INT 2A - NETWORK (Microsoft,LANtastic) - EXECUTE NetBIOS REQUEST
AH = 04h
AL = error retry
00h automatically retry request on errors 09h, 12h, and 21h
01h no retry
ES:BX -> Network Control Block (see INT 5C"NetBIOS")
Return: AX = 0000h if successful
AH = 01h on error
AL = error code
Note:   invokes either INT 5B or INT 5C as appropriate
SeeAlso: AX=0500h,INT 5B,INT 5C"NetBIOS"

See also: 2A01

2A04 - NETWORK (Microsoft,LANtastic) - EXECUTE NetBIOS REQUEST