Lenovo NetVista Technical information manual for NetVista 6269, 6568, 6569, 65 - Page 19

Parallel port, Keyboard and mouse ports, Low pin-count bus, uses the LPC47M133 Super I/O chip.

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Table 1. Default serial port assignments Port assignment Serial 1 Serial 2 (A40 and A40p models only) Address range (hex) 03F8-03FF 02F8-02FF IRQ level IRQ 4 IRQ 3 Parallel port Integrated into the system board is support for ECP, 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 table shows the possible parallel port assignments used in the configuration. Table 2. Parallel port assignments Port assignment Address range (hex) IRQ level Parallel 1 Parallel 2 03BC-03BE 0378-037F IRQ 7 IRQ 7 Parallel 3 0278-027F IRQ 7 DMA 3 3 3 The default setting for the parallel port is Parallel 2 ECP mode. The system board has one connector for the parallel port. For information about the connector pin assignments, see "Parallel connector" on page 31. Keyboard and mouse ports The keyboard and mouse subsystem is controlled by a general purpose 8-bit microcontroller that is compatible with 8042AH and PC87911. The controller consists of 256 bytes of data memory and 2 KB of read-only memory (ROM). The controller has two logical devices: one controls the keyboard, and the other controls the mouse. The keyboard has two fixed I/O addresses and a fixed interrupt request (IRQ) line and can operate without the mouse. The mouse cannot operate without the keyboard because, although it has a fixed IRQ line, the mouse relies on assignments given in the system memory addresses or DMA channels. For information on the resource assignments, see Table 35 on page 49 and Table 36 on page 49. The system board has one connector for the keyboard port and one connector for the mouse port. For information on the connector pin assignments, see Table 36 on page 49. Low pin-count bus The low-pin-count (LPC) bus enables device connections to the Super I/O without industry standard architecture (ISA) or X-Bus. The NetVista A40 and A40p computer uses the LPC47M133 Super I/O chip. The NetVista A20 computer uses the Windbond 83627HF Super I/O chip. The chip includes the following: • Diskette drive controller • Keyboard and mouse controller • IEEE 1284 parallel port Chapter 2. System board features 9

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Chapter 2.
System board features
9
Parallel port
Integrated into the system board is support for ECP, 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 table shows the possible parallel port assignments used in the
configuration.
The default setting for the parallel port is Parallel 2 ECP mode.
The system board has one connector for the parallel port.
For information about the
connector pin assignments, see “Parallel connector” on page 31.
Keyboard and mouse ports
The keyboard and mouse subsystem is controlled by a general purpose 8-bit
microcontroller that is compatible with 8042AH and PC87911.
The controller consists
of 256 bytes of data memory and 2 KB of read-only memory (ROM).
The controller has two logical devices:
one controls the keyboard, and the other
controls the mouse.
The keyboard has two fixed I/O addresses and a fixed interrupt
request (IRQ) line and can operate without the mouse.
The mouse cannot operate
without the keyboard because, although it has a fixed IRQ line, the mouse relies on
assignments given in the system memory addresses or DMA channels.
For
information on the resource assignments, see Table 35 on page 49 and Table 36 on
page 49.
The system board has one connector for the keyboard port and one connector for the
mouse port.
For information on the connector pin assignments, see Table 36 on page
49.
Low pin-count
bus
The low-pin-count (LPC) bus enables device connections to the Super I/O without
industry standard architecture (ISA) or X-Bus.
The NetVista A40 and A40p computer
uses the LPC47M133 Super I/O chip.
The NetVista A20 computer uses the
Windbond 83627HF Super I/O chip.
The chip includes the following:
•
Diskette drive controller
•
Keyboard and mouse controller
•
IEEE 1284 parallel port
Table 1. Default serial port assignments
Port assignment
Address range (hex)
IRQ level
Serial 1
03F8–03FF
IRQ 4
Serial 2 (A40 and A40p models only)
02F8–02FF
IRQ 3
Table 2. Parallel
port assignments
Port assignment
Address range (hex)
IRQ level
DMA
Parallel 1
03BC–03BE
IRQ 7
3
Parallel 2
0378–037F
IRQ 7
3
Parallel 3
0278–027F
IRQ 7
3