Epson EL 486UC Product Information Manual

button
I
monitor cable
AC outlet
AC inlet
COM1 COM2 Parallel

Computer Specifications

CPU and Memory
32-bit CPU Intel 80486SX/25 microprocessor;
upgradable to 486SX/33, 486DX/33,
486DX2/50, or 486DX2/66
System speed Fast and slow speeds available; fast speed
is 25 MHz or the speed of your upgraded
microprocessor, slow speed is 8 MHz;
speed selection through SETUP program
and keyboard commands
To select
and - keys simultaneously. To select
fast speed, press the Ctrl, Alt, and + keys
simultaneously. (Use the - or + key on the
numeric keypad.)
hard disk or diskette
drive bay
slow
speed, press the Ctrl,
Memory
power
ROM
Video RAM
Shadow RAM
Cache
Clock/calendar
Controllers
Video
Diskette
Hard disk
Game
Interfaces
Monitor
Parallel
serial
Game
Alt,
Keyboard
8/15/93
Epson EL 486UC
4MB RAM standard on a SIMM;
expandable to 32MB using 1MB, 4MB,
8MB, and 16MB SIMMs; SIMMs must be
tin-plated, 72-pin, 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 70ns or 80ns,
256KB 4 bit, 20-pin, DIP DRAM chips
x
Supports shadowing of system and video
BIOS ROM into RAM
8KB of internal cache (built into the
microprocessor); supports 32KB or 128KB
of external cache using 28-pin, 8 x 8, 20ns
DIP chips or 28-pin, 32 x 8, 20ns DIP chips
Real-time clock, calendar, and CMOS
RAM contained in 82C206 controller on
system board with NiCad battery
main
backup
Trident TVGA 8900C VGA controller on
main system board; provides resolutions
up to 1024 x 768 in 16 colors (up to
1024 768 in 256 colors with 1MB of video
x
memory)
Controller on main system board supports
up to two diskette drives, maximum
Interface on main system board supports
up to two IDE hard disk drives,
maximum, with built-in controllers on the
hard disk drive itself
VGA interface built into main system
board for analog or multifrequency VGA
monitor; 15-pin, D-shell connector
One standard 8-bit parallel, unidirectional
interface built into main system board;
25-pin, D-shell connector
Two RS-232C, programmable,
asynchronous interfaces built into main
system board; 9-pin, D-shell connectors
One game port interface built into main
system board; 15-pin, D-shell connector
PS/2 compatible keyboard interface built
into main system board; num lock setting
selectable through SETUP; 6-pin, mini
DIN connector
Epson EL 486UC-1