IBM 3164 ASCII Manual page 124

80. Keyboard Unlock Command
ESC; (outbound)
This command is used to unlock the keyboard after it is locked by the Keyboard Lock command.
The key locked condition is cleared and the indicator KEYS LOCKED disappears from the screen.
If the keyboard is already unlocked. there is no effect.
81. Load Alternate Character Command
ESC space
=
Lch Lcl (Rp)Dp (Rp)Dp ---- ESC
=
(outbound)
L--J L--...1
Parameter: Lch:
Lcl:
Rp:
cell(s) cell(s)
2X
l
2Y
~-
where XY is a line code
4X or 5X is the number of cells to be repeated
40 is repeat once (defau It)
41 is repeat twice
42 is repeat three times
5F is repeat 32 times
Dp: 6X where X is a 4-dot cell
Refer to the section of alternate characters later on in this chapter.
82. Select Character Set GO/G1 Commands/Responses
ESC < Pa (Select Character Set GO) (outbound or inbound)
ESC> Pa (Select Character Set G1) (outbound. inbound or from the keyboard)
Parameter: Pa
@:
US ASCII Characters
A: Special Graphics
C: Alternate Character
These commands are used to set the character set to the GO or G 1 space. The G 1 space can be
accessed with SI. and the G1 space with SO.
These responses are used in the inbound data stream. whenever the character set change is
required.
83. Reset to Initial State (RIS) Command
ESC space S (outbound)
When the display station receives this command. it performs the Power-an-Reset (PaR)
sequence. It cannot receive the data from the host until the paR sequence is completed. It takes
about 500 milliseconds.
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