IODEV parameter

Type of I/O device

Summary

Default value

1

Parameter type

User

Where set

On user's parameter line

Related products

All

Introduced

Model 204 V2.1 or earlier

Description

IODEV specifies the input/output device type.

Valid settings of IODEV are:

IODEV	Access method/device type
1	CCAIN/CCAPRINT (User 0 only)
3	BSAM (see Uses of IODEV=3 at Defining the user environment (CCAIN))
7	SNA Communications Server 3270
11	Remote User Language thread (full screen)
19	VTAM or TCP/IP (Horizon SQL thread)
23	Host Language IFAM thread
25	FUSI thread, new in version 7.6 of Model 204. These are created implicitly; as many threads are created as is the value of the FUNTSKN parameter. There is no reason to attempt to define these threads explicitly.
27	VTAM (Horizon thread)
29	Remote User Language thread (line-at-a-time)
37	SNA Communications Server 3767 and NTO (z/OS) Note: Value 37 is no longer supported as of Model 204 version 7.6.
39	IUCV User Language thread (line-at-a-time)
41	IUCV User Language thread (full screen)
43	IUCV Host Language Interface thread
45	CMS line-at-a-time console. This z/VM device setting is an ALTIODEV value; is cannot be specified on the user's parameter line.
47	CMS full screen console. This z/VM device setting is an ALTIODEV value; is cannot be specified on the user's parameter line.
49	VTAM or TCP/IP Horizon Remote Command Line (RCL) thread.
51	SNA Communications Server (Parallel Query Option/204 thread)

Note: In addition to the above table of valid settings of the IODEV parameter, the value of IODEV on some Model 204 threads can be set as a result of other parameters:

Parameter	Recommended	Meaning
SDAEMDEV	15	IODEV number for Sdaemons
TNDEV	21	IODEV number for TNSERV threads