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EPSON Equity 4SX/25,4DX/33, and 4DX2/50
power
hard disk
(SPEED) light
access light
diskette
drive
power
button
bay for hard disk, diskette,
tape, CD-ROM, or other drive
11 O/220 VAC switch
.
option card slots
power keyboard
inlet
port
I
&al
Serial
port1
port2
\
VGA
parallel
monitor
mouse
Pofl
poft
Port
Memory
ROM
Video RAM
Shadow RAM
Cache
Math
coprocessor
Clock/calendar
Controllers
Video
Computer Specifications
Diskette
CPU and Memory
32-bit CPU
4SX/25:
Intel
®
#36SX, 25 MHz
microprocessor; can be replaced with
optional
487SX/25
or
ODP486-25
OverDriv&”
processor
4DX/33:
Intel
i486DX,
33 MHz
microprocessor; can be replaced with
optional
ODP486-33
OverDrive
processor
System speed
4DX2/50:
Intel
i486DX2,50
MHz
microprocessor
High and low speeds available; high speed
depends on CPU (25
MHZ,
33 MHz, or
50 MHz), low speed is simulated 8 MHz
speed; speed selection through keyboard
command; 0 wait state memory access at
highspeed
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
lMB,
4MB,
or 16MB
SWIMS
to 32MB (maximum); SlMMs 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
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 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
4/1/93
EPSON Equity-l