Product Information Guide

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EPSON NX

power (SPEED)

hard disk

diskette

power

light

access

light

drive

button

ROM

bay for hard disk, diskette, tape,

CD-ROM, or other drive

115mo

VAC switch

option card

slots

CPU and Memory

32-bit CPU

System speed

Memory

4DX2/66:

Intel

i486DX2,66

MHz

microprocessor; supports future Intel

OverDrive

processors

High, low, and automatic speeds

available; high speed is CPU-dependent

(66 MHz), low speed is simulated 8 MHz,

automatic speed switches from high to

low only for diskette drive access; speed

selection through SETUP, keyboard

command, or ESPEED program; 0 wait

state memory access at high speed

20MB standard (4MB DRAM soldered on

main system board and one 16MB SIMM);

expandable using lMB,

4MB,

16MB,

64MB

SlMMs

128MB

maximum on

main system board; SlMMs must be 70 ns,

36-bit, 72-pin, gold-leaded, fast-page mode

I-

Computer Specifications

Video RAM

Shadow RAM

Cache

VirtualCache

Math

coprocessor

Clock/calendar

Controllers

Video

DiSk&te

Hard disk

Interfaces

Monitor

Parallel

Serial

128KB ROM containing system BIOS and

video BIOS; 64KB ROM containing SETUP

code

2MB video RAM on main system board

Automatic shadowing of system and VGA

BIOS ROM into RAM; shadow RAM

address control selectable through SETUP

8KB of internal cache (built into the

microprocessor); cache testing and address

control selectable through SETUP

Epson proprietary

VirtualCache’”

feature

automatically creates a “virtual cache”

buffer the size of maximum system

memory

Built into the microprocessor

Real-time clock, calendar, and CMOS

RAM on main system board; separate

battery backup

Chips and Technologies

Wingine’”

P64200 VGA controller on main

system board; provides resolutions

of up to 1024 x 768 x 64K colors or

1120 x 832 x 64K colors, depending on

the available drivers

Controller on main system board supports

up to two diskette drives or one diskette

drive and one tape drive (DOS only)

Interface on main system board supports

up to two IDE hard disk drives with

built-in controllers

VGA interface built into main system

board for analog or multifrequency VGA

monitor; 15-pin, D-shell connector

One standard 8-bit parallel, bidirectional

interface built into main system board;

port assignment and I/O address

selectable through SETUP; 25-pin, D-shell

connector

Two RS-232C, programmable,

asynchronous interfaces built into main

system board; port assignment and I/O

addresses selectable through SETUP;

9-pin, D-shell

co~ectors

6/30/93

EPSON NX-1

Summary of content (8 pages)

PAGE 1
EPSON NX power (SPEED) light hard disk access light diskette drive ROM 128KB ROM containing system BIOS and video BIOS; 64KB ROM containing SETUP code Video RAM 2MB video RAM on main system board Shadow RAM Automatic shadowing of system and VGA BIOS ROM into RAM; shadow RAM address control selectable through SETUP Cache 8KB of internal cache (built into the microprocessor); cache testing and address control selectable through SETUP VirtualCache Epson proprietary VirtualCache’” feature automatic
PAGE 2
EPSON NX Keyboard ES/2 compatible keyboard interface built into main system board; keyboard speed, delay, and num lock settings selectable through SETUP; 6-pin, mini DIN connector Mouse I’S/2 compatible mouse interface built into main system board; 6-pin, mini DIN Other devices Half-height tape drive, CD-ROM drive, or other storage device; 51/4-inch form factor or 31&inch form factor with 5’!-inch mounting frames attached Keyboard Detachable; two-position height; 101 sculpted keys; numeric/cursor con
PAGE 3
EPSON NX Major Subassemblies J1549 option board riser card VGA feature connector J5J6 0 L q q vertii drive bay horizontal drive bays 6/30/93 EPSON NX-3
PAGE 4
EPSON NX Main System Board Diagram option board - risercad connector alternate VGA feature connector - FDD video DFtAM connector 1 HDD connector EPSON NX-4 6/30/93
PAGE 5
EPSON NX VGA Port Connector (CN2) Connector Pin Assignments Parallel Port Connector (CN5) pin 13 pin 1 Pin 5 pin 1 pin 10 pin6 pin 15 ptn 11 t-1 VGA Port Connector Pin Assignments I pin 14 pi;25 Parallel Port Connector Pin Assignments Pin 1 Signal strobe Pin Signal 10 ACK’ Pin Signal 19 Signal ground VGA Feature Connector (CN17) pin 1 19 IData *Active low kgic I 16 I Signal ground pin2 Serial Port Connectors (CN4 and CN8) Serial Port Connector Pin Assignments Pin 1 2 3 4 5 I Slgnai
PAGE 6
EPSON NX Hex address* 22El Hardware Interrupts 1 Asslgned device j GPIB (adapter 1) FO80 - F085 Epson reserved function F089 - FO8D Epson resewed function * Recommended addresses for installing devices Jumper Settings System l/O Address Map Hex address’ 000-OlF 020 - 021 022 - 024 040-043 080-081,084 070 - 071 (CMOS) 080-08F OAO-OAl OCO - ODF OF0 OF1 OF8 - OFF 1 lFO- lF8 200-207 278 - 27A 1280 - 2DF 2El 2E2 and 2E3 I2F8 - 2FF 300-31F 348-357 380-383 384-387 p-368 38C-38F 378 - 37A 380-38F 390-393 3A0
PAGE 7
EPSON NX Processor Chips Hard Disk Drive Types Support is provided for a future OverDrive processor. The table below lists types of hard disk drives you can use in the computer. Check this table and your hard disk manual to find the correct type number(s) for the hard disk drive(s) installed in the computer. You need to enter the type number(s) when you set the hard disk drive configuration in the SETUP program. SIMM lnstallation There are two SIMM sockets on the main system board.
PAGE 8
EPSON NX If the computer has an Epson 170MB or 240MB hard disk drive, select the appropriate type number from the table below. Epson Hard Disk Drive Types Type4 number 28 34 Epson hard disk drive 17OMB 24OMB lnstallation/Support Tips Power The computer has an input voltage selection switch on the back panel to select between 115 VAC, for USA and Canadian use, and 230 VAC, for use in other countries.