Using Your Keyboard; Function Keys; Understanding Your Status Line; Typematic Keys - IBM 3174 Reference Manual

Using Your Terminal as a Data General Dasher D210
Using Your Keyboard
Many keys on the 3270 terminal keyboard function differently when the terminal Is
acting as a Dasher D210. Referring to Appendix A, "Terminal Keyboard Maps,"
select the keyboard map that corresponds to the type of 3270 keyboard you are
using. For example, If you are using a Converged keyboard, use the map called
"Using a 3270 Converged Keyboard as a Data General Dasher D210 Keyboard" on
page A-36.
Typematic Keys
BREAK Function
A typematic key Is a key that repeats Its function when you hold It down. All keys
that are typematic on your 3270 keyboard continue to be typematic. The actual DG
D210 has a REPT key which Increases the typematic rate to 30 characters per
second. The 3270 keys repeat at the rate of the specific keyboard In use.
The BREAK function acts differently depending on the application program that
your system Is using. This function produces a short break of 0.2333 second; a
Shift BREAK function produces a long break of 3.5 seconds. See your system
administrator for more Information.
Controi Mode/Control Shift
Control functions are provided by a control key on keyboards where a control key
Is available. Depending on the terminal type, the control key provides either a
Control Shift or Control Mode function. The Control Shift function allows you to
select multiple functions while the control key Is pressed. The Control Mode
function allows you to enter only one control sequence. Both Control Shift and
Control Mode are Indicated by a left-facing arrow displayed In the OIA.
On all keyboards, using the extension mode key or the Extended Select key
followed by the control key Invokes the Control Mode on/off function. See
Figure 1-2 on page 1-8 through Figure 1-4 on page 1-9 for the location of these
keys.
Function Keys
A Pseudo-shift state Is provided to allow shifted versions of PF13—PF24 on Base
and Enhanced keyboards. The Pseudo-shift key Is the DUP or PA1 key on the Base
and the Enhanced keyboards. An "S" Is displayed In column 40 of the status line
when you are In Pseudo-shift state.
Pseudo-shift only applies to keys as defined In the keyboard maps. Any other keys
pressed during this state cause a keyboard lock. Pressing the DUP or PA1 key
again also causes an exit from Pseudo-shift.
Control and Pseudo-shift are not valid at the same time. Therefore, only three
states of the PF keys are available: unshlfted, shifted (Pseudo-shift) and CTRL
(control).
Understanding Your Status Line
The status line gives you Indications of the operating state of your terminal.
Symbols, characters, and numbers appear In the status line to Inform you of
conditions; for example, if your keyboard Is locked. If it Is In upper shift, or If the
system Is busy. Refer to Table 2-9 on page 2-16 for Information that can appear In
the status line, and what that information means.
Chapter 2. Using a 3270 Terminal to Connect to ASCII Hosts 2-15