Measurement-computing CIO-DAS801 Manual do Utilizador descarregar pdf (Página 12)

CIO-DAS801 User's Guide Installing the CIO-DAS801

Interrupt level

In order to take advantage of high speed transfers, you must provide the board with an interrupt that is not used

by other devices in your computer. Use the jumper block labeled IR (above the PC bus interface) to select an

interrupt level between 2 and 7, or to disable interrupts (X). By default, the board is shipped with no interrupt

level set (the jumper is in the 'X' position). Figure 5 shows the interrupt level set for IRQ 5.

2 3 4 5 6 7 X

Figure 5. Interrupt level select jumper

Set the interrupt level jumper if your software requires it. The Universal Library and other programs which take

advantage of the REP-INSW high speed transfer capability of the board require an interrupt. If you set the

interrupt jumper, check your PC's current configuration for interrupt conflicts. Refer to the table below for

typical IRQ assignments.

IRQ assignments

Name

Description

Name

Description

NMI

Parity

IRQ8

Real Time Clock (AT)

IRQ0

Timer

IRQ9

Re-Directed to IRQ2 (AT)

IRQ1

Keyboard

IRQ10

Unassigned

IRQ2

Reserved (XT)

INT 8-15 (AT)

IRQ11

Unassigned

IRQ3

COM OR SDLC

IRQ12

Unassigned

IRQ4

COM OR SDLC

IRQ13

80287 Numeric CO-P

IRQ5

Hard Disk (XT)

LPT (AT)

IRQ14

Hard Disk

IRQ6

Floppy Disk

IRQ15

Unassigned

IRQ7

LPT

Note: IRQ8-15 are AT only

Wait state jumper

Enable the wait state jumper if you have a computer with an I/O bus transfer rate which is too fast for the CIO-

DAS801, or if the board fails sporadically in random ways.

To enable the wait state, set the jumper labeled WS1 to the ON position. Enabling the wait state causes the

personal computer's bus transfer rate to slow down whenever the CIO-DAS801 is written to or read from. This

jumper is shown in Figure 6 configured for OFF (wait state is disabled).

ON OFF

WS1

Figure 6. Wait State jumper

The wait state generator on the CIO-DAS801 is only active when the CIO-DAS801 is being accessed. Your PC

will not be slowed down in general by using the wait state.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 21 22

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