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Chapter 2. System board features 11
These speakers must be powered with a built in amplifier. In general, any
powered speakers designed for use with personal computers can be used with
the audio adapter. These speakers are available with a wide range of features
and power outputs.
• Line In port for connecting musical devices, such as a portable CD-ROM player
or stereo.
• Microphone for connecting a microphone.
Integrated peripheral controller
Control of the integrated input/output (I/O) and diskette drive controllers is
provided by a single module, the integrated peripheral controller (SMC FDC 87B813).
This module, which supports Plug and Play technology, controls the following
features:
• Diskette drive interface
•Serial port
• Parallel port
• Keyboard and mouse ports
Diskette Drive Interface
PC 300GL and PC 300PL personal computers have four drive bays for installing
internal devices. The following is a list of devices that the diskette drive subsystem
supports:
• 1.44 MB, 3.5 inch diskette drive
• 1.44 MB, 3.5 inch, 3-mode drive for Japan (no BIOS support for 3-mode drive)
• 1.2 MB, 5.25 inch diskette
• 1 Mbps, 500 Kbps, or 250 Kbps internal tape drive
One connector is provided on the system board for diskette drive support. For
information on the connector pin assignments, see “Diskette drive connector” on page
43.
Serial ports
Two universal asynchronous receiver/transmitter (UART) serial ports are integrated
into the system board. The two serial ports include 16-byte data, first-in first-out
(FIFO) buffers and have programmable baud rate generators. The serial ports are
NS16450 and PC16550A compatible.
For information on the connector pin assignments, see “Serial port connector” on
page 45.
Note: Current loop interface is not supported.