K - end-or-identify – Measurement Computing Digital488/80A User Manual
Page 66
K - End-Or-Identify
SYNTAX
Kn
Define mode
n
of
EOI
, where
n = 0
or
1
.
K0
(Default)
EOI
enabled; assert
EOI
on last byte transferred.
K1 EOI
disabled; do not assert
EOI
on last byte transferred.
K?
Returns the current
EOI
selection.
DESCRIPTION
The End-Or-Identify (
EOI
) line is one of five bus management lines on the IEEE 488 bus. It is used by a Talker to
indicate the end of a multiple byte transfer sequence. Using the End-Or-Identify (
K
) command, the controller can
enable or disable the
EOI
mode by programming the Digital488/80A from the bus. In mode
K0
, the
EOI
line is
asserted by the Digital488/80A on the last byte of every bus output string. In mode
K1
, the
EOI
function is disabled
(except when using the binary Data Formats
F4
and
F5
).
EXAMPLE
PRINT#1,"OUTPUT08;K1X"
Line 1: Disable
EOI
assertion on last byte.
PRINT#1,"OUTPUT08;K?"
Line 2: Request
EOI
selection from Digital488/80A.
PRINT#1,"ENTER08"
INPUT#2,A$,
PRINT A$
Line 5: Display shows:
K1
60 Digital488/80A Commands
967695
Digital488/80A User's Manual