Specifications

5.9.3.5 KEYBOARD OPERATION
The operator uses the ke~board to transmit encoded ke~in~ events to a
buffer in the workstation. A keyins event is transmitted when!
1. an~ key is newl~ pressed
2. an~ of a certain set of ke~s is depressed
3. certain keys are held down and are ~eneratin~
auto repeatkeYins events.
except as allowed above, the release of a key is not an event.
data is transmitted from and recieved by the keyboard at a rate of
4800 baud.
transmitted data is in sin~le byte format for a given
keY, upon receiving a reset command fron the VS100,
the keyboard will perform a power-up self test and then
transmit a 4 byte code to the VS100. The 4 bytes
transmitted at power-up are defined as follows!
first byte
second b~te
third b~te
fourth byte
firmware I.D.
hardware I.D.
error code or 0 error code can
indicate RAM error,ROM checksum
error or key down condition
indicates specific key down if any
The user must identify the keyboard to the VS100 ie. what natural
langua~e, ~erman,french etc.,either in the set-up mode or through
escape seQuences when switchin~ keycaps or keyboards.
5.9.3.6 N KEY ROLLOVER
The keyboard will transmit the last key down even though other keys are
not released. This will enable the workstation to exibit the N key
rollover feature when:
1. ·phantom key· possibilities do not exists.
2. The bell of the keyboard can be programmed for various volume levels
3. The keyclick indicator can be programmed to an ON or OFF condition.