The I/O status block(IOSB) for all LAN driver functions is shown in IOSB Contents. I/O Function Codes lists the completion status returned for these functions.(The OpenVMS system messages documentation provides explanationsand suggested user actions for these status codes.)
Figure 30 IOSB Contents
The first longword of the IOSB returns, in addition to thecompletion status, either the size (in bytes) of the data transferor the size (in bytes) of the attribute buffer (P2) returned bya sense mode function. The second longword returns the unit andline status bits listed in Ethernet Controller Unit and Line Status and the error summary bits listed in Error Summary Bits.
HP OpenVMS I/O User's Reference Manual
Local Area Network (LAN) Device Drivers
