Epson EL 486UC Product Guide

Epson EL 486UC

button

h&disk ‘@” ===hw

AC inlet

AC outlet

hard disk or diskette drive bay

monitor cable

Icg’ / 1

COM1 COM2 Parallel

power

Game

Memory

ROM

Video RAM

Shadow RAM

Cache

Clock/calendar

Controllers

Video

Diskette

Hard disk

4MB RAM standard on a SIMM; expandable to 32MB using 1MB, 4MB, 8MB, and 16MB SIMMs; SIMMs must be tin-plated, 72-pin, 36-bit, fast-page mode type with 70ns or faster access speed

128KB system BIOS, video BIOS, and SETUP code located in EPROM on main system board

512KB DRAM on main system board; expandable to 1MB using 70ns or 80ns,

256KB x 4 bit, 20-pin, DIP DRAM chips Supports shadowing of system and video

BIOS ROM into RAM 8KB of internal cache (built into the

microprocessor); supports 32KB or 128KB of external cache using 28-pin, 8 x 8, 20ns

DIP chips or 28-pin, 32 x 8, 20ns DIP chips Real-time clock, calendar, and CMOS

RAM contained in 82C206 controller on

main

system board with NiCad battery

backup

Trident TVGA 8900C VGA controller on

main system board; provides resolutions

up to 1024 x 768 in 16 colors (up to

1024 x 768 in 256 colors with 1MB of video

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

Computer Specifications

CPU and Memory

32-bit CPU Intel 80486SX/25 microprocessor;

upgradable to 486SX/33, 486DX/33, 486DX2/50, or 486DX2/66

System speed Fast and slow speeds available; fast speed

is 25 MHz or the speed of your upgraded microprocesso r, slow speed is 8 MHz; speed selection through SETUP program and keyboard commands

To select and - keys simultaneously. To select fast speed, press the Ctrl, Alt, and + keys simultaneously. (Use the - or + key on the numeric keypad.)

slow

speed, press the Ctrl,

Alt,

8/15/93

Interfaces

Monitor

Parallel

serial

Game

Keyboard

VGA interface built into main system

board for analog or multifrequency VGA

monitor; 15-pin, D-shell connector

One standard 8-bit parallel, unidirectional

interface built into main system board;

25-pin, D-shell connector

Two RS-232C, programmable,

asynchronous interfaces built into main

system board; 9-pin, D-shell connectors

One game port interface built into main

system board; 15-pin, D-shell connector PS/2 compatible keyboard interface built

into main system board; num lock setting selectable through SETUP; 6-pin, mini

DIN connector

Epson EL 486UC-1

Epson EL 486UC

Option slots

Three 16-bit (or 8-bit) full-length and two 8-bit half-length I/O expansion slots, ISA compatible, 8.33 MHz bus speed

Speaker

Mass Storage

Internal Three drives maximum (two externally-

accessible mounts and one internal

mount), configurable using the following:

External mounts

Up to two externally-accessible, horizontal

mounts; one horizontal bay can

accommodate a half-height

factor hard disk, diskette, tape, CD-ROM,

or other drive; the other horizontal bay

can accommodate one thud-height

3&r&

tape, or other device

Internal mount

One internal third- or half-height horizontal mount; bay can accommodate one other drive

Diskette drives

5.25-inch, 1.2MB (high-density)

3.5-inch, 1.44MB (high-density)

5.25-inch, 360KB (double-density)

3.5-inch, 720KB (double-density)

Hard disk drives

Other devices

31&nch

third- or half-height size Half-height tape drive, CD-ROM drive, or

other storage device; or

mounting frames attached

5!&inch

form factor hard disk, diskette,

3%~inch

form factor hard disk or

form factor hard disk drive(s),

39.2~inch

51/4-&h

form factor with

form factor

5%~inch

form

Power Supply

Type

Input ranges Maximum +5 VDC at 7.5 Amps, +12 VDC at

outputs Frequency Cables

65 Watt, fan cooled 90 to 260 VAC

2.0 Amps, -12 VDC at 0.3 Amps 47 to 63 Hz

One to main

system

board; four to mass

storage devices

Option Slot Power Limits

+I2

Maximum current For all slots

This system does not support older option cards that tray require -5 volts.

]+5VCR* I4.6Arips 1

Volts

l.BAqm

I-12

volts

10.3Amp

Environmental Requirements

Condition range Temperature

Humidity (non-

condensing) Altitude

Operating

41° to 90° F (5° to 32° C) 20% to 90%

I-33ot09,9wn I(-lwto3.ooom)

Non-operating

range

-4° to 140°F (-20° to 60° C) 10% to 90%

I-33ot039,6ooa

~(-1a0to12000m)~(-100t012,ooOm)J

Storage range

-4° to 140° F (-20° to 60° C) 10% to 90%

1-33Ot039.600n

Major Subassemblies

option card

connector board microprocessor

Keyboard

Detachable, two-position height; 101 or 102 sculpted keys; country-dependent main typewriter keyboard; numeric/cursor control keypad; four-key cursor control keypad; 12 function keys

SETUP

Program

Stored in ROM; accessible by pressing Ctrl, Alt, and S during boot or at the DOS

prompt

Physical Characteristics

Width

Depth 14.5 inches (368 mm) Height

Weight 15 lb (6.8 kg) without drives or keyboard

Epson EL 486UC-2 8/15/93

15.6 inches (396 mm)

4.1 inches (104 mm)

mounting bracket

drive bays

Epson EL 486UC

Jumper Settings

Drive assignment jumper settings

J13

J38 1-2

J14

1-2

Drive assignment Upper drive is A Lower drive is A

External cache

J14

Cache size

32 KB

128 KB

* If you have no external cache installed, the position of these Jumpers does

jumper settings’

J-35 1-2 2-3* 2-3* 2-3* 2-3*

J7 J10 on On 2-3 2-3 2-3 2-3

J36 1-2

1-2

J37

1-2

J11 1-2 1-2

not matter.

Do not remove jumper J42. If J42 is off, your system cannot write to RAM.

SIMM Installation

Jumper settings

Jumper Jumper number setting Function J18

J19

J30

1-2* 2-3 Disables COM1 serial port 1-2*

2-3

1-2*

DOS automatically reassigns parallel and serial ports. Check your DOS manual for more information. If you change this jumper setting to position 2-3, make sum you select MONO for the Video

Enables COM1 serial port

Assigns COM1 serial port as COM1 Assigns COM1 serial port as COM3** Enables COM2 serial port

Card

option In SETUP.

can increase the memory up to 32MB by installing 1MB,

Your computer comes with 4MB of memory on a SIMM. You 4MB, 8MB, and 16MB SIMMs in the computer’s two SIMM

sockets. The following table shows the possible SIMM configurations; do not install memory in any other configuration.

SIMM configuration

Before you install SIMMs, check the following guidelines to ensure that they will work properly:

Use only tin-plated, 36-bit, 72-pin, fast-page mode SIMMs

that operate at an access speed of 70ns (nanoseconds) or faster. Be sure all the SIMMs operate at the same speed.

Use the correct SIMM configuration to add the amount of memory you want. See the table above.

8/15/93

Epson EL 486UC-3

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