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5 - 2
Fig. 5 - 1 Preparations
1. 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