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UNLINK

Command code
. Hex 70 - wait option

Fields required
. NCB_LANA_NUM  (number of the adapter you want to unlink)

Field returned
. NCB_RETCODE
. NCB_CMD_CPLT

Immediate return codes
. Hex 00    - Command has no immediate errors
. Hex 03    - Invalid command
. Hex 21    - Interface busy
. Hex 23    - Invalid number in NCB_LANA_NUM field
. Hex 40/4F - Unusual network condition
. Hex 50/FE - Adapter malfunction

Final return codes
. Hex 00    - Command complete
. Hex 03    - Invalid command
. Hex 40/4F - Unusual network condition
. Hex 50/FE - Adapter malfunction

Function
This command is used only with the remote program load (RPL) feature. To see
if this command is actually supported, refer to the specific NETBIOS
implementation that ypu are using. The command applies only if a call to
IBMNETBOOT was made at power-up time of this computer.
The session with IBMNETBOOT is dropped when this command is issued. The BIOS
also ends the INT 13 redirected to the network. For more information on RPL,
refer to the technical reference manual for your adapter (not applicable to
the IBM PC Network Adapter).