NEC VERSA 2000 WINDOWS 98 - UPGRADE INFORMATION, Инструкция по обслуживанию и справочник

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PARALLEL INTERFACE
The system's parallel interface integrates National’s PC87334 chip. It uses a 25-pin D-
subconnector that is Enhanced Capabilities Port (ECP) equipped. The port is located on the
system's rear panel.
The user selects between three parallel interface modes using Auto Setup. These include
unidirectional, bidirectional or enhanced. Unidirectional mode sends data output from the
standard ISA port only. Bidirectional mode sends data using the standard ISA port or PS/2
technology. Enhanced mode enables high speed data transmission to occur using either the
unidirectional or bidirectional modes.
The parallel port address is 378h and the interrupt level is IRQ07. Pin locations for the
parallel interface are listed in Appendix A.
SERIAL INTERFACE
The RS-232C serial port is a 9-pin connector on the system’s rear panel. The serial port
consists of a 16550 compatible serial port controller with a program.
able baud rate within 50/56000 bps. The serial port connects an RS-232C device or an
external modem. The serial port address is 3F8h and the interrupt level is IRQ04.
NEC VERSA 2000 SERIES CHIP SET
Refer to Table Section 2-5 for a quick summary of the chip types used in the system. See
the Abbreviations section at the beginning of this manual for a translation of chip
technologies.
Table Section 2-5
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Versa 2000 Series Chip Types and Technologies
Chip Manufacturer Description Technology
P24C Intel 75 MHz CPU 208-pin SQFP
PT86C786 or
Sequoia-1 PT86C768A2 Pico Power System Logic 176-pin TQFP
PT86C718 Pico Power IDE Interface, Peripheral
Controller, Interrupt
Multiplexer 176-pin TQFP
N28F020-150 Intel 256k x 8 Flash ROM 32-pin PLCC
C&T65545B1-5 Chips &
Technologies
VGA Controller 208-pin QFP
PC8733 National
Semiconductor
Diskette Controller, IDE,
Parallel Interface 100-pin FQFP
M5M44260ATP-7S Mitsubishi Keyboard Controller
40-pin TSOP
CL-PD6720 Cirrus Logic PCMCIA Controller 208-pin FQFP