Epson CW3S20A Bedienungsanleitung PDF herunterladen (Seite 132)

Note

Your computer is referred to as a 386SX computer. This

means that the micro processor can manipulate 32 bits of

data at a time over the 16 parallel data lines and address

over 16MB of memory.

Serial Ports

There are two basic kinds of general purpose I/O (Input/Output)

port. One kind is a “serial” port, where data bits are sent one

at a time along a single wire, in series. Additional wires are

used to send control signals between the transmitting and

receiving devices. These control signals allow the two

communicating devices to determine which of them will send

or receive the data, and when the first bit of a particular byte is

being sent, among other things.

Standardized “protocols” for these signals have been agreed

upon by the microcomputer industry so that the different

manufacturer’s machines can communicate with each other.

You will be prompted to insert the backup archiev diskettes

into the A drive, one at a time. It is very important that you

insert these diskettes in order. The BACKUP command

program codes each archive diskette with an identification

number, which is read by the RESTORE program. The use of

this i.d. number ensures that your files are reassembled

properly, and loaded into the correct subdirectories.

Your computer system uses the “RS-232C” asynchronous serial

communications interface. The serial port connectors are the

left-hand 9-pin “D-type” connector mounted on the system

motherboard.

Electrical information for the serial port is in Appendix A,

“Specifications.” For details on the serial port pin connections,

see Appendix C, “Connector Pinouts.”

Expanding Your System

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Epson CW3S20A Bedienungsanleitung Seite 132