What does ROM mean after digital currency

1.

TEDA coin (usdt) is a token launched by tether company, which is based on the stable value currency US dollar (USD). 1 usdt = 1 US dollar. Users can use usdt to exchange 1:1 with USD at any time

tether company strictly abides by the 1:1 reserve guarantee, that is, every usdt token issued, its bank account will have a capital guarantee of $1. Users can query funds on the tether platform to ensure transparency

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extended data:

the functions of usdt are as follows:

1. Avoiding the overall risk of decline

in currency trading, there are three common situations, taking LTC / BTC trading as an example:

after buying LTC with BTC, BTC and LTC are both rising, and you enjoy two profits

after buying LTC with BTC, BTC and LTC will rise and fall one by one. Your income depends on the rise and fall of the two currencies, which is bigger. Only if the increase of any one is greater than the decrease of the other, can we make money. Anyway, it's a loss. If the fluctuation is equal, there will be no profit or loss

after buying LTC with BTC, both currencies are falling in extreme market, so you need to bear two losses. This is often the most frustrating

but with usdt, when the currency price falls, you can immediately change the currency into usdt, so as to ensure that your assets will not shrink

The reverse operation of digital currency withdrawal is very simple. Usdt company says that investors can transfer US dollars to the bank account of tether company through swift or exchange usdt through bitfinex exchange

if you make a lot of profits and want to withdraw cash, you can first convert your currency into usdt, and then convert it into US dollars through tether or other platforms. Here you can find that if you complete the authentication of usdt company, you can trade directly on other currency trading platforms that do not need authentication, and you do not need to authenticate other platforms again

2.

In the digital currency market, the X after each coin represents an unknown probability of a growth value of each bitcoin; Digital currency is usually issued and managed by developers and accepted and used by members of a specific virtual community

The digital representation of value is not issued by the central bank or authority, and has nothing to do with fiat money, but because it is accepted by the public, it can be used as a means of payment, or it can be transferred, stored or traded electronically

At the present stage, digital currency is more like an investment proct, because there is no strong guarantee institution to maintain its price stability, and its value measurement function has not been shown, nor can it be used as a means of payment. As an investment proct, digital currency cannot develop without trading platform, operating company and investors

extended information:

features of digital currency:

low transaction cost: compared with traditional bank transfer, remittance and other methods, digital currency transaction does not need to pay fees to a third party, and the transaction cost is lower, especially compared with cross-border payment, Cross border payment to payment service providers costs more

fast transaction speed: the blockchain technology used in digital currency is decentralized, and it does not need any centralized institutions such as clearing center to process data, so the transaction processing speed is faster

high anonymity: in addition to the physical form of money intermediary participation can achieve point-to-point transactions, one of the advantages of digital currency compared with other electronic payment is that it supports remote point-to-point payment, it does not need any trusted third party mediation, and both parties can complete the transaction in a completely unfamiliar situation without mutual trust, which is higher anonymity

3. Intercommunication, can use these several currencies to purchase the corresponding currency in front!

4. In the final analysis, e-money is just conceptual money information. It is actually a special information composed of a group of data including the user's identity, password, amount, scope of use, etc., so it can also be called digital money; E-money is the virtualization of the value scale of real money and the function of payment means. It is a kind of money without monetary entity. Electronic currency is a kind of invisible currency based on highly developed electronic technology; It can be used to represent the currency value of various amounts in reality. With the transformation from paper-based economy to digital economy, e-cash will become the mainstream, which can be paid on the Internet or through other electronic communication methods. This kind of currency has no physical form and is the holder's financial credit.
whether electronic currency can be called currency depends on whether electronic currency can independently perform the function of currency. At present, e-money can play the role of payment and settlement, but e-money is only a quasi currency that may perform the function of currency.
e-money can be divided into two types: one is e-cash based on the Internet environment and keeps the binary data representing the value of money in the hard disk of the computer terminal; One is the electronic wallet that keeps the monetary value in the IC card and can be circulated without the bank payment system
therefore, from an economic point of view, the use of e-money can indeed rece the circulation of paper money

5. The teacher is very serious, ha ha, but don't ask questions in class. The next day, they will come out the courseware of the day before, which can be downloaded to learn. Generally speaking, they are a group of people who work hard.

6. Now there are several kinds of room, including cd-room, dvd-room, cd-room (RW). Dvd-room (RW) cd-room can only play CD and software. Dvd-room can play DVD. CD is compatible with CD because DVD compression ratio is higher than CD. RW means burn. A room with this function can burn corresponding discs, so dvd-room is most commonly used

7. Digital currency is a kind of data structure, which combines data blocks in chronological order. Digital currency can not be tampered or forged by means of cryptography

8. There is no ram digital currency
ram is a kind of memory, and memory is an important part of computer. According to its use, it can be divided into main memory (main memory for short) and auxiliary memory (auxiliary memory for short). Main memory is also called internal memory, and memory is divided into random access memory (RAM) and read only memory (ROM).

