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Eprom For Slot Machine Software
Recently one of our blog readers raised this question that there are some errors when buying a used slot machine. Though his query was related to his IGT Double Diamond model 96435800 reel slot machine which he had bought but here we are catering to some of the most common errors buyers face when they buy a real slot machine specially a refurbished ones. You can try to fix these errors by doing the following actions as given against each error. Also there are many superb videos online that teach you how to fix these errors.
EEPROM Device Error
EEPROM (electrically erasable programmable read-only memory) is user-modifiable read-only memory (ROM) that can be erased and reprogrammed (written to) repeatedly through the application of higher than normal electrical voltage. Unlike EPROM chips, EEPROMs do not need to be removed from the computer to be modified. However, an EEPROM chip has to be erased and reprogrammed in its entirety, not selectively. It also has a limited life – that is, the number of times it can be reprogrammed is limited to tens or hundreds of thousands of times. In an EEPROM that is frequently reprogrammed while the computer is in use, the life of the EEPROM can be an important design consideration.
A special form of EEPROM is flash memory, which uses normal PC voltages for erasure and reprogramming.
Here is the video how to fix this error
Error on door of slot machine
Many times when the display on the door indicates an error condition, open and close the door to reset the game and clear the error. Open the main door which clears the current game information and a “0” appears in the Coins Played window. Closing the door resets the game and the reels will spin and stop in their last valid position. The error code should clear and the digital display returns to normal game play.
Error Code 12 Battery Voltage
To fix this error turn power off and then turn power on if the battery voltage has dropped below 2.9 V. Also replace ASAP due to possible RAM (Memory) corruption. Open / close door to clear and also Replace 3.6 V Lithium battery on CPU board.
Coin Errors
For coin errors see that comparitor is seated in all four acceptor clips and that acceptor does not have coin(s) jammed or the coin optics below comparitor is not blocked You can ensure toggle power switch is in activated position if installed. https://jeanslucky.netlify.app/casino-games-with-bonus-rounds-for-free.html.
Coin Out Tilt Hopper
Check for and clear any jammed coins in the coin out channel. Also see that the coins are not jammed behind hopper knife or see that the coin out optic sensor is not blocked by dust. If so you can replace hopper coin out optic.
Error in Extra Coin Out Hopper
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To fix this see that the hopper motor brake functions properly. Check the coin wiper/ knife for jams and if so adjust them if necessary.
Hopper Empty Error
This is the most common error that new slot machine owners will have because the cash out button was pushed and the number of coins in the hopper is less than the total credits to be paid out. You can open the main door and check the hopper for coin level (your hopper will not dispense all of the coins), refill and close the main door. You may have to do this several times for all of the credits to be paid out.
Reel Tilt Errors
You will find that there are reel tilt errors and for this see that whether the designated reel is misaligned or malfunctioning. Also check if the reel is not unplugged. You can switch connectors from one reel to another, determine if error follows change of connectors. Try replacing reel assembly or optics if error stays with bad reel. Also clear Ram and see if it works again.
Error Codes and Fixes
During the process of clearing error codes, you may encounter multiple 6x series errors. Here are few common ones and their fixes
CMOS RAM Error
This means Bad (or cleared) CMOS RAM data You can Press test button 3 seconds Error code 61-1 should now be displayed. Now close door, turn and release reset key once. Same for game data reset.
Bad Game EPROM or Data EPROM Error
Check circuit board and replace Game EPROM. For Data EPROM error check circuit board and replace Reel EPROM
Bad EPROM Device or Bad EPROM Data or Game Type Mismatch
Press self test switch for 3 seconds If error will not clear replace EPROM Also if the processor could not read or write to the named chip Press test button for 3 seconds Error code clears from display.
Most of the errors can be resolved with little help but many need technical knowledge. Remember that if you are on a warranty or not the place or online site where you purchased a used slot machine is there to assist you with trouble shooting and repairs. They can guide you over the phone or send some mechanical and technical person to do so.
Payout table
The pay table shows the player what combinations pay out and how much.
Winning lines
Most machines have multiple winning lines on the reels, so options are given for how many lines the player wants to bet. Each line is equal to one bet, so on a five-cent machine, betting on five lines would equate to betting 25 cents.
Coin bin
Though many machines print redeemable tickets, machines that pay out in coins have a large bin to catch them.
