Epson EL 4S/33 Specifications download pdf

Epson EL 4S/33

System speed

hard disk or diskette

drive bay

reset

button

harddisk

‘ght

diskette drive

power

button

access light

monitor cable

Video RAM

option

Card

slots

“AA

Memory

ROM

Shadow RAM

Math

coprocessor

Clock/calendar

Controllers

Video

AC inlet AC outlet

I I

COM1 COM2 Parallel

Game

Diskette

Hard disk

Computer Specifications

CPU and Memory

32-bit CPU

Cyrix Cx486SLC, 33 MHz microprocessor

with 16-bit data bus

Internal cache

1KB built into microprocessor

9/93

Interfaces

Monitor

Parallel

High and low speeds available; high

speed is 33 MHz, low speed is 8 MHz;

speed selection through SETUP program

and keyboard commands; 0 or 1 wait state

memory access selectable through SETUP

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.)

2MB or 4MB RAM standard on SIMMs;

expandable using 256KB, 1MB, or 4MB

SIMMs to 16MB (maximum); SIMMs must

be 30-pin, fast-page mode type with 70ns

(or faster) access speed

Phoenix BIOS A386 V1.03; 64KB system

BIOS, video BIOS, and SETUP code

located in EPROM on main system board

256KB DRAM on main system board,

expandable to 512KB or 1MB using 70ns

or 80ns 44256 DIP chips

32KB or 64KB, 0 or 1 wait state access

speed; system ROM BIOS and video ROM

can be copied into RAM

Socket for Cyrix Cx83S87-33 math

coprocessor

Real-time clock, calendar, and CMOS

RAM socketed on main system board with

built-in battery backup

Trident VGA controller on main system

board; provides standard VGA

resolutions with 256KB memory and

extended VGA resolutions up to

1024 x 768 in 16 colors with 512KB

memory and 256 colors with 1MB memory

Controller on main system board supports

up to two diskette drives, maximum

Interface on main system board supports

up to two IDE hard disk drives,

maximum, with built-in controllers on the

hard disk drive itself

VGA interface built into main system

board for analog or multifrequency VGA

monitor; 15-pin, D-shell connector

One standard B-bit parallel, unidirectional

interface built into main system board;

25-pin, D-shell connector

Epson EL 4S/33-1

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Summary of Contents

Page 1 - Computer Specifications

Epson EL 4S/33System speedhard disk or diskettedrive bayresetbuttonharddisk ‘ghtIdiskette drivepowerbuttonaccess lightmonitor cableVideo RAMoptionCard

Page 2

Epson EL 4S/33SerialGameKeyboardOption slotsSpeakerMass StorageHorizontalmountsInternal mountDiskette drivesHard diskdrivesOther devicesKeyboardSETUPP

Page 3 - Connector Pin Assignments

Epson EL 4S/33Major SubassembliesSerial Port Connectors (CN4 and CN5)Connector Pin AssignmentsParallel Port Connector (CN3)pin 13pin 1pin 25 pin 14Par

Page 4 - System Memory Map

Epson EL 4S/33Game Port Connector (CN1)pin 6pin 1pin 15pin 9Game Port Connector Pin AssignmentsDMA AssignmentsHardware InterruptsIRQ141 HDD controller

Page 5 - Jumper Settings

Epson EL 4S/33System l/O Address MapJumper SettingsPort Jumper SettingsJumpernumberJ2J10J11J15***J27off*1-2*2-3Non-interlaced modeEnables diskette dri

Page 6 - Hard Disk Drive Types

Epson EL 4S/33Processor ChipsSIMM InstallationYou can install a Cyrix Cx83S87-33 math coprocessor on themain system board.The computer comes with 2MB

Page 7 - Installation/Support Tips

Epson EL 4S/33If the computer has an Epson-supplied hard disk drive,select a user-defined drive type and enter the appropriateinformation from the tab

Page 8 - Information Reference List

Epson EL 4S/33Information Reference ListEngineering Change NoticesNone.Technical Information BulletinsNone.Product Support BulletinsNone.Related Docum