Interrupt 6Fh - Function 04h

I've been working with an old 386 based machine writing some machine code to send data across a network at the University of York http://www.york.ac.uk/

I found this useful dos call:

Int 6Fh, Function 04h

Purpose: Transmit data over the network

Registers at call:

AH=04h

DS:BX > send data description record

DS:DX > data (max 1024 bytes)

Note: CF is set on error with the error code in AX

If the first byte has its high order bit set, the message is directed to the CT_RGATE vector