Epson Equity 4+ User Manual download pdf

EPSON Equity 4+

power

(SPEED)

hard disk

diskette

power

light

access light

drive

button

Memory

bay for hard disk, diskette drive,

CD-ROM, tape drive, or other

option card slots

ROM

Video RAM

Shadow RAM

Cache

Math

coprocessor

Clock/calendar

Controllers

Video

power keyboard

’ ’

serial serial

VGA

inlet port

mo”s

POti’

pod2

monitor

poti

;F”

poti

Diskette

Computer Specifications

CPU and Memory

Hard disk

32-bit CPU

4SX/25: Intel

i-X,

25 MHz

microprocessor in PGA-type CPU socket;

can be upgraded with optional 487SX/25

or ODP486-25 OverDrive™ processor

4DX2/50: Intel

&36DX2,50

MHz

microprocessor in PGA-type CPU socket

Interfaces

Monitor

System speed

Fast and slow speeds available; fast speed

depends on CPU (25 MHz or 50 MHz),

slow is simulated 8 MHz speed; speed

selection through keyboard command; 0

wait state memory access at fast speed

Parallel

To select slow speed, press the Ctrl, Alt,

and - keys simultaneously. To select

fast speed, press the

Ctrl,

Alt, and + keys

simultaneously. (Use the - or + key on the

numeric keypad.) Default system speed is

also user-selectable through SETUP

Serial

4MB RAM standard; expandable using

1MB, 4MB, or 16MB SIMMs to 36MB

(maximum); SIMMs must be 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 256k x 4-bit

DRAM ZIPs

Supports shadowing of system and video

BIOS ROM into RAM

8KB of internal cache (built into the

microprocessor); expandable to 256KB

using 8KB or 32KB, 70ns SRAM DIP chips

On 4DX2/50 system, math coprocessor

built into the microprocessor; optional 487

upgrade available for 4SX/25 system

Real-time clock, calendar, and CMOS

RAM socketed on main system board with

built-in battery backup

Cirrus

Logic GD5422 VGA controller on

main system board; provides true color

resolutions up to 800 x 600 with 512KB

standard memory; with 1MB upgraded

memory, provides resolutions up to

1280 x 1024

Controller on main system board supports

up to two diskette drives or one diskette

drive and one tape drive

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, uni- or bi-

directional interface built into main system

board; I/O address selectable through

SETUP; 25-pin, D-shell connector

Two RS-232C, programmable,

asynchronous interfaces built into main

system board; 9-pin, D-shell connectors

10/1/93

EPSON Equity 4+ 1

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - Computer Specifications

EPSON Equity 4+power(SPEED)hard diskdiskettepowerlightaccess lightdrivebuttonMemorybay for hard disk, diskette drive,CD-ROM, tape drive, or otheroptio

Page 2 - EPSON Equity 4+

EPSON Equity 4+KeyboardPS/2 compatible keyboard interface builtinto main system board; num lock settingselectable through SETUP; 6-pin, mini DINconnec

Page 3 - Main System Board Diagram

EPSON Equity 4+Main System Board Diagramparallel portIserial port 2serial port 1 mouse keyboardI1CN13nnnnn/SUPPlyconnectorsoption card- riser boardcon

Page 4 - Connector Pin Assignments

EPSON Equity 4+Major SubassembliesSerial Port Connectors (CN9 and CN10)batteryICN3diskettedrivedrive baysConnector Pin AssignmentsParallel Port Connec

Page 5 - System I/O Address Map

EPSON Equity 4+VGA Feature Connector (CN14)pin 1pin 25~oooooooooooow,pin 2/’’ pin 26VGA Feafwe Connector Pin Assignments‘Active low togicDMA Assignmen

Page 6 - System Memory Map

EPSON Equity 4+System Memory Map23FFFFF36MBExtended memory01999091MBSystem BIOS(Shadow RAM, 64KB)OOFOCKKIOOEOOOO99C7FFFReserved for system BIOS (64KB)

Page 7 - Cache Memory

EPSON Equity 4+Video MemoryHard Disk Drive TypesIf the computer has 512KB of video memory, you can installfour 256K x 4 bit, 70ns, 20-pin DRAM ZIP (Zi

Page 8 - Information Reference List

EPSON Equity 4+lnstallation / Support TipsMouse and KeyboardCl When connecting the mouse and keyboard to thecomputer, be careful to plug them into the

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Epson Equity 4+ User Manual

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Summary of Contents

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