Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 343)

15B. Driver488/SUB, W31, W95, & WNT III. COMMAND REFERENCES - 15. Command References
III-328 Personal488 User’s Manual, Rev. 3.0
Hello
SYNTAX int pascal Hello(DevHandleT devHandle, char *message);
devHandle refers to either an IEEE 488 interface or an external device. If
devHandle refers to an external device, the Hello command acts on the
hardware interface to which the external device is attached.
message is a character pointer that contains the returned message.
RETURNS -1 if error.
MODE Any
BUS STATES None
SEE ALSO Status, OpenName, GetError
EXAMPLE char message[247];
result = Hello(ieee,message);
printf(“%s\n”,message);
The Hello command is used to verify communication with Driver488, and to read the software
revision number. If a non-null string pointer is passed, Hello fills in up to 247 bytes in the string. The
application must ensure that sufficient space is available. When the command is sent, Driver488
returns a string similar to the following:
Driver488 Revision X.X (C)199X IOtech, Inc.
where X is the appropriate revision or year number.
IntLevel
Driver488/SUB and Driver488/W31 only
SYNTAX int pascal IntLevel(DevHandleT devHandle, int channel);
devHandle refers to either an IEEE 488 interface or an external device. If
devHandle refers to an external device, then the IntLevel command acts on
the hardware interface to which the external device is attached.
channel is a valid interrupt channel, or -1 to specify NONE .
RETURNS -1 if error
MODE Any
BUS STATES None
SEE ALSO DmaChannel, TimeOut
EXAMPLE errorcode = IntLevel(ieee, 7);
The IntLevel command specifies the hardware interrupt level that is used by the I/O adapter.
Driver488 uses hardware interrupts, if available, to improve the efficiency of I/O adapter control and
communication. The interrupt level is specified by an integer in the range 2 through 15 as appropriate
to the host computer bus and interface card type. The interrupt level value must match the hardware
settings on the interface card.