JARLTECH JP8031 series, Operation Manual

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Appendix III
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A
Scan Code mode and ALT mode
JP-8031 supports two ways for keyboard wedge data
sending:
1. Scan Code Mode:
This is the standard code of PC keyboard designation, when you
press a key, there are two kind of code sending. One is "make
code", and another is "Break code"
when key-press-down, it makes a key data: "Make Code",
when key-press-up, it makes a key data called: " Break Code", this
mode is useful for normal application design.
Note:
In scan code mode, if you design a key "A", the software will
get data "A" or "a" that depends on the "Caps lock" status.
2. ALT mode code:
Sometimes, user cannot use "Scan Code" for special application
design, so, there's a "ALT mode" code for user easier to design
theirs application. The ALT-mode is for sending ASCII code, and
through PC keyboard. The method is use "ALT" key and the
numbers of PC keypad.
For example, Code number "A" in ASCII table is "65". So, you may
keep press "ALT" function key and then press number "6", and
number "5", after that, release "ALT" key, the "A" will appears on
the screen.
Note: In ALT mode, if you design a key "A", the software will only
get data "A".
Appendix IV