SS - Starting a session with a System DCB

Note: This service is currently treated as identical to SB and is retained for compatibility. See SB - Starting a session with a BLDL identifier for more information and restrictions.

Table 1. SS parameter list
Parameter	Usage	Format	Content
1	in	structure	'SS', X'0001'
2	in/out	binary word	mtoken
3	in	structure	DCB
4	in	structure	Directory entry or DD name. Only the first 8 bytes are used.