L3 Systems KeyAT, Руководство пользователя

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KeyAT Keyboard Port Adapter
L3 Systems 9 5/19/2007
Data Mode Commands
The four mode commands set the way data is interpreted by
the KeyAT. A mode is set until another mode is given or until
a power failure occurs.
~C Character Mode
- is the default mode of operation.
When this mode is set, any ASCII character except ~
(tilde, hex 7E), ^ (caret, hex 5E), and CR (return, hex 0D)
is converted to the scan codes for that character. Each
ASCII character will be sent to the keyboard with the
corresponding “make” and “release” codes. Allow enough
time for the codes to be sent through to the computer, as
an ASCII code can require up to 10 keyboard codes to
execute.
Control codes may be sent by a combination of a ^ (caret,
hex 5E), and the corresponding letter. For example, a
control C (Hex 03) is ^C.
~H Hex ASCII Mode
- Data is interpreted as hexadecimal
encoded ASCII. For example, to send the computer the
character 'A', you would need to send its hexadecimal
ASCII value (Hex 41) as two ASCII digits, 4 and 1.
~S Scan Code Mode
- In this mode, data is translated to the
corresponding keyboard scan codes. For an ASCII
transfer, each pair of ASCII encoded characters is
interpreted as a DOS scan code. For a binary transfer,
each 8-bit character is interpreted as a DOS scan code.
DOS assigns each key a DOS scan code. Note that all
DOS scan codes are sent complete with make and break
sequences.
~K Key Code Mode
- In this mode, codes are sent directly to
the computer without interpretation. For an ASCII
transfer, each pair of ASCII encoded characters are
interpreted as one keyboard code. For a binary transfer,
each 8-bit character is interpreted as a keyboard code.