Posiflex KB-6800 - Manual (Page 6)

Part 6
III. APPLICATION
A. KEYBOARD CONSTRUCTION
This keyboard is constructed of three parts on the top surface (ref. Fig. 4-1). A
6 position turning key switch area is at the upper right corner, a 13 x 6 matrix
of push key switches occupies most of the top surface and a slot near the right
edge is designed for the Magnetic Stripe Reader of the -M2, -M3, -MJ models.
In the rectangular area at upper right
corner there are one 6 position
electronic key switch and two LED’s.
The upper LED is for power-on
indicator and under power-on LED is
the MSR indicator (available in
KB-6800 with MSR only). The 6
position electronic key can be turned to
one of the following 6 positions: LP, L0, L1, L2, L3 and L4. It can only be
taken out from the switch at positions L0 and L1. The purpose of this
electronic key serves 3 folds: When the key is switched to (and extracted from)
position L0, the whole keyboard output will be blocked off by hardware to
work as a security measure. A programmable answer back code for the final
position of the 6 position electronic key will be sent by the keyboard to the
host computer whenever the key is switched to a new position for a
programmable delay time or when the host
computer sends a specific command to inquire the
keyboard. The position of the electronic key
determines which page of the key content table for
the push keys applies, while the definitions of the
same key within different pages can be programmed
so absolutely independent to provide instant menu
change over.
Fig. 4-1
PRG REG Z GT
LP Y N N N
L0 Y Y Y Y
L1 Y Y Y Y
L2 Y Y Y Y
L3 Y N Y Y
L4 N N N Y
Fig. 4-2
MSR slot
MSR indicator (for KB-6800 only) Power-on LED
6 position key switch
9 x 6 push keys