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Epson EL 486UC+

EL 486UC+ Specifications

The following diagrams illustrate the outside of the

EL 486UC+ system.

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32-bit CPU

System speed

Memory

Computer Specifications

AC inlet

AC outlet

MOUSE

PARALLEL

CPU and Memory

ROM

Video RAM

Shadow RAM

Memory

relocation

Cache

Math

coprocessor

Clock/calendar

Controllers

Video

Intel 486SX/25 microprocessor;

upgradable to 486SX/33, 486DX/33,

486DX2/50, or 486DX2/66

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 keyboard

commands or jumper setting

To select slow speed, press Ctrl Alt and-;

to select fasts peed, press Ctrl Alt and+

(use the - or + key on the numeric keypad)

4MB RAM standard on a SIMM;

expandable to 64MB using 1MB, 2MB,

4MB, 8MB, 16MB, and 32MB SIMMs

(64MB maximum requires the use of 32MB

SIMMs; SIMMs must be tin-plated,

72-pin, 32-bit or 36-bit fast-page mode

type with access speed of 70ns or faster

128KB system BIOS, video BIOS, and

SETUP code located in EPROM on main

systemboard

512KB DRAM on main system board;

expandable to 1MB using 70ns or 80ns,

256 x 4

bit,

20-pin,

DIP DRAM chips

Supports shadowing of system and video

BIOS ROM into RAM

Supports relocation of 256KB of memory

from A0000h to BFFFFh and D0000h to

EFFFFh to extended memory

8KB of internal cache (built into the

microprocessor); supports 64KB, 128KB, or

256KB

of external cache using 28-pin,

8x8, 20ns DIP chips or 28-pin, 32x8,

20ns DlP chips

Math coprocessor built into the

microprocessor for DX and DX2 systems

Contained in the 82C491 system controller

along with 64 bytes of CMOS RAM;

backed up by a soldered NiCad

rechargeable battery

Trident 8900CL VGA controller on main

system board; provides resolutions up to

1024 x 768 in 16 colors (up to 1024 x 768 in

256

colors with 1MB of video memory)

12/1/93

Epson EL 486UC+-1

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Sommario

Pagina 1 - Computer Specifications

Epson EL 486UC+EL 486UC+ SpecificationsThe following diagrams illustrate the outside of theEL 486UC+ system.I \dskiuttedrhrefeaetbldton32-bit CPUSyste

Pagina 2 - EL 486UC+

Epson EL 486UC+DisketteHard diskInterfacesMonitorParallelSerialKeyboardMouseOption slotsSpeakerMass storageDiskette drivesHard diskdrivesOther devices

Pagina 3 - Jumper Settings

Epson EL 486UC+Major SubassembliesSystem Jumper SettingsJ19J25J=,Jn,J=,aQJ37Miscellaneous jumper settingsJ23Epson EL 486UC+-3

Pagina 4 - Microprocessor Upgrades

External cache jumper settings*Video memory configuration*If you have no external cache installed, the position of these jumpers doesnot matter.Proces

Pagina 5 - Drive Option Information

Epson EL 486UC+The SX/25, SX/33, and DX/33processors require a heat sink.The DX2/50 and DX2/66 processors require a heat sink anda fan. Make sure jump

Pagina 6 - System Memory Map

Standard diskette drive specificationsDMA AssignmentsHardware InterruptsSystem Memory Map000FFFFFFh00100000h000C0000h000A0000hEpson EL 486UC+-612/1/93

Pagina 7 - Connector Pin Assignments

Epson EL 486UC+System l/O Address MapConnector Pin AssignmentsParallel port connector pin assignments (CN3)Serial port connector pin assignments (CN4

Pagina 8

Epson EL 486UC+Epson EL486UC+-812/1/93

Pagina 9 - Information Reference List

Epson EL 486UC+Installation/Support TipsInstalling Diskette DrivesMake sure that the drive type has been correctly selected inthe SETUP program.Instal

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