POSIFLEX Business Machines Programming Utility 1 Setup, KB-6600U Keyboard, Hardware Limitation

B.PROGRAMMING UTILITY 1 SETUP

PC or POS SYSTEM PC or POS SYSTEM

PS/2 KB PORT

KB-6600

PC or PS2 KEYBOARD

KB-6600

USB PORT

USB or PS2

KB-6600U KEYBOARD

KB-6600U

Fig. 5 - 1 Preparations

2 HARDWARE LIMITATION

In case of “multiple combination key” application which means pressing three or more keys at the same time to obtain certain data output from the keyboard, there could be some limitations inherent from the nature of keyboard structure. The CPU of keyboard detects the contact between the “horizontal” and “vertical” lines for each key press, recognizes which key is pressed and sends correspondent data to the host computer. When there are many keys pressed at the same time, and the pattern of the contacts coincides with some special relationship, there are chances that the CPU of keyboard be confused about exactly which keys are pressed. The user may change the locations of the key-definition to prevent this once such confusion happens.

3 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 in “KBM.EXE”, 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 KB-6600 or KB-6600U receives an “enquiry” command through PS/2 KB port or USB port that is generated by the Application Program (AP).

Part 9