Epson EL 4S, EL 33 Product Information Guide
Epson EL 4S/33
reset
button
harddisk ‘ght
access light
hard disk or diskette
drive bay
monitor cable
I
diskette drive
power
button
option
Card
slots
System speed
Memory
ROM
Video RAM
Shadow RAM
Math
coprocessor
Clock/calendar
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
and - keys simultaneously. To select
high speed, press the
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
Ctrl, Alt,
Ctrl, Alt,
and + keys
/
AC inlet AC outlet
\
Kd I I
I I
COM1 COM2 Parallel
Computer Specifications
CPU and Memory
32-bit CPU
Internal cache
Cyrix Cx486SLC, 33 MHz microprocessor
with 16-bit data bus
1KB built into microprocessor
I “AA
I
\
\
Game
Controllers
Video
Diskette
Hard disk
Interfaces
Monitor
Parallel
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
9/93
Epson EL 4S/33-1
Epson EL 4S/33
Serial
Game
Keyboard
Option slots
Speaker
Mass Storage
Horizontal
mounts
Internal mount
Diskette drives
Hard disk
drives
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
Three 16-bit (or 8-bit) full-length and two
8-bit half-length I/O expansion slots, ISA
compatible, 8 MHz bus speed
Internal
Up to four drives (two horizontal mounts
and two internal mounts), configurable
using the following:
Up to two externally-accessible, horizontal
mounts; one horizontal bay can
accommodate a half-height
S%inch
form
factor hard disk, diskette, tape, CD-ROM,
or other drive; the other horizontal bay
can accommodate one third-height
(one-inch) 3%-inch form factor hard disk,
diskette, tape, or other device
Two internal third-height (one-inch)
horizontal mounts; bays can
accommodate
3%~inch
form factor hard
disk or other drives
5.25-inch, 1.2MB (high-density)
3.5-inch, 1.44MB (highdensity)
5.25-inch, 360KB (double-density)
3.5-inch, 720KB (doubledensity)
31&nch
form factor hard disk drive(s),
third- or half-height size
Power Supply
Type
Input ranges 100 to 240 VAC
Maximum
outputs
Frequency 50/60 Hz
Cables
65 Watt, fan cooled
+5 VDC at 7.5 Amps, +12 VDC at
2.0 Amps, -12 VDC at 0.3 Amps
One to main system board; four to mass
storage devices
Option Slot Power Limits
Maximum current +5 volts
For all slots
This system does not support older option cards that may require -5 volts.
4.6
Amps
+12 volts
1.8 Amps
-12 volts
0.3 Amps
Environmental Requirements
Condition 1 Operating
Temperature
Humidity
(noncondensing)
Altitude
range
41° to 90° F
(5° to 32° C)
20% to 90%
-330to9,900ft-330
(-100 to 3,000m) (-100 to 12,000m) (-100 to 12400m)
1
Non-operating
range
-4° to 140° F
(-20° to 60° C)
10% to 90%
to
39,600ft-330to39,600
Storage range
-4° to 140° F
(-20° to 60° C)
10% to 90%
ft
Physical Characteristics
Width 15.6 inches (396 mm)
Depth
Height
Weight
14.5 inches (368 mm)
4.1 inches (104 mm)
15 lb (6.8 kg) without drives or keyboard
Other devices
Half-height tape drive, CD-ROM drive, or
other storage device;
or
mounting frames attached
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 at the SETUP prompt
during boot
Epson EL 4S/33-2
3%~inch
S!&nch
form factor with
form factor
S%nch
9/93
Epson EL 4S/33
Major Subassemblies
Connector Pin Assignments
Parallel Port Connector (CN3)
pin 13
pin 1
Serial Port Connectors (CN4 and CN5)
Serial Port Connector Pin Assignments
Keyboard Connector (CON1)
5
6
pin 5
pin3
pin 1
Signal
clock
Reserved
pin6
pin4-w-
pin 2
Keyboard Connector Pin Assignments
Pin Signal Pin
1
Data 4 +5 VDC
2
Reserved
3
Ground
VGA Port Connector (CN2)
pin 25 pin 14
Parallel Port Connector Pin Assignments
‘Active low logic
VGA Port Connector Pin Assignments
9/93
Epson EL 4S/33-3
Loading...