MagTek MINI MICR WEDGE - Manual (Page 22)

MINI MICR WEDGE with 3-Track MSR
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In addition to relocating the key, the user may require a two-position key.
On the keyboard, this is accomplished by placing a plastic cap over two adjacent keys. Hence,
when the key is pressed, two signals are sent to the PC or cash register. The one-key option is
referred to as single, and the two-key option is referred to as double.
The concepts of default, custom, single, and double are illustrated in Figure 4-2.
Every key-position on a keyboard is associated with a fixed number. This number is called scan
code. When a key is pressed, the keyboard transmits the corresponding scan code. Similarly, the
MICR Reader transmits data using scan codes, effectively emulating keys being pressed on the
keyboard.
When a custom option is required, the scan code information must be determined by the customer
or with the help of MagTek. The scan code must then be programmed into the MICR Reader, and
this can be accomplished at the factory or with Insta-Change checks provided by MagTek.
Note
The default scan codes are 5A (hex) for PC/AT and 1C (hex) for
PS/2.
Figure 4-2. Key Positions
Move Key to Location 16
5A
Original
(Default)
Position
Double
Key
16
New
(Custom)
Position
Single
Key