NCR 5953 manual NCR Proprietary HID Usages, Keymatrixusage

	Chapter 4: Programming 4-3
Table 1: NCR Proprietary HID Usages
Usage	Hexadecimal Value
HID_USAGE_PAGE_NCR_MISC 0xFF8F
KEYLOCK	0x01
KEYBOARD_TONE	0x02
KEYBOARD_MAP	0x03
KEY_CLICK_INFO	0x11
ERROR_TONE	0x12
TONE FREQUENCY	0x21
TONE DURATION	0x22
TONE VOLUME	0x23
KEY_MATRIX_USAGE	0x31

The report descriptors as emitted by the HID device should be consulted as the authority for the format of the reports. Software should access fields using report descriptor-based techniques and should not assume that all revisions of the product use identical report descriptors. The following provides interpretation information for these reports.

Keylock hardware HID interface: The keylock reports its positions as HID buttons. The positions are assigned as follows:

•Button 1 = Ex

•Button 2 = L

•Button 3 = R

•Button 4 = S.

Tone hardware interface: The ErrorTone usage collects a tone output report that sounds an immediate tone. The KeyClick usage collects a tone output report that sets the sound made for a key click. The units for Duration are milliseconds. The volume is a value between Logical_Minimum (silent) and Logical_Maximum (greatest volume). The tone is an index from Table 2: Note Numbers and Frequencies.