LYCOS RETRIEVER 
Serial: Serial Port
built 634 days ago
This book covers everything you'd ever want to know about serial ports and network projects. And it's not all theory. This is a very practical book, full of detailed examples - including Stamps and Visual Basic. Both books [Programming and Customizing the Basic Stamp Computer is the other] are professionally published and put together exceptionally well. Each contains detailed code listings, clear and concise diagrams, tables, and schematics...these books are "must-haves" for serious experimenters. - Jon Williams, Nuts & Volts.
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[C]om port") A connector on a computer to which you can attach a serial line connected to peripherals which communicate using a serial (bit-stream) protocol. The most common type of serial port is a 25-pin D-type connector carrying EIA-232 signals. Smaller connectors (e.g. 9-pin D-type) carrying a subset of EIA-232 are often used on personal computers. The serial port is usually connected to an integrated circuit called a UART which handles the conversion between serial and parallel data.
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The device driver for the serial port is the software that operates the serial port. It is now provided as a serial module. From kernel 2.2 on, this module will normally get loaded automatically if it's needed. In earlier kernels, you had to have kerneld running in order to do auto-load modules on demand. Otherwise the serial module needed to be explicitly listed in /etc/modules. Before modules became popular with Linux, the serial driver was usually built into the kernel (and sometimes still is). If it's built-in don't let the serial module load or else you will have two serial drivers running at the same time.
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The next generation MSLPhy SerDes technology is capable of meeting multiple standards in the storage markets including Serial ATA (SATA) and Serial Attached SCSI. Combined with this week's introduction of Silicon Image's SiI 4723, the industry's first storage processor to offer 3Gb/s port speeds with hardware RAID, this announcement extends Silicon Image's leadership in high-speed serial technology for storage applications.
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The first step to using interrupts is to work out which interrupt services your serial card. Table 13 shows the base addresses and IRQ's of some standard ports. IRQ's 3 and 4 are the two most commonly used. IRQ 5 and 7 are sometimes used.
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Most of the electronics of the serial port is found in a computer chip (or a part of a chip) known as a UART. For more details on UARTs see the section What Are UARTS? But you may want to finish this section first so that you will hopefully understand how the UART fits into the overall scheme of things.
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