Epson Equity 4+ User Manual
EPSON Equity 4+
power
(SPEED)
light
power keyboard
inlet port
hard disk
access light
diskette
drive
bay for hard disk, diskette drive,
CD-ROM, tape drive, or other
option card slots
’ ’
mo”s
poti
serial serial
I
POti’
pod2
\
;F”
power
button
VGA
monitor
poti
Memory
ROM
Video RAM
Shadow RAM
Cache
Math
coprocessor
Clock/calendar
Controllers
Video
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
Computer Specifications
CPU and Memory
32-bit CPU
System speed
4SX/25: Intel®
i-X,
microprocessor in PGA-type CPU socket;
can be upgraded with optional 487SX/25
or ODP486-25 OverDrive™ processor
4DX2/50: Intel
&36DX2,50
microprocessor in PGA-type CPU socket
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
To select slow speed, press the Ctrl, Alt,
and - keys simultaneously. To select
fast speed, press the
simultaneously. (Use the - or + key on the
numeric keypad.) Default system speed is
also user-selectable through SETUP
25 MHz
MHz
Ctrl,
Alt, and + keys
Diskette
Hard disk
Interfaces
Monitor
Parallel
Serial
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
10/1/93
EPSON Equity 4+ 1
EPSON Equity 4+
Keyboard
Mouse
Option slots
Speaker
VGA feature
connector
Mass Storage
Diskette drives
Hard disk drives
Keyboard
Program
PS/2 compatible keyboard interface built
into main system board; num lock setting
selectable through SETUP; 6-pin, mini DIN
connector
PS/2 compatible mouse interface built into
main system board; 6-pin, mini DIN
connector
Four 16-bit (or S-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/110 mm)
Internal, piezo-electric speaker on main
board
IBM compatible VGA pass-through
interface built into main system board;
26-pin connector
Three half-height drives maximum configurable using
the following:
5.25-inch, 1.2MB
3.5inch,
5.25inch, 360KB (double-density) capacity
3.5-inch,
Dual
diskette drive: 3.5inch,
1.2MB
31Wnch form
half-height
mounted horizontally
Half-height tape drive, CD-ROM, or other storage
device;
(high-density) capacity
1.44MB
(high-density) capacity
720KB (double-density) capacity
factor hard disk
size;
the first mounted vertically, second
5Ginch
or
3Wnch
1.44MB
and
5.25-inch,
drtve(s),
up to
with mounting frames
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
Stored in ROM; accessible by pressing the
Delete
key at the SETUP prompt during boot
Video Modes
Mods
VGA
Extended,
512KB
memory required 640 x
Extended,
1 MB memory required
1
Resolution
1640X480
640X480
480
800X600
800X600
Power Supply
Input ranges
Maximum outputs
Frequency
Option Slot Power Limits
Maximum current
For each slot
For all four slots
19Oto264VAC
1+5VDCatllAmps,
+12 VDC at 2.0 Amps,
-5
VDC
-12 VDC at 0.3 Amps
47 to 63 Hz
+5
volts
7
Amps
11 Amps
+12
1.5
2Amps
at 0.3 Amps,
v0ns
Amps 0.3 Amps
Environmental Requirements
Condition
I
Temperature
HumMt
(non-
condensing)
Attitude
Maximum
wet bulb (20° C)
Acoustical
noise
1
Operating
range range
41’
(5’
20% to 90%
-330 to 9,900
(-100 to 3,999 m)
68’
37.5 dB(A)
to
to
F
90’
32O
F
C)
1
Nonoperating
-4’
to
140’
(-20°
to
10% to 90% 10% to 90%
-330 to 39,699 ft330 to
R
(-loOto
104’F
(40° C)
N/A N/A
Physical Characteristics
Width
Depth
Height
Weight
14.8 inches (370 mm)
16.5 inches (412 mm)
4.8 inches (120 mm)
16.7 b (7.5 kg), with one diskette drive and one hard
disk.
but without kevboard
1
colors
1
16
1256
I32K
1
16
I256
-5 Volts and -12
0.3 Amps
1
Storage range
-4’to
F
60’
C)
(-20°
12,ooOm)
(-109 to 12,990 m)
134’F
(57O C)
140’ F
to
60’
39,699 fi
Votts
C)
EPSON Equity 4+ 2
10/1/93
Main System Board Diagram
I
1
CN13
nnnnn
VGA feature
connector
parallel port
I
serial port 2
EPSON Equity 4+
serial port 1 mouse keyboard
/
-
SUPPly
connectors
option card
riser board
connector
video memory
(512KB
optional)
SIMM
sockets
-
-+
OSCl
c
1
5
I)
;
:
5
=
u41
U42
u43
u44
u45
U46
u47
,
u37
LI
L
L
L;
L
L
L
z
-
=
=
u9
z
clc3-
diskette drive
connector
\
hard disk
connector
-
DIP switches
external
cache sockets
>
dtive
I
processor in
PGA socket speaker
battery
connector
10/1/93
I
piezo-electric
jumpers
J4-J9
EPSON Equity 4+ 3
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