Measurement-computing Micro 488/EX rev.2.1 Instrukcja Użytkownika Pobierz pdf (Strona 40)

Section 3 IEEE Operating Modes

3.6

If we are addressed to listen then we

ENTER

a line from the controller and print it

out.

400 'Listen state

410 PRINT#1,"ENTER"

420 LINE INPUT#1,A$

430 PRINT A$

440 GOTO 200

If we are addressed to talk then we

INPUT

a line from the keyboard and

OUTPUT

it to the controller.

500 'Talk state

510 LINE INPUT A$

520 PRINT#1,"OUTPUT;";A$

530 GOTO 200

It is also possible to detect these conditions with the

ARM

event

DOMACRO

commands and handle them in an exception as described in Section 5. The

various arm conditions and their meanings are as follows:

SRQ

The internal Service Request state is set. See the

SPOLL

command in Section 5.

PERIPHERAL

the Micro488/EX is in the Peripheral (*CA) operating

mode.

CONTROLLER

the Micro488/EX is the Active Controller (CA).

TRIGGER

the Micro488/EX, as a Peripheral, has received a Trigger

bus command.

CLEAR

the Micro488/EX, as a Peripheral, has received a Clear bus

command.

TALK

the Micro488/EX is in the Talk state and can

OUTPUT

to the

bus.

LISTEN

the Micro488/EX is in the Listen state and can

ENTER

from

the bus.

IDLE

the Micro488/EX is in neither the Talk nor Listen state.

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