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Epson 

EL 486UC+

The SX/25, SX/33, and DX/33 processors require a heat sink.

The DX2/50 and DX2/66 processors require a heat sink and

a fan. Make sure jumpers J21, J22, and J15 are set correctly for

the new processor.

Hard Disk Drive Types

The EL 486UC+ comes with a hard disk auto-sensing feature.

when you press 

Enter 

with the cursor positioned on the

Autotype 

Fixed Disk 

option in SETUP, the system

detects the type of hard disk drive you have installed and fills

in the drive information using values in the following table.
Some older or preformatted drives do not support the auto-

sensing feature. If the parameters displayed do not match the

parameters of your hard disk drive, you can define your own

drive type in SETUP.

Hard disk drive types

Drive Option Information

Hard disk drive options for 1-inch IDE drives**

* Select 1 or none for the precomp value. If neither of these options are

available, select the maximum available precomp value.

** Actual hard disk drive installed is subject to availability.

IDE hard disk drive jumper settings

12/1/93

Epson EL 486UC+-5

Summary of Contents for EL 486UC+

Page 1: ...m 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 o...

Page 2: ...5 4nch wide half height drive 3 inch diskette drive 720KB or 1 44MB storage capacity 5 inch diskette drive 360KB or 1 2MB storage capacity 3 nch form factor hard disk drive s up to half height size on a system with three or more option cards the installation of a second hard disk drive may overload the power supply Half height tape drive CD ROM optical drive or other storage device 5 nch or 31 r h...

Page 3: ...Epson EL 486UC Major Subassemblies System Jumper Settings J19 J25 J Jn J aQ J37 Miscellaneous jumper settings J23 Epson EL 486UC 3 ...

Page 4: ...o 1MB by installing four additional DRAM 20 pin 70ns or 80ns 256KB x 4 bit DIP chips Standard video memory Video resolutions and colors External Cache You can install 64KB 128KB or 256KB of external cache on the EL 486UC c3 To install 64KB of external cache use eight SRAM 28 pin 8K x 8 20ns DIP chips and one 8K x 8 20ns tag chip Epson EL 486UC 0 To install 128KB of external cache use four SRAM 28 ...

Page 5: ... you have installed and fills in the drive information using values in the following table Some older or preformatted drives do not support the auto sensing feature If the parameters displayed do not match the parameters of your hard disk drive you can define your own drive type in SETUP Hard disk drive types Drive Option Information Hard disk drive options for 1 inch IDE drives Select 1 or none f...

Page 6: ...Standard diskette drive specifications DMA Assignments Hardware Interrupts System Memory Map 000FFFFFFh 00100000h 000C0000h 000A0000h Epson EL 486UC 6 12 1 93 ...

Page 7: ...ents CN3 Serial port connector pin assignments CN4 and CN5 Keyboard and mouse connector pin assignments CN7 and CN6 VGA port connector pin assignments CN2 Power supply connector pin assignments CN8 Diskette drive connector pin assignments J16 All odd numbered pins are grounds 12 1 93 Epson EL 486UC 7 ...

Page 8: ...Epson EL 486UC Epson EL486UC 8 12 1 93 ...

Page 9: ...low speed by pressing Ctrl Alt and the key on the numeric keypad Try loading the program at slow speed and then switching to fast speed if possible Cl When using a software package that uses a key disk as its copy protection method try loading it at fast speed If this does not work load it at slow speed Installing Option Cards P Although the EL 486UC will support most full length option cards opti...

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