IBM s/390 manual 5.8 x3270 client

5.8 x3270 client

The FLEX-ES product distribution includes a copy of x3270. This is based on the freely distributable x3270 package, but with a few modifications. In general, it is intended only for use on the ThinkPad/EFS system itself, under Linux. Users connecting from other platforms will probably use whatever TN3270 clients are available for their platforms. For this redbook project, we used IBM’s PCOM package—usually from OS/2 machines.

An x3270 window (on the Linux console) is started with the command:

$x3270 -model 3 -keymap pc -port tn3270 localhost &

					+--	run in background
				+---------		local system (from /etc/hosts)
			+--------------------			port tn3270 (from	/etc/services)
		+-------------------------------				in /usr/X/lib/app-defaults/X3270
	+	-----------------------------------------				models 2, 3, 4, 5	available
+-------------------------------------------------						command

You can optionally identify the FLEX-ES terminal session you want to connect to like this:

$x3270 -model 3 -keymap pc -port tn3270 localhost:t91f &

In this case, your resources definition (or a prior FLEX-ES mount command) must have defined a 3270 device named t91f. If you do not identify a specific terminal connection, the x3270 session is connected to the Terminal Solicitor. In a FLEX-ES system, port tn3270 normally resolves (via /etc/services) to port 24, the default port for the Terminal Solicitor.

The x3270 command must be in the current search path, of course.9 It is in the /usr/flexes/bin directory, and we suggested placing this in the current PATH. The model parameter refers to

3270 models:

Model Characteristics

224 lines x 80 columns

3 32 lines x 80 columns

4 43 lines x 80 columns

5 27 lines x 132 columns

These are standard 3270 family model designations. Model 3 use is perhaps the most common and that is what we used.

Important keyboard mapping for x3270 includes:

Function	Keys Used
PA1	Left-Alt + 1		(hold down the left Alt key and press 1)
PA2	Left-Alt + 2
Clear	Left-Alt + c	or	Left-Alt + Home
Enter	Enter		(large Enter key performs 3270 Enter function)
NewLine	Left-Alt + Enter		(performs 3270 New Line function)
SysRq	Left-Alt + s		(the System Request key (usually for SNA))
F13	Left-Alt + F1		(and so forth for F14 - F24)
EraseEOF	Left-Alt + f
Insert	Left-Alt + i
Del	Delete
BackTab	Shift + Tab		(tab backwards)

9You must make certain than another x3270 program does not appear first in the search path, as discussed in “X3270” on page 20.

48S/390 PID: ThinkPad Enabled for S/390