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GPIB
IEEE488
MANUAL
USER
COMMANDS
ABORT
- Terminate
the current
command issued
by the
IBM.
The
command executes
an IFC and resets
the
IBM board
addressed.
DMA and Interrupts
are
disabled.
The
IBM-PC is assumed to be the main system controller
and unconditionally
takes
control
of
the
bus and
remains
the
controller
in
charge
until
PASCTL
command is executedNo
device
is
necessary.
COMMANDS FORMAT:
"ABORT"
EXAMPLE:
xxx10 CMD$ ="ABORT"
'command format
xxx20
DEF SEG = &HCOOO
'driver
subroutine
xxx30
CALL 1~488 (CMD$, VAR%, FLG%, BRD%)
'execute
command
xxx40
IF NOT FLG% THEN 100
'test
for
errors
?
xxx50
PRINT "ERROR *';HEx$(FLG%);"
IN LINE
70"
xxx60
END
xx100
. . . . . . user
program
continues
. . . . . . . . .
Note:
The VAR% is used as a dummy variable
and no change
occurs
to
the
contents
of
VAR%. This
variable
may be first
declared
inside
the CALL statement
at execution
for
convenience.
Page 15
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