User guide

Software
This chapter provides a brief overview of the operating system and a
series of programs developed by Wincor Nixdorf GmbH to enable your
BEETLE /M to operate efficiently. More detailed information can be
found in the individual documents for these programs.
Operating system
The BEETLE /M runs under the MS-DOS operating system that was
specially expanded for POS applications.
This makes it possible, for example, to display all system messages on
the cashier display. These messages are appropriately adapted to the
format of the cashier display.
Retail device interface
The retail device interface (RDI) is a uniform C programming interface
for the BEETLE /M.
This interface provides the application programmer with a simple
means of programming retail-specific applications and devices.
GB - 57