)
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