

Keine Kommentare

Measurement-computing Personal488 rev.3.0 Bedienungsanleitung Seite 43

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Hardware Measurement-computing Personal488 rev.3.0