IBM PC 300GL manual Integrated peripheral controller, Diskette Drive Interface, Serial ports

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.

Chapter 2. System board features 11