Epson Equity 486SX/25 PLUS Manuel d'information sur les produits - Page 2
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Computer Specifications
CPU and Memory
32-bit CPU
25 MHz system: 804865X processor,
50 MHz system: 80486DX2/50 processor
System speed
speed is simulated by inserting wait states;
high/low speed selection through software
or keyboard comman d; 0 wait state
memory access at high speed
System memory
4MB RAM standard soldered onto memory
board; base memory of 256KB, 512KB or
640KB selectable through jumpers.
Memory expandable using 256KB or
speed (or faster)
ROM
BIOS)
Shadow RAM
0 wait state acceSS speed; automatically
copies both ROM BIOS and video ROM
Math coprocessor
Standard for 50 MHz model; on 25 MHz
model, 80486SX microprocessor can be
replaced with optional 80487SX chip
Cache controller
82385 (25MHz) standard
Cache RAM
way set associative.
Clock/calendar
Real-time clock, calendar, and
battery backup
Equity Series Computers
Controllers
Diskette
Hard disk
Interfaces
Monitor
Serial
Parallel
Mouse port
Keyboard
Option slots
Power Supply
Type
Input ranges
Maximum outputs
Mass Storage Bays
Internal drive bay
Externally-accessible One third-height and two half-height drives
drive bay
5/12/92
EQUITY 486DX2/50 PLUS
EQUITY 486SX/25 PLUS
Supports up to two drives in any of four
formats: 5%inch, highdensity, 1.2MB;
supports optional Epson tape drive;
controller on main system board
Supports up to two half-height drives;
embedded IDE controller; interface on main
system board
VGA adapter with 1MB DRAM (video
memory) built into main system board;
supports up to 800 x 600 or 1024 x 768
pixels in &colors or up to 640 x 480 pixels
in 256-colors; multi-frequency monitor
required for resolutions over 640 X 480
15-pin, D-shell connector
9-pin, D-shell connector
Standard &bit parallel, mono-directional;
25-pin, D-shell connector
Mini DIN, 6-pin connector for PS/2
compatible mouse or other device
Mini DIN, 6-pin connector for F'S/2
compatible keyboard
Six standard input/output expansion slots
(five 16&t ISA compatible and one &bit
ISA compatible); 8 MHz bus speed
Internal; operation controllable by the Setup
input voltage sensing
98 to 132 VAC and 195 to 264 VAC
6.8 Amps
-12 VDC at .50 Amps, -5 VDC at
Up to five drives maximum
Two half-height or one full-height drives
or one third-height and one full-height
drives
486DX2/50 & 486SX/25 PLUS-l