Epson 4SX/25 - Manual

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 VAC switch
. option card slots
power keyboard
inlet
\
VGA
parallel
monitor
mouse
Memory
ROM
Video RAM
Shadow RAM
Cache
Math
coprocessor
Clock/calendar
Controllers
Video
Computer Specifications
Diskette
CPU and Memory
32-bit CPU Intel ® 25 MHz
microprocessor; can be replaced with
optional or
processor
Intel 33 MHz
microprocessor; can be replaced with
optional processor
System speed
Intel MHz
microprocessor
High and low speeds available; high speed
depends on CPU (25 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 Alt,
and keys simultaneously. To select
high speed, press the and + keys
simultaneously. (Use the or + key on the
numeric keypad.)
4MB RAM standard on a SIMM;
expandable using or 16MB
to 32MB (maximum); must
be 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
Supports shadowing of system and video
BIOS ROM into RAM
of internal cache (built into the
microprocessor)
On
and systems, math
coprocessor built into the microprocessor;
optional 487 upgrade available for
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; 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