INT 68 - APPC/PCIBM PC - CHANGE NUMBER OF SESSIONS
	AH = 06h
	DS:DX -> control block (see #03705)
Return: control block updated


Format of APPC/PCIBM PC "Change Number of Sessions" control block:
Offset	Size	Description	(Table 03705)
 00h 12 BYTEs	reserved
 0Ch	WORD	1500h (verb "Change Number of Sessions")
 0Eh  6 BYTEs	00h
 14h	WORD	(big-endian) primary return code (see #03681)
 16h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	(big-endian) secondary return code (see #03668,#03706)
 1Ah  8 BYTEs	(big-endian) logical unit ID
 22h  8 BYTEs	blanks
 2Ah  8 BYTEs	(big-endian) partner logical unit name
 32h  8 BYTEs	(big-endian) mode name
 3Ah	BYTE	bit 7: use MODE_NAME_SELECT_ALL rather than MODE_NAME
		bit 6: set negotiable values
 3Bh	BYTE	partner logical unit mode session limit
 3Ch	BYTE	minimum CONWINNERS_SOURCE
 3Dh	BYTE	maximum CONWINNERS_TARGET
 3Eh	BYTE	automatic activation
 3Fh	BYTE	00h
 40h	BYTE	flags
		bit 7: drain target
		bit 6: drain source
		bit 5: target responsible, not source


(Table 03706)
Values for secondary return code (see also AH=01h/SF=1B00h):
 0000h	accepted
 0001h	negotiated
 0003h	bad logical unit ID
 0004h	allocation failure, no retry
 0005h	allocation failure, retry
 0151h	can't raise limits
 0153h	all modes must reset
 0154h	bad SNASVCMG limits
 0155h	minimum greater than total
 0156h	mode closed (primary return code = 1)
	CNOS mode closed (primary return code = 18h)
 0157h	bad mode name (primary return code = 1)
	CNOS bad mode name (primary return code = 18h)
 0159h	reset SNA drains
 015Ah	single not SRC response
 015Bh	bad partner logical unit
 015Ch	exceeds maximum allowed
 015Dh	change SRC drains
 015Eh	logical unit detached
 015Fh	CNOS command race reject