EPSON Endeavor 4SX/25, 4DX/33, and 4DX2/50

pourer

hard disk

diskette

power

(SPEED) light

access light

drive

bWon

hay for hard disk. diskette, tape, CD-ROM, or other drive

110/220 VAC switch

option card slots

power

keyboard

serial serial

\

VGA

inlet

port

port 1 port 2

monitor

 

mouse

 

parallel

port

 

port

 

port

 

 

 

 

Computer Specifications

CPU and Memory

32-bit CPU 4SX/25: Intel® i486SX, 25 MHz microprocessor; can be replaced with optional 487SX/25 or ODP486-25 OverDriveT” processor

4DX/33: Intel i486DX, 33 MHz microprocessor; can be replaced with optional ODP486-33 OverDrive processor

4DX2/50: Intel i486DX2, 50 MHZ microprocessor

System speed High and low speeds available; high speed depends on CPU (25 MHz, 33 MHz, or

50 MHz), low speed is simulated 8 MHz speed; speed selection through keyboard command; 0 wait state memory access at highspeed

 

To select low speed, press the Ctrl, Alt,

 

and - keys simultaneously. To select

 

high speed, press the Ctrl, Alt, and + keys

 

simultaneously. (Use the - or + key on the

 

numeric keypad.)

Memory

4MB RAM standard on a SIMM;

 

expandable using 1MB, 4MB, or 16MB

 

SIMMs to 32MB (maximum); SIMMs must

 

be 36-bit, fast-page mode type with 70ns

 

(or faster) access speed

ROM

128KB system BIOS, video BIOS, and

 

SETUP code located in EPROM on main

 

system board

Video RAM

512KB or 1MB DRAM on main system

 

board; 512KB configuration expandable

 

to 1MB

Shadow RAM

Supports shadowing of system and video

 

BIOS ROM into RAM

Cache

8KB of internal cache (built into the

 

microprocessor)

Math

On 4DX/33 and 4DX2/50 systems, math

coprocessor

coprocessor built into the microprocessor;

 

optional 487 upgrade available for 4SX/25

 

system

Clock/calendar Real-time clock, calendar, and CMOS

 

RAM socketed on main system board with

 

built-in battery backup

Controllers

Video

Cirrus® VGA controller on main system

 

board; provides resolutions up to

 

1024 x 768

D i s k e t t e

Controller on main system board supports

 

up to two diskette drives or one diskette

 

drive and one tape drive

Hard disk

Interface on main system board supports

 

up to two IDE hard disk drives with

 

built-in controlIers

Interfaces

Monitor

VGA interface built into main system

 

board for analog or multifrequency VGA

 

monitor; 15-pin, D-shell connector

Parallel

One standard &bit parallel, uni- or bi-

 

directional interface built into main system

 

board; I/O address selectable through

 

SETUP; 25-pin, D-shell connector

Serial

Two RS-232C, programmable,

 

asynchronous interfaces built into main

 

system board; 9-pin, D-shell connectors

4/1/93

EPSON Endeavor-1