Lenovo PC 300PL Techical Information Manual - Page 18

Super input/output controller, Diskette drive interface, Serialports, Parallelport

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Chapter 2. System board features Microphone for connecting a microphone. Super input/output controller Control of the integrated input/output (I/O) and diskette drive controllers is provided by a single module. This module, which supports Plug and Play, controls the following features: Diskette drive interface Serial port Parallel port Keyboard and mouse ports General-purpose I/O ports Diskette drive interface The PC 300PL Personal Computer has 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 drive 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 31. Serial ports Two universal asynchronous receiver/transmitter (UART) serial ports are integrated into the system board. The 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 34. Note: Current loop interface is not supported. The following figure shows the serial port assignments in the configuration. Figure 4. Serial port assignments Port assignment Serial 1 Serial 2 Serial 3 Serial 4 Address range (hex) 03F8-03FF 02F8-02FF 03E8-03FF 02E8-02FF IRQ level IRQ4 IRQ3 IRQ4 IRQ3 The default setting for the serial port is COM1. Parallel port Integrated in the system board is support for extended capabilities port (ECP), enhanced parallel port (EPP), and standard parallel port (SPP) modes. The modes of operation are selected through the Configuration/Setup Utility program with the default mode set to SPP. The ECP and EPP modes are compliant with IEEE 1284. The following figure shows the parallel port assignments used in the configuration. 10 Technical Information Manual

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Chapter 2.
System board features
±
Microphone
for connecting a microphone.
Super input/output controller
Control of the integrated input/output (I/O) and diskette drive controllers is provided by a single module.
This module, which supports Plug and Play, controls the following features:
±
Diskette drive interface
±
Serial port
±
Parallel port
±
Keyboard and mouse ports
±
General-purpose I/O ports
Diskette drive interface
The PC 300PL Personal Computer has 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 drive
±
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
31.
Serial ports
Two universal asynchronous receiver/transmitter (UART) serial ports are integrated into the system
board.
The 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
34.
Note:
Current loop interface is not supported.
The following figure shows the serial port assignments in the configuration.
The default setting for the serial port is COM1.
Parallel port
Integrated in the system board is support for extended capabilities port (ECP), enhanced parallel port
(EPP), and standard parallel port (SPP) modes.
The modes of operation are selected through the
Configuration/Setup Utility program with the default mode set to SPP.
The ECP and EPP modes are
compliant with IEEE 1284.
The following figure shows the parallel port assignments used in the configuration.
Figure 4. Serial port assignments
Port assignment
Address range (hex)
IRQ level
Serial 1
03F8–03FF
IRQ4
Serial 2
02F8–02FF
IRQ3
Serial 3
03E8–03FF
IRQ4
Serial 4
02E8–02FF
IRQ3
10
Technical Information Manual