Permits the data link control (DLC) to change certain profile parameters after the Multiprotocol Quad Port (MPQP) device has been started.
The MP_CHG_PARMS operation permits the DLC to change certain profile parameters after the MPQP device has been started. The cmd parameter in the mpioctl entry point is set to the MP_CHG_PARMS operation. This operation can interfere with communications that are in progress. Data transmission should not be active when this operation is issued.
For this operation, the extptr parameter points to a chng_params structure. This structure has the following changeable fields:
| chg_mask | Specifies the mask that indicates which fields are to be changed. The possible choices are:
More than one field can be changed with one MP_CHG_PARAMS operation. |
| rcv_timer | Identifies the timeout value used after transmission of final frames when waiting for receive data in 0.1 second units. |
| poll_addr | Specifies the poll address. Possible values are Synchronous Data Link Control (SDLC) or Binary Synchronous Communications (BSC) poll addresses. |
| sel_addr | Specifies the select address. BSC is the only possible protocol that supports select addresses. |
The mpioctl entry point.
The CIO_GET_STAT mpioctl MPQP Device Handler Operation, CIO_HALT mpioctl MPQP Device Handler Operation, CIO_START mpioctl MPQP Device Handler Operation, CIO_QUERY mpioctl MPQP Device Handler Operation, MP_START_AR and MP_STOP_AR mpioctl MPQP Device Handler Operations.