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Category: network

INT 61 - PC/TCP kernel v2.05+ - "set_option" - SET AN OPTION ON A DESCRIPTOR

	AH = 20h
	BX = network descriptor
	CX = length of buffer (usually 04h)
	DS:DX -> buffer containing option
	SI = (ignored by v2.2-)
	DI = option to set (see #03468)
Return: CF clear if successful
	CF set on error
	    AX = error code (see #03319 at INT 61"FTP Software")
Notes:	Beame&Whiteside's BWPCTCP shim only supports options 01h and 0Bh; all
	  others return CF clear
	v2.11 reportedly stores the actual 32-bit value of an option in DS:DX
	  rather than using a buffer in memory
SeeAlso: INT 61"FTP Software",INT 61/AH=00h"PC/TCP",INT 61/AH=21h

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