Epson Endeavor 486C Інформаційний посібник про продукт
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bay for hard disk, diskette drive,
CD-ROM, tape drive, or other
Computer Specifications
CPU and Memory
32-bit CPU
4SX/25C: Intel i486SX, 25 MHz
microprocessor in PGA-type CPU socket;
can be upgraded with optional 487SX/25
or ODP486-25 OverDrive™ processor
4DX/33C: Intel i486DX, 33 MHz
microprocessor in PGA-type CPU socket;
can be upgraded with optional ODP486-33
OverDrive processor
4DX2/50C: Intel i486DX2, 50 MHz
microprocessor in PGA-type CPU socket
System speed
Fast and slow speeds available; fast speed
depends on CPU (25 MHz, 33 MHz, or
50 MHz), slow speed is simulated 8 MHz
speed; speed selection through keyboard
command; 0 wait state memory access at
fast speed
power
button
option card slots
7/15/93
To select slow speed, press the Ctrl, Alt,
and - keys simultaneously. To select
fast speed, press the Ctrl, Alt, and + keys
simultaneously. (Use the - or + key on the
numeric keypad.) Default system speed is
also user-selectable through SETUP
4MB RAM standard; expandable using
Memory
1MB, 4MB, or 16MB SIMMs to 36MB
(maximum); SIMMs must be 36-bit,
fast-page mode type with 70ns (or faster)
access speed
ROM
128KB system BIOS, video BIOS, and
SETUP code located in EPROM on main
system board
512KB DRAM on main system board,
Video RAM
expandable to 1MB using 256k x 4-bit
DRAM ZIP
Shadow RAM
Supports shadowing of system and video
BIOS ROM into RAM
8KB of internal cache (built into the
Cache
microprocessor); expandable to 256KB
using 8KB or 32KB, 70ns SRAM DIP chips
On 4DX/33C and 4DX2/50C systems,
Math
coprocessor
math coprocessor built into the
microprocessor; optional 487 upgrade
available for 4SX/25C system
Clock/calendar
Real-time clock, calendar, and CMOS
RAM socketed on main system board with
built-in battery backup
Controllers
Video
Cirrus® Logic GD5422 VGA controller on
main system board; provides true color
resolutions up to 800 x 600 with 512KB
standard memory; with 1MB upgraded
memory, provides resolutions up to
1280x1024
Controller on main system board supports
Diskette
up to two diskette drives or one diskette
drive and one tape drive
Hard disk
Interface on main system board supports
up to two IDE hard disk drives with
built-in controllers
Interfaces
VGA interface built into main system
Monitor
board for analog or multifrequency VGA
monitor; 15-pin, D-shell connector
EPSON Endeavor 486C
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EPSON Endeavor 486C-1