Epson EISA Desktop Product Information Manual

diskette
release
latch

Computer Specifications

Main System Board
System memory 4MB RAM standard on SlMMs; expandable
using 1MB, 2MB, 4MB, or 8MB SIMMs up to
64MB (maximum); SIMMs must be 70ns, 36-
bit, 72-pin gold-leaded, fast-page mode type
Two-part system BIOS; one 64KB permanent
BIOS
BIOS on an EPROM; one 64KB CPU-
dependent BIOS in a ROM device
Automatically copies the system BIOS from
Shadow RAM
ROM into RAM; shadow RAM for
BIOS and external BIOS is software selectable
EISA configuration
8KB SRAM; battery-backup
Real-time clock, calendar, and CMOS RAM
Clock/calendar
for configuration; battery backup
Interfaces
Serial
Two RS-232-C, ISA compatible,
asynchronous; 9-pin D-shell connectors
Parallel ISA compatible, 25-pin, D-shell connector
Mouse Mini DIN, 6-pin connector for PS/2
compatible mouse or other device
Keyboard Mini DIN, 6-pin c onnector for PS/2
compatible keyboard
EISA Series Computers
diskette release
button
\ I I
hard disk diskette. reset
or tape drive bay
button
option slots
Controllers
Diskette and
tape drive
Hard
disk
Processor Board
CPU
Cache memory
Math coprocessor
video
Mass Storage Bays
Power Supply
Type
Input ranges
Maximum current
1/92
EISA Series Desktop
Five 32-bit EISA expansion slots (l6-bit and
8-bit ISA compatible); bus-mastering option
cards allowable in all slots
Internal; operation and volume controllable
by software
Controller on the main system board
supports up to two diskette drives in any of
these formats:
5 'k -inch, highdensity, 1.2MB
5 '/&~h, double-density, 360KB
3 'h-inch. high-density, 1.44MB
3 '/z-inch, double-density, 720KB
Supports one optional tape drive
Interface on the main system board supports
up to two IDE drives with embedded
controllers
486SX/25 board: Intel 80486SX, 25 MHz
microprocessor
486DX/33 board: Intel 80486DX, 33 MHz
microprocessor
Both boards simulated 8MHz and other
processor simulation speeds selectable
through software
486SX/25 board: 8KB internal cache in the
80486SX microprocessor
486DX/33 board: 8KB internal cache in the
80486DX microprocessor; 64KB Intel
82485MA-33 Turbocache module with write
through two-way set associative cache
memory and controller
486SX/25 boar& two sockets available for
optional Weitek WTL4167 and Intel 80487SX
math coprocessors.
486DX/33 board: internal coprocessor in the
80486DX and one socket for an optional
Weitek WTL4167 coprocessor
Up to five devices maximum; internal bay for
two half-height or one full-height hard disk
drives; externally-accessible bay for two half-
height and one third-height or one full-height
and one third-height drives
235W, fan-cooled automatic input voltage
sensing, thermally protected
98 to 132 VAC and 196 to 264 VAC,
47 to 63Hz
At 110 Volts, 6 Amps; at 240 Volts, 3.3 Amps
Desktop-1