Epson 4SX-25, 4DX-33, 4DX2-50 User Manual
EPSON Equity 4SX/25,4DX/33, and 4DX2/50
power
(SPEED) light
11 O/220 VAC switch
.
power keyboard
inlet
port
hard disk
access light
bay for hard disk, diskette,
tape, CD-ROM, or other drive
I
mouse
Pofl
diskette
drive
&al Serial
port1 port2
Computer Specifications
CPU and Memory
32-bit CPU
System speed
4SX/25:
Intel® #36SX, 25 MHz
microprocessor; can be replaced with
optional
OverDriv&”
4DX/33:
487SX/25
processor
Intel
i486DX,
or
microprocessor; can be replaced with
optional
4DX2/50:
ODP486-33 OverDrive
Intel
i486DX2,50
microprocessor
High and low speeds available; high speed
depends on CPU (25
50 MHz), low speed is simulated 8 MHz
speed; speed selection through keyboard
command; 0 wait state memory access at
highspeed
option card slots
\
parallel
poft
ODP486-25
33 MHz
processor
MHz
MHZ,
33 MHz, or
power
button
VGA
monitor
Port
Memory
ROM
Video RAM
Shadow RAM
Cache
Math
coprocessor
Clock/calendar
Controllers
Video
Diskette
Hard disk
Interfaces
Monitor
Parallel
Serial
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.)
4MB RAM standard on a SIMM;
expandable using
SWIMS
to 32MB (maximum); SlMMs must
be
36-bit,
fast-page mode type with 70ns
lMB, 4MB,
or 16MB
(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
Supports shadowing of system and video
BIOS ROM into RAM
8KB of internal cache (built into the
microprocessor)
On
4DX/33
and
4DX2/50
systems, 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® VGA controller on main system
board; provides resolutions up to
1024 x 768
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 bidirectional 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
4/1/93
EPSON Equity-l
EPSON Equity 4SX/25, 4DX/33, and 4DX2/50
Keyboard
Mouse
Option slots
Speaker
Alternate VGA
Mass Storage
Horizontal
mounts
Vertical
mount
Diskette drives
Hard disk
drives
Other devices
Keyboard
SETUP Program
PS/2 compatible keyboard interface built
Video Modes
into main system board; num lock setting
selectable through SETUP; 6-pin, mini DIN
connector
pode
~GA
PS/2 compatible mouse interface built into
main system board; 6-pin, mini DIN
connector
Four 16-bit (or 8-bit) I/O expansion slots,
ISA compatible, 8 MHz bus speed; three
slots accommodate any size card,
bottom slot can hold reduced size card
(4.4 inch/l10 mm)
Internal
IBM compatible VGA pass-through
interface built into main system board;
26-pin
CoMector
Three drives maximum (two horizontal
* Hi-Color
l *
Power Supply
Type
Input ranges
mounts and one vertical mount),
configurable using the following:
Up to two externally-accessible,
half-height horizontal mounts; each
horizontal bay can accommodate one
5%inch
CD-ROM, or other drive, or one
form factor diskette, tape,
3&r&
form factor hard disk, diskette, tape,
CD-ROM, or other drive with
5!&nch
Maximum
outputs
Frequent y
Cables
Option Slot Power Limits
mounting frames attached
One internal third- or half-height vertical
mount; vertical bay can accommodate one
3Nnch
drive
5.25~inch, 1.2MB
form factor hard disk or other
(high-density)
Environmental Requirements
3.5~inch, l&MB (highdensity)
5.25-&h,
3.5-&h,
3&-&h
360KB (doubledensity)
720KB (doubledensity)
form factor hard disk drive(s),
third- or half-height size; the first mounted
vertically, second mounted horizontally
Half-height tape drive, CD-ROM drive, or
other storage device;
or
31/1-&h
form factor with
mounting frames attached
Detachable, two-position height; 101 or 102
sculpted keys; countrydependent main
typewriter keyboard; numeric/cursor
control keypad; four-key cursor control
keypad; 12 function keys
5%inch
form factor
51/4-&h
Physical Characteristics
Width 14.8 inches (370 mm)
Depth
Height
weight
Stored in ROM; accessible by pressing the
Delete key at the SETUP prompt during boot
pesolunon
p4o~460
True Color
Maxlmum
Foreachsbt
For all four
current
1
colors
640X460
640x460
640X460
640x460
600X600
600x600
600X600
600X600
1024x766
1024x766 256
I16
256
32,766'
65,536’
16,777,216’*
16
256
32,766'
65,536'
16
145 Watt, fan cooled
98
to 132 VAC and 180 to 264 VAC,
switch-selectable voltage
+5
VDC at 18 Amps,
-5
VDC at 0.3 Amps, -12 VDC at 0.3
47to63Hz
Two to main system board; four to mass
storage devices
+!S
Volts
slots
7 Amps 1.5
16Amps 3Amps 0.5Amps
16.5 inches (412 mm)
4.8 inches (120
16.7 lb (7.5 kg) with one diskette drive and
one hard disk, without keyboard
+12
Volts
Amps
1
Memory required
1512KB
512KB
1MB
1MB
1MB
512KB
512KB
1MB
1MB
512KB
IME
+12
VDC at 4.0 Amps,
-5 Volts and -12 Volts
0.5 Amps
mm)
1
Amps
EPSON Equity-2
4/1/93
Main System Board Diagram
EPSON Equity 4SX/25,4DX/33, and 4DX2/50
VGA feature
connector
standard
512KB
video
memory
optional
512KB
<
VGA video
parallel
serial 2
serial 1
mouse
CN2
keyboard
CN3
ELI-d
QQQ
UlQ
-
-
ml
CPU chip
OverDrive socket
(ZIF
socket)
U18
u21
1
-
power supply
connectors
option board
riser card
connector
7
1
1
1
,I
e
I
SIMM 1
u37
TOSHIBA
U38
A
10
U3Q
mu
CN17CNIS
Ill
3
1
OrlnnlInn
\
CN15
TC6933ES
CN14 CN13 CN12
CNll
\
SIMM0, 4MB SIMM standard
CN
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1
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(PQFP)
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u35
CPU
U27
--1
2
u33
-
FDD connector
-
HDD connector
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4/1/93
EPSON Equity-3
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