P - Port Select
SYNTAX
Pn
Select port(s)
n
for data I/O, where
n =
value from
0
to
5
.
P0
(Default) Select all 5 ports.
P1
Select Port 1.
P2
Select Port 2.
P3
Select Port 3.
P4
Select Port 4.
P5
Select Port 5.
P?
Returns current port(s) selection
n
.
DESCRIPTION
The Port Select (
P
) command determines which port is selected for data input/output. In the default mode
P0
, all 5
ports are selected. Modes
P1
through
P5
select a specific 8-bit port.
It is recommended that the Bus Input/Output (
G
) command be used with mode
P0
to select which type of port data
(input or output) is sent, when the Digital488/80A is addressed to Talk. Data in modes
P1
through
P5
are input or
output in groups of 8 bits.
EXAMPLE
PRINT#1,"CLEAR08"
Line 1:
Reset the Digital488/80A.
PRINT#1,"OUTPUT08;P4X"
Line 2:
Select Port 4.
64 Digital488/80A Commands
967695
Digital488/80A User's Manual
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