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5 - 1 - 2
TM
CHAP.
5
Fig. 5 - 1 - 1 Preparations
ANSWER BACK CODE
Programming the answer back codes of the 6 position electronic key-lock is
also very easy as they are included in the keyboard programming with the locations
coded as “KLP”, “KL0”, “KL1”, “KL2”, “KL3” and “KL4” in the key-layout map of
page L1. These answer back codes will be issued by the programmable keyboard to
PC whenever the 6 position electronic key is switched to a new position (there will be
a time delay as determined in the configuration of the keyboard programming utility
and is adjustable by “r” and “t” key presses, this time delay is useful to give only the
answer back code of the last position of control key when it is turned across multiple
positions) or when the keyboard receives an “enquiry” code (E7h) from the PC or the
PST system. Here are some examples of sending this “enquiry” code in different
languages:
Language Syntax
C outp (0x60, 0xE7)
BASIC out &H60, &H0E7
DEBUG o 60 E7
PC or PST SYSTEM
PROGRAMMABLE
KEYBOARD
PC or PS2 KEYBOARD
EXT. KB PORT