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デスクトップ Epson QX-10のPDF 操作マニュアルをオンラインで閲覧またはダウンロードできます。Epson QX-10 45 ページ。 Epson operations manual computer qx-10
Epson QX-10 にも：操作マニュアル (46 ページ)

A bit is a unit of computer information. Physically, it consists

of a microscopic electrical switch that can be closed or open,

representing the alternatives of yes or no, on or off, and so forth.

The word

is derived from the words binary

bit

need to wrestle with complicated computer theory to fully com-

prehend bits, but for our purposes all we need to know is that

groups of bits are called bytes. A byte is a group of 8 bits that func-

tions as a character or symbol that the computer can understand.

The 780C microprocessor is an 8-bit microprocessor.

The QX-10's microprocessor can combine bytes in a multitude

of ways. As an example, one byte can have a numerical value of

0 to 255. Suppose you tell the computer to store one byte that has

the value of the number 44 and another byte that has the value

of the number 56. If you then command the computer to add these

two bytes, it retrieves them from their respective storage slots and

creates a new byte with the value of 100, which it then stores in

memory.

It's through this sort of mathematical operation that the QX-10

gains its computing power. All of the various combinations of

bytes, and all of the combinations of bit patterns within each byte,

instruct the computer to perform deeds ranging from simple math

to reformatting blocks of text in a document.

QX-10 Memory

Unlike the human brain, the QX-10 has a limit to the amount

of information it can store in memory. On the other hand, peo-

ple sometimes have trouble recalling facts, but the QX-10's stored

data is always accessible on demand. You'll remember that infor-

mation is stored as bytes. A thousand and twenty-four (1024) bytes

is called a kilobyte. Your QX-10 has 256 kilobytes (256K).

Note: Although kilo means exactly 1000, it is used for convenience

to denote 1024 bytes; for instance, 256K is really 262, 144

bytes. The number 1024 is used since it is the closest number

to 1000 which is an exact power of 2 (1024 is 2 raised to the

10th power). Computers like numbers divisible by 2.

You would

digit.