|Java VM on RS-485 cards |
The RS485 networking cards
are used in various gaming machines playing the Jackpot game.
Jackpot control computer retrieves various information from
the participating gaming machines and then randomly selects
one gaming machine as a winner. Up to 32 RS485 cards can be
connected together on one network. The network is multi-drop
type with 9-bit communication protocol. Each network card is
assigned an unique address with a possibility to address all
cards on the network at the same time using the global
Basic configuration of the card consists of:
running at 7.3728MHz crystal clock
battery backed-up static RAM (expandable to 64KB)
digital input/output lines providing means for
gathering information from the gaming machine.
selecting the sound source
The field trials are being held at four
different casino locations in the Slovak Republic. Trials have
started at the end of June 1998 and are running since then.
Initially, trials started in one casino with about 15 gaming.
Since August 1998, trials have been extended into another
three casinos. Today, there are over 60 gaming machines
trialing the RS485 network cards running the Java VM for
68HC11 and executing control program written in Java.
RS485 network cards are integral part of the gaming machines.
Casino gaming machines are distributed in Slovakia by NovoNMN
s.r.o. Manufacturing and maintenance of the RS485 network
cards is provided by SOFT-GL
So far, these trials are showing that it is possible to
develop and maintain Java applications for the small 8-bit
embedded systems running specially optimized Java Virtual