9. The naming of game ROM or ISO depends on different websites and different people. It's not necessary to care M4) [b1+1C]" I don't know the specific meaning of, but it seems that I have only seen it on EMU max, such as this: FIFA international soccer on MD - FIFA International Soccer (UE) (M4) [B1 + 1C]. Zip

according to my personal guess, the content of ROM has been modified unofficially in varying degrees to increase the fun of the game, However, I don't know what is actually modified...

the naming method for ROM of GBA and NDS is: 0025 - Super Mario advance (UE)

take the ISO naming method of PPX as an example...
for example:
[PS] [u] [RPG] final_ FANTASY8_ Final Fantasy 8_ BY_ Roy8734547
the order is [machine type] [language version] [game type] game English name_ Chinese name_ BY_ Uploader

game version:
C = Chinese version
e = European version
J = Japanese version
u = American version

the biggest difference between American version and European version is that most European versions can choose six languages before entering the game<

game type:

AAVG = action adventure game
representative work: Bio_ Hazard, Dino_ Crisis (dinosaur crisis)<

Act = action clearance game
representative works: Rockman, Tenchu

ARPG = Action Role Playing Game
representative work: Tales_ OF_ Destiny, Dragon_ Valor<

AVG = adventure game
masterpiece: clock_ Tower, Koudelka<

CAG = card game
Masterpieces: card Summoner<

col = collective game
masterpiece: none Most of these games are made by D-version merchants, which integrate several games without music or other things into a CD)

DJs = DJ simulation game
representative work: Beatmania_ APPEND_ CLUB_ Mix (rhythm DJ)<

DSG = dance game
masterpiece: Dance_ DANCE_ Revolution<

etc = other types of games
Masterpieces: bishibashi, Namco_ Museum (Namco Museum)<

FPS = first person shooting game
masterpiece: Medal_ OF_ Honor (Medal of honor)<

FTG = Fighting Game
representative works: Tekken (iron fist), steet_ Fighter (street bully)<

Mug = music game
masterpiece: Bus_ A_ Move (jump freely)

PUZ = puzzle game
representative work: mr.driller_ G (Mr. drill g)<

RAC = racing game
masterpiece: ridge_ RACER_ Type, Daytona_ USA (sleepwalking America)

RPG = role play
representative work: Final_ Fantasy, Dragon_ Quest (dragon fight)<

RTS = real time strategy game
masterpiece: Red_ Alert (Red Alert)<

SLG = simulation strategy game
representative works: sangokushi, front_ Mission (front line mission)<

SPG = sports game
masterpiece: Winning_ Eleven (11 winners)<

SRPG = strategic role playing game<

STG = shooting game
Masterpieces: gungriffon, sonic_ WINGS_ Special (wings of sound)<

TCG = nurture game
masterpiece: havest_ MOON_ BACK_ TO_ Nature (the story of pastures)<

tab = desktop game
representative work: Yu-Gi-Oh (game king);

10. Hello, according to my personal understanding, I will take 1602 character LCD as an example to make a brief introction. Please refer to the relevant information for the meaning of the above technical terms in other LCD screens. The following is for reference only:
character LCD can receive instructions and display relevant characters, which is controlled by the control chip on its back. The black one behind the LCD screen is just a lump. Most of 1602 in the market are based on HD44780 LCD chip, HD44780 has built-in DDRAM, cgrom and cgram, which are all memories As for what hcgrom is, I don't know)
first, let's talk about the functions of these three memories:
cgrom stores some standard character font codes, which are solidified in the control chip when the LCD screen is delivered,
users can't change the contents of the storage, they can only read and call, including standard ascii code, ASCII code and Japanese characters
and Greek characters
cgram is the control chip left to the user to store the font code designed by the user himself
DDRAM is a group of memories corresponding to the screen display area, and its function is a bit of transfer
for ease of understanding, we can make an example as follows:
the font information stored in cgrom and cgram is equivalent to the food in the kitchen. Cgrom is the ready-made cooked food in the kitchen, and cgram is the dishes made by users themselves. These foods can only be delivered to the dining table after being transferred through the tray; Similar font codes need to be read into the corresponding DDRAM first, and then the characters will be displayed in the corresponding position of the screen after the above transfer.

in addition, according to the answers of treny1982 students to the same questions in the network know, cgrom (Chinese font library), hcgrom (ASCII code word library) and cgram (custom font), display data RAM (DDRAM),
Character display RAM buffer (DDRAM)
1602 can only display characters, but not Chinese characters, so its cgrom is not the font of Chinese characters. There are dot matrix displays with Chinese character library in the market. Some of them have their own Chinese character library, which may be stored in cgrom as described by treny 1982
the difference between him and me should be that different LCDs use different control chips, so their memory function allocation is different. Therefore, the specific meaning of memory needs to refer to the technical manual of the LCD screen you said to use