Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 364)

III. COMMAND REFERENCES - 15. Command References 15B. Driver488/SUB, W31, W95, & WNT
Personal488 User’s Manual, Rev. 3.0 III-349
Stop
SYNTAX int pascal Stop(DevHandleT devHandle);
devHandle refers to either an interface or an external device. If devHandle
refers to an external device, the Stop command acts on the hardware interface
to which the external device is attached.
RETURNS -1 if error
MODE Any
BUS STATES ATN (Controller)
None (Peripheral)
SEE ALSO Enter, Output, Buffered
EXAMPLE errorcode = Stop(ieee);
The Stop command halts any asynchronous transfer that may be in progress. If the transfer has
completed already, then Stop has no effect. The actual number of characters transferred is available
from the Buffered command.
SysController
Driver488/SUB and Driver488/W31 only
SYNTAX int pascal SysController(DevHandleT devHandle, bool flag);
devHandle refers to either an interface or an external device. If devHandle
refers to an external device, the SysController command acts on the
hardware interface to which the external device is attached.
flag specifies whether or not Driver488 is to be System Controller. If flag is
ON , then Driver488 becomes System Controller. If flag is OFF , then
Driver488 ceases to be System Controller.
RETURNS -1 if error
MODE Any
BUS STATE IFC, *IFC (flag TRUE)
None (flag FALSE)
SEE ALSO Abort, Reset
EXAMPLES errorcode = SysController(ieee,ON);
The SysController command specifies whether or not the IEEE 488 interface card is to be the
System Controller. The System Controller has ultimate control of the IEEE 488 bus, and there may be
only one System Controller on a bus. If Driver488 is a Peripheral (that is, not System Controller), it
may still take control of bus transactions if the Active Controller passes control to Driver488.
Driver488 may then control the bus and, when it is done, pass control back to the System Controller or
other computer, which then becomes the Active Controller.
Talk
SYNTAX int pascal Talk(DevHandleT devHandle, char pri, char sec);
devHandle refers to either an interface or an external device. If devHandle
refers to an external device, the Talk command acts on the associated
interface.
pri and sec specify the primary and secondary addresses of the device which is
to be addressed to Talk.