Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 347)

15B. Driver488/SUB, W31, W95, & WNT III. COMMAND REFERENCES - 15. Command References
III-332 Personal488 User’s Manual, Rev. 3.0
This is a new function in Driver488/W95. This function is similar to the MakeDevice function except
that MakeNewDevice will create a new device based on the parameters specified, instead of simply
cloning an existing device. To change the default values assigned to the device, it is necessary to call
the appropriate configuration functions such as
BusAddress , IOAddress , and TimeOut .
MyListenAddr
SYNTAX int pascal MyListenAddr (DevHandleT devHandle);
devHandle refers to either an interface or an external device. If devHandle
refers to an external device, the command acts on the associated interface.
RETURNS -1 if error
MODE CA
BUS STATES ATN, MLA
SEE ALSO MyTalkAddr, Talk, Listen, SendCmd
EXAMPLES errorcode = MyListenAddr (ieee);
The MyListenAddr command addresses the interface to Listen.
MyTalkAddr
SYNTAX int pascal MyTalkAddr (DevHandleT devHandle);
devHandle refers to either an interface or an external device. If devHandle
refers to an external device, the command acts on the associated interface.
RETURNS -1 if error
MODE CA
BUS STATES ATN, MTA
SEE ALSO MyListenAddr, Listen, SendCmd
EXAMPLES errorcode = MyTalkAddr (ieee);
The MyTalkAddr command addresses the interface to Talk.
OnEvent
Driver488/SUB only
SYNTAX int pascal OnEvent(DevHandleT devHandle,UserHandleFP
handler,OpaqueP argument);
devHandle refers to either an interface or an external device.
handler is a user-specified interrupt-handler function that is to perform some
function, defined by the user, when one of the Arm ed conditions occur.
argument is the 32-bit argument passed to the handler function. It may be used
to point to information used by the handler function.
RETURNS -1 if error
MODE Any
BUS STATES None
SEE ALSO Arm, Disarm, LightPen
EXAMPLE void
Handler(OpaqueP arg)
{
printf(“Interrupt handler got arg = %ld\n”,arg);
}
errorcode = OnEvent(ieee,Handler,(OpaqueP)(15));
The OnEvent command specifies the function to be called when an Arm ed event occurs. The function
handler is passed the specified 32-bit argument entry. The handler can use the argument to identify
the portion of the program that set up the OnEvent , and then use Status and other commands to