Control Functions
PSI BOX PLUS+ Reference
DCL.
Sends The Device Clear Command.
_____
_______________________________
Purpose.
The universal command Device Clear is sent to the
__________
IEEE bus.
The DCL command is used to send all bus devices to a
device dependent state.
The PSI BOX asserts ATN and becomes the active
controller, then the IEEE command DCL, hex 14h decimal 20, is
sent over the IEEE bus. After the command has been sent the
ATN remains true, PSI BOX is the active controller.
The DCL command is used automatically in the CLEAR
routine but it can be called separately to perform your own
device clear routine. The DCL command can also be sent by
using CMD 20 or CMD 148
Format.
DCL
_________
Params.
None.
_________
Returns.
None.
__________
Example.
________
_
BUS DCL
Bus Activity.
___________
_
assert ATN if not already so
DCL
Chapter 8
Page 95
