MFS formatting for the 3270 or SLU 2 master terminal

If the IMS master terminal is a 3270 or SLU 2 display device defined as a 3275, 3277 model 2, or 3270-An with SIZE=24x80, you can select the IMS-supplied format that uses MFS. To use the IMS-supplied format you must specify OPTIONS=(...,FMTMAST,...) in the COMM macro during IMS system definition.

When this format is used, the display screen is divided into four areas and several program function keys are reserved.

The four areas of the screen are:
Message Area
This area is for IMS command output (except /DISPLAY and /RDISPLAY), message switch output, application program output that uses a MOD name beginning with DFSMO, and IMS system messages.
Display Area
This area is for /DISPLAY and /RDISPLAY command output.
Warning Message Area
This area can display the following warning messages:
  • MASTER LINES WAITING
  • MASTER MESSAGE WAITING
  • DISPLAY LINES WAITING
  • USER MESSAGE WAITING
You can also enter an IMS password in this area.
User Input Area
This area is for your input.

Related reading: The format and use of these screen areas is described in IMS Version 15 System Administration.

The IMS-supplied master terminal format defines literals for nine of the 3270 or SLU 2 program function (PF) keys. PF keys 1 through 7 can be used for IMS command input. Pressing a PF key inserts a corresponding command into the first message segment in front of the entered data. The keys and their corresponding commands are:
PF Key
Command
1
/DISPLAY
2
/DISPLAY ACTIVE
3
/DISPLAY STATUS
4
/START LINE
5
/STOP LINE
6
/DISPLAY POOL
7
/BROADCAST LTERM ALL

The PF11 key issues a NEXTMSGP request, and the PF12 key requests the copy function.

Do not change the definitions for the master terminal format, with the exception of the PFK literals.

When the master terminal format is used, any message whose MOD name begins with DFSMO (except DFSMO3) is displayed in the message area. Any message whose MOD name is DFSDSPO1 is displayed in the display area. Messages with other MOD names generate the warning message: USER MESSAGE WAITING.