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kb(7M) STREAMS Modules SunOS 5.5

Controlled Used when a key is depressed and the Control key is being

held down (regardless of whether a Shift key or the Alt

Graph is being held down, or whether Caps Lock or Num

Lock is in effect).

Key Up Used when a key is released.

Each key on the keyboard has a “key station” code which is a number from 0 to 127. This

number is used as an index into the translation table that is currently in effect. If the

corresponding entry in that translation table is a value from 0 to 255, this value is treated

as an ISO 8859/1 character, and that character is the result of the translation.

If the entry is a value above 255, it is a “special” entry. Special entry values are classiﬁed

according to the value of the high-order bits. The high-order value for each class is

deﬁned as a constant, as shown in the list below. The value of the low-order bits, when

added to this constant, distinguishesbetween keys within each class:

SHIFTKEYS 0x100 A shift key. The value of the particular shift key is added to deter-

mine which shift mask to apply:

CAPSLOCK 0 “Caps Lock” key.

SHIFTLOCK 1 “Shift Lock” key.

LEFTSHIFT 2 Left-hand “Shift” key.

RIGHTSHIFT 3 Right-hand “Shift” key.

LEFTCTRL 4 Left-hand (or only) “Control” key.

RIGHTCTRL 5 Right-hand “Control” key.

ALTGRAPH 9 “Alt Graph” key.

ALT 10 “Alternate” or “Alt” key.

NUMLOCK 11 “Num Lock” key.

BUCKYBITS 0x200 Used to toggle mode-key-up/down status without altering the

value of an accompanyingISO 8859/1 character. The actual bit-

position value, minus 7, is added.

METABIT 0 The “Meta” key was pressed along with the

key. This is the only user-accessible bucky

bit. It is ORed in as the 0x80 bit; since this

bit is a legitimate bit in a character, the only

way to distinguish between, for example,

0xA0 as META+0x20 and 0xA0 as an 8-bit

character is to watch for “META key up”

and “META key down” events and keep

track of whether theMETA key was down.

SYSTEMBIT 1 The “System” key was pressed. This is a

place holder to indicate which key is the

system-abort key.

7M-172 modiﬁed 27 Jan 1994

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