Hardware User Manual

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EPSON Endeavor L

power

(SPEED)

hard disk

diskette

power

light

accesslight drive

button

Memory

bay for hard disk, diskette drive,

CD-ROM drive, tape drive, or other

option card slots

Video RAM

ROM

Shadow RAM

Cache

Math

coprocessor

Computer Specifications

Clock/calendar

CPU and Memory

32-bit CPU

Intel 486SX, DX, or DX2 processor

upgradable to faster, more powerful

processors, including SX2, DX4, or

Pentium OverDrive processors; DX4

processors require an adapter board to

regulate voltage

Energy Star Low power consumption, Energy Star

compliant in base configurations

(consumes less than 30 Watts)

System speed Fast and slow processor speeds available;

fast speed is the speed of your processor

and slow speed is 8 MHz; 0 wait state

memory access at fast speed

Press Ctrl, Alt, and - to select slow speed or

Ctrl, Alt, and + to select fast speed (use the

- or + on the numeric keypad); default

system speed selectable through SETUP

Controllers

Video

Diskette

Hard disk

Interfaces

Monitor

ISA bus speed for all processors is

8.3 MHz; local bus video speed reflects the

speed of the processor; at fast speed,

DX2/50 and DX2/66 processors run

internally at 50 and 66 MHz, but run

externally at 25 and 33 MHz; local bus

speeds for DX/2 processors are 25 and

33 MHz respectively

4MB RAM standard on system board;

expandable to 36MB using 1MB, 4MB, and

16MB SIMMs; SIMMs must be 72-pin,

32-bit or 36-bit, fast-page mode type with

an access speed of 70ns

128KB system and video BIOS and SETUP

code located in EPROM on main system

board

512KB or 1MB DRAM standard on main

system board; 512KB expandable to 1MB

using a 256 x 16-bit, 40-pin SOJ DRAM

chip

Supports shadowing of system and video

BIOS ROM into RAM

8KB of internal cache on processor;

supports 32KB, 64KB, 128KB, or 256KB of

external cache using 28-pin, 8 x 8, 20ns

DIP chips or 28-pin, 32 x 8, 20ns DIP chips

and 28-pin, 32

8, 15ns tag chips

For SX-based systems, can install an

80487SX processor with math coprocessor

support; math coprocessor built into

DX-based and Pentium OverDrive

processors

Real-time clock, calendar, and CMOS

RAM socketed on main system board with

external 3.6V battery backup

Cirrus Logic CD5428 high speed super

VGA local bus on-board controller with

True Color support

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 controller

Local bus SVGA interface for fixed or

multi-frequency monitor built into system

board; 15-pin, D-shell connector

3/94 EPSON Endeavor L - 1

Summary of content (10 pages)

PAGE 1
EPSON Endeavor L power (SPEED) light hard disk diskette accesslight drive ISA bus speed for all processors is 8.
PAGE 2
EPSON Endeavor L SVGA feature connector SVGA pass-through interface built into main system board; 26-pin connector Parallel 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 Serial Keyboard System security Password (up to 8 characters) defined in SETUP for system boot and keyboard unlock; definable hot key combination locks the keyboard and mouse Virus protection Write protection feature for boot s
PAGE 3
EPSON Endeavor L Major Subassemblies option card J3 SVGA feature connector \ DIP switches micro- - processor - CN3 P battery Jumper and DIP Switch Settings DIP switch settings Jumper settings 1 Jumper 1 Jumper number setting J3 A* B A J4** 1 Switch Switch number setting Function On CPU Installed in PGA socket 3** off CPU not installed in PGA socket On* 4 Password enable off Password disable On* 5 Color monitor off Monochrome monitor I Function Enable the built-in VGA adapter Disable the built-
PAGE 4
PAGE 5
EPSON Endeavor L Use only 32-bit, 72-pin, fast-page mode SIMMs that operate at an access speed of 70ns. If 32-bit SIMMs are unavailable, you can use 36-bit SIMMs instead. System board components and connectors Video Memory This system comes with 512KB or 1MB of video memory. You can increase the video memory to 1MB by installing a video DRAM, 40-pin, 256KB x X-bit, SOJ chip.
PAGE 6
EPSON Endeavor L Microprocessor Upgrades The computer’s processor can be upgraded by replacing the existing microprocessor with a faster one. You can either purchase an upgrade kit from EPSON or buy the individual components separately, as listed in the following table. Microprocessor upgrade components l SX2, DX/33, DX/50, DX2/50, DX2/66, DX4, and Pentium OverDrive processor upgrades require a heat sink.
PAGE 7
EPSON Endeavor L IDE hard disk drive l Hardware Interrupts CS (cable selection) can he jumpered for any configuration. When CS is used, the drive Is a master If pin 28 is grounded, or a slave if pin 28 Is not grounded.
PAGE 8
EPSON Endeavor L System l/O Address Map Connector Pin Assignments Parallel port connector pin assignments (CN8) Serial port connector pin assignments (CN9, CN10) Pin Signal 1 Data canter detect Receive data 2 3 Transmit data Data terminal ready 4 15 1 Ground Pin Signal 6 Data set ready 7 Request to send 6 Clear to send 9 Ring Indicator I I Keyboard connector pin assignments (CN5) Pin 1 2 3 Signal Data Reset Ground Pin Signal 4 Vcc 5 clock 6 NC Mouse connector pin assignments (CN4) Pin 1 2 3 Signal
PAGE 9
EPSON Endeavor L Option card riser board connector pin 1; assignments (CN2) Power supply connector pin assignments (CN1) Diskette drive connector pin assignments (CN11) **All odd-numbered pins are grounds Hard disk drive connector pin assignments (CN12) *Active low logic Option slot connector pin assignments ‘Active low logic Speaker connector pin assignments (SP1) Pin 1 2 Signal Speaker (+) Battery connector pin assignments (CN3) Pin 1 2 Signal RED wire (3.
PAGE 10
EPSON Endeavor L Booting Sequence If you cannot boot the computer from the hard disk, make sure the booting sequence in SETUP is set to A: then C:. Then boot the computer from a system diskette in drive A. Password Make sure that you do not forget the password you set up. If you do: Disable the password by setting DIP switch 4 on the main system board to OFF. Then turn the computer on and off again. Set DIP switch 4 to ON to enable the password function. Run SETUP to enter a new password, if desired.