Measurement-computing CIO-DIO24 Instrukcja Użytkownika Pobierz pdf (Strona 9)

CIO-DIO24 User's Guide Installing the CIO-DIO24

Factory-configured default settings

Switch/jumper Descr Default setting iption

Base address DIP switches Sets the base address 300h (768 decimal)

Interrupt level jumper pt level terrupt level set) Sets the interru "X" position (no in

Wait State jumper Enables/disables the on-board wait-state

generator.

Off (disabled)

Review the following informat n of a s

t the base address is to let InstaCal show you the correct settings. However, if you are

already familiar with setting ISA base addresses, you may use the base address switch description below to

puter’s I/O address space. To avoid

interference with other installed boards, each board must use unique addresses. The base address is the board’s

there is already a board in your

system that uses address 300 hex (768 decimal), leave the switches as they were set at the factory.

200

ion to change the default configuratio witch or jumper.

Base address

The easiest way to se

guide your base address selection.

Each I/O board uses one or more I/O address locations within your com

starting location that software writes to when communicating with the CIO-DIO24. A set of DIP switches is

used to set the base address. By placing the switch down, the CIO-DIO24 address decode logic is instructed to

respond to that address bit. A complete address is constructed by calculating the HEX or decimal number whi

corresponds to all the address bits the board has been instructed to respond to.

The board is shipped with the base address set to 300 hex (see Figure 2

). Unless

HEX

100

Figure 2. Base address switch

5432

In the default configuration, addresses s are up. Address 9

= 200 hex

(512 decimal), and address 8 = 100 hex (256 decimal). When added together they equal 300 hex (768 decimal).

9 and 8 are down, and all other

Disregard the numbers printed on the switch

When setting the base address, refer to the numbers printed in white on the printed circuit board.

Certain addresses are used by the computer. Other addresses are free, and may be used by the CIO-DIO24.

Refer to the following table for a list of I/O addresses.

s Summary

Hex Range Function Hex Range Function

PC I/O Addres

000-00F 8237 DMA #1 2C0-2CF EGA

020-021 8259 PIC #1 2D0-2DF EGA

040-043 8253 TIMER 2E0-2E7 GPIB (AT)

060-063 8255 PPI (XT) 2E8-2EF SERIAL PORT

060-064 8742 CONTROLLER (AT) 2F8-2FF SERIAL PORT

070-071 CMOS RAM & NMI MASK (AT) 300-30F PROTOTYPE CARD

080-08F DMA PAGE REGISTERS 310-31F PROTOTYPE CARD

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 19 20

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