Why do VP machines take naps?

I seem to remember a "Trapper Keeper" was some sort of notebook that my daughter used in high school. All the kids had them. This was in the mid-'80's.
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Originally posted by: KayPea
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Originally posted by: knagl
In the event of a power outage


I was at Holy Cow years ago (obviously) when there was a power outage that lasted a good hour or so. When the power came back on the machines were exactly as they were before it went out. All the credits were present and even in the middle of the same hand as before the power went out. For once. instead of having their head down to their machine, people sat around, drank beer, and socialized just like at bars in other parts of the country.


I was living in Vegas when this happened. I was in North Town at the time getting ready to watch a race from Del Mar where a horse named Cigar was going for a record amount of wins in a row......he lost. Anyway, the lights went off and it was a while before power went back on. We left Poker Palace and went to the Sahara which was out normal hang out. We sat down to play at the bar where they used to have entertainment at night. A couple we knew were playing at the end of the bar, and all of a sudden his machine started paying out even though he hadn't hit anything. First time I ever saw a runaway machine. Bartender finally spotted it and told the guy to stop collecting. Those were the "coin-in" days, and the machine was spitting out quarters until it didn't have any left. The guy was filling up buckets and giving them to his GF to cash in while the bartender was away calling up someone. They wound up giving the guy some buffet tickets for his "honesty"....yeah right!
Aaah - the Sahara buffet.

I think free passes to that isn't a reward - it's a PENALTY!!!!

Even during the old days - that buffet sucked.

Still, sad to see the Sahara close, though...
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Originally posted by: KayPea
When the power came back on the machines were exactly as they were before it went out. All the credits were present and even in the middle of the same hand as before the power went out.

Yep, that's exactly what they're supposed to do. I think the writing to the EEPROM is almost a backup to a backup, as I've never seen a machine not pick up from where it left off after a power outage/reboot.

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Originally posted by: knagl
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Originally posted by: KayPea
When the power came back on the machines were exactly as they were before it went out. All the credits were present and even in the middle of the same hand as before the power went out.

Yep, that's exactly what they're supposed to do. I think the writing to the EEPROM is almost a backup to a backup, as I've never seen a machine not pick up from where it left off after a power outage/reboot.


Backup to an EEPROM? You do know that an EEPROM is read only and any information has to be "burned" into it. This would take an on board EEPROM burner which was pretty much unheard of. They are not like a normal memory chip.

Most likely is a dump of the cache every x number of hands. You can copy the information onto a non volatile memory chip as you go and then do a dump every so often. If the power goes out, its no big deal as its locked away powered by the CMOS battery.



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Originally posted by: chefantwon
Backup to an EEPROM? You do know that an EEPROM is read only and any information has to be "burned" into it. This would take an on board EEPROM burner which was pretty much unheard of. They are not like a normal memory chip.

You're thinking of an EPROM, not an EEPROM (notice the extra "E"?).

An EPROM (Erasable Programmable Read Only Memory) works as you described -- it is read-only and in order to re-program it, the chip must be erased (if equiped with a window) with UV light, and then re-burned with an EPROM programmer ("burner").

An EEPROM (Electrically Erasable Programmable Read Only Memory) can be erased without the use of UV light with the correct application of voltage to the chip. Here's a quote from the Wikipedia entry for EEPROM:
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EEPROM 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 generated externally or internally in the case of modern EEPROMs. EPROM usually must be removed from the device for erasing and programming, whereas EEPROMs can be programmed and erased in circuit.


My S+, PE+ and Game King machines all have EEPROMs on the motherboards (which the main processor boards seat into).
I stand corrected.
What a difference an 'E' makes.
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Originally posted by: knagl
Every 100 deals (same with many slot machines, too, although they're typically faster about it) the game writes accouting data to the EEPROM -- by today's computer standards, it's a slow process. In the event of a power outage or other malfunction, the machine will have good enough statistical accounting data to be used by the casinos and gaming officials.

Because of how relatively slow it is to write to the EEPROM, we notice the little "pause" every 100 deals/spins.


Is this fact? Every 100 hands? So, I can count it next time I play.
Im surprised no one has brought this up yet: But it is commonly known that these machines are programmmed to pause exactly every 100 hands to give the master advantage players who manage 1827 hands per minute a chance to take a sip of water. And in the case of the very super duper advantage players who can manage the super feat of 2649 hands a minute this pause allows them to dart off to the rest room and even wash their hands and return to catch the very next digital interaction of the RNG. This by the way is the only true evidence of rigged VP machines and it is all done to accommodate the super APers.
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