Credit meter
A credit meter keeps track of how much credit the player currently has as well as winnings when the reels are spun.
Eprom Slot Machine
Credits are often used instead of showing actual cash amounts because, to the player, losing credits may not seem as negative as losing money.
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Arm or button
Once the player has selected how many lines they want to bet, pulling the arm or pressing the bet button locks the settings, selects a random number, and spins the reels.
RNG
The RNG continuously generates thousands of numbers per second while the machine is on.
Some RNGs may use a device that collects thermal noise and converts it into electrical signals to help generate the numbers, as computers alone are only able to generate pseudo-random numbers.
EPROM
The EPROM (Erasable Programmable Read-only Memory) controls the weighting of the machine to make sure the desired payout percentage is reached.
(See “Odds & Weighting' section below).
Bet button
When the bet button is pressed, the number generated by the RNG at that exact moment is selected and used. How to create facebook page for online casino.
Reels
Reels are for show, and by the time they’re spinning the machine already knows what the outcome will be. Spinning and stopping reels in sequence helps build suspense and excitement for the player, keeping them more interested.
Stops
Each reel usually includes 20 to 30 stops, which are the symbols and blank spaces on the reel.
Odds & Weighting
Over many random play sessions, odds are predictable. By adjusting payouts for winning spins, casinos observe legal requirements while delivering an entertaining experience.
Payouts
Odds are predictable over time,
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so adjusting payouts per possible winning spins
yields predictable results over many random play sessions
Required legal payout percentage
Many states have laws that require certain payout percentages. For example, a machine that returns 85 or 90% of the cash it receives over time would still give the casino a 10% - 15% cut.
Weighting
The programmable EPROM allows weighting to fine-tune the play experience.
For example, if a reel has 10 blank spots, as long as that quota is met, it doesn't matter which blank spots are used. The machine could be programmed to land on blank spots around jackpots to give the player the impression of a 'near win.'
Stacking the odds:
multi-reel machines
On a multi-reel machine, the odds of winning decrease exponentially. For example, taking the single reel example from above and multiplying it to 3 reels (all with identical symbols as the first), the chances of a winning combination (3 of the jackpot symbol instead of 1) drop from 1/20 chance to 1/8000 chance.
Anti-tamper
Slot machines are designed to be tamper proof to both the players and the casino.
Cabinet & screen
The cabinet and screen act as a faraday cage to disperse electricity and ground electrical signals, preventing outside electrical signals from interfering with the machine’s processes. The screen is coated in a clear, electrically conductive chemical, and connects to the metal cabinet to allow conductivity between the two.
Coin comparator
The coin comparator accepts or rejects coins that are put into the machine. It compares incoming coins against a coin previously placed in the comparator (e.g. if a nickel is in the comparator, then the machine would only accept nickels).
EPROM
The EPROM is programmed and tested in factory, then placed in the machine with a tamper evident sticker over it. This style of chip is reprogrammable using ultraviolet light and must be removed from the machine to do so, which is allowed only when a gaming authority is present.
Coin dispenser
Coin dispensers use a light sensor to count the number of coins dispensed.
Reels
Reels have sensors that detect extra movement, so trying to move reels manually causes an error to display on the LCD screen and any winnings are negated.
References
- (2017). Retrieved 7 January 2017, from https://www.reddit.com/r/IAmA/comments/clins/my_job_is_writing_software_for_slot_machines_and/
- Slots Random Number Generator - Hit Frequency vs Payout Ratio. (2017). Casino News Daily. Retrieved 7 January 2017, from http://www.casinonewsdaily.com/slots-guide/random-number-generator-hit-frequency-vs-payout-ratio/
- CC-40 A Coin Comparitor - YouTube. (2017). YouTube. Retrieved 7 January 2017, from https://youtu.be/k9ybYjS8jOI
- How Slot Machines Work. (2017). HowStuffWorks. Retrieved 7 January 2017, from http://entertainment.howstuffworks.com/slot-machine.htm
- Patent US4448419 - Electronic gaming device utilizing a random number generator for selecting the reel stop positions. (2017). Google Books. Retrieved 7 January 2017, from https://www.google.com/patents/US4448419
- How It’s Made Slot machines. (2017). YouTube. Retrieved 7 January 2017, from https://youtu.be/wjBSXUKn4Qw
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