User`s guide

68 DC 900-1516D
ICP2432 User’s Guide for OpenVMS Alpha (DLITE Interface)
4.2.4.4 IO$_STARTDATA
The IO$_STARTDATA function sets the node number of the read request for this chan-
nel number.
Condition Value Returned
SS$_NORMAL
Request completed successfully
SS$_ILLSEQIOOP
Driver was not in node auto-assignment mode
SS$_INVMODE
Software was not downloaded
The device-specific information of the I/O Status Block (IOSB) is set to the node num-
ber assigned by the driver.
Parameters
P1
0
P2
0
P3
0
P4
0
P5
0
P6
0
Description
The IO$_STARTDATA function must be requested after the node auto-assignment flag
in the
IO$_STARTMPROC function is set. If the driver is in node auto-assignment
mode, the
IO$_STARTDATA function must be requested before the IO$_READxBLK or
IO$_WRITExBLK function is requested. If the node auto-assignment flag isn’t set, the
driver returns the
SS$_ILLSEQIOOP error. See Section 4.4 on page 79 for more infor-
mation about node auto-assignment.
12/3/98 Leslie:
Roger says this
is correct but
he will work
on better
wording (he
wants a better
term than
“auto
assignment”.