OBERON Main Board
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OBERON CPU
CPU related jumper and DIP switch settings
The following PGA type CPUs are supported, all operating at 5V
-SL Enhanced Intel486SX-25MHz
-SL Enhanced Intel486SX-33MHz
- SL Enhanced Intel486DX-25MHz (with built-in coprocessor)
- SL Enhanced Intel486DX-33MHz (with built-in coprocessor)
- SL Enhanced Intel486DX2-50MHz (Coprocessor built-in)
- SL Enhanced Intel486DX2-66MHz (Built-in Coprocessor)
OBERON memory settings
Cache memory capacity setting
(Expansion: Up to 256KB)
main memory
type 72-pin SIMM module
speed 70ns
Volume 4MB,16MB available
expansion
Up to 40MB (default 4M built in bank 0)
How to install
memory size Bank 0 (SIMM1) Bank 1 (SIMM2) Bank 2 (SIMM3) Bank 3 (SIMM4)
4M 4M -- -- --
8M 4M 4M -- --
12M 4M 4M 4M --
16M 4M 4M 4M 4M
20M 4M 16M -- --
24M 4M 4M 16M --
36M 4M 16M 16M --
40M 4M 4M 16M 16M
OBERON Jumper Settings
jumper setting function
J1
1-2 Select 486DX, 486DX2
2-3 Select 486SX PGA-type CPU
DIP SW
CPU clock setting (25 MHz)
SX/25,DX/25,DX2/50
CPU clock setting (33 MHz)
SX/33,DX/33,DX2/66
1 ON OFF
2 OFF ON
3 ON ON
DIP switch settings related to video usage on the main board
jumper setting function
VJ5
1-2*
VGA native vertical frequency: 60Hz, VGA native horizontal
frequency: 31.5KHz
2-3
VGA native vertical frequency: 72Hz, VGA native horizontal
frequency: 38KHz
VJ6
1-2* When using the built-in video adapter
2-3 If you are not using the built-in video adapter
VJ7
1-2* Use Motherboard Hangul
2-3 Motherboard Hangul Not Used
Caution (VJ7): When using other video boards, the Korean language of the motherboard cannot be used.
Resolution-related jumper settings for your monitor
jumper
function
VJ1 VJ2
800*600 vertical frequency
setting
800*600 horizontal frequency setting
1-2* 1-2* 56Hz 35.5KHz
1-2 2-3 60Hz 38KHz
2-3 1-2 72Hz 48KHz
2-3 2-3 56Hz 35.5KHz
VJ3 VJ4
1024*768 vertical frequency
setting
1024*768 horizontal frequency setting
1-2* 1-2* 87Hz(Interlaced) 35.5KHz
1-2 2-3 60Hz(non-Interlaced) 48KHz
2-3 1-2 70(non-Interlaced) 56.6KHz
2-3 2-3 72(non-Interlaced) 58KHz
Cache memory capacity setting (extension: up to 256KB)
jumper 0KB 64KB 128KB 256KB
J3 1-2 2-3 1-2 2-3
J4 1-2 1-2 2-3 1-2
J5 1-2 1-2 1-2 2-3
J6 1-2 1-2 2-3 2-3
DIP SW setting function
4
ON cache available
OFF Cache not available
OBERON Main B/D CMOS SETUP
use key
Enter or 1 ~ 8 Execute
arrow keys Select
Esc Save & Exit
Press the DEL key during booting
Level 1 Step 2 Step 3 Step 4 optional
1. STRAT OPERATING SYSTEM System reboot progress
2. RUN EASY KOREAN CMOS
SETUP
Korean setup screen provided (date, time, A: B: floppy disk, C: D: hard disk, password can be
set)
3. RUN CMOS SETUP Execute setup screen
Date(mm/dd/yy)
Wed, Sep 21 1997 date
Time(hour/min/sec)
10 : 22 : 19 hour
Floppy drive A
1.2MB, 5 1/4 Not.., 360KB 5 1/4, 1.2MB 5 1/4
Floppy drive B
1.44MB, 3 1/2
Not.., 720KB 3 1/2, 1.44MB 3 1/2,
2.88MB 1/2
A: and B: switching
Disabled Disabled/enabled
Hard disk C: Type
30 1~ 47(USER TYPE)/Not Installed
Hard disk D: type
Not Installed
Primary display
VGA/PGA/EGA
VGA/PGA/EGA, Mono.., Color
40x25, Color 80x25, Not Installed
System speed
Fast Fast/Slow
Booting sequence
A: then C: A: then C:/C: only
Diskette seek test
Enabled Disabled/enabled
Green Mode
Disabled Disabled, 5Min ~ 60Min
Base memory
xxx KB
Ext. memory
xxxx KB
Coprocessor
Not Installed
[Shadow options]
System BIOS Shadowed
Video BIOS :Enabled Enabled/Disabled
C8000-CFFFF :Disabled Disabled/Enabled
D0000-D7FFF :Disabled Disabled/Enabled
D8000-DFFFF :Disabled Disabled/Enabled
[Peripherals setup]
Parallel
U-LPT1
U-LPT/B-LPT/ LPT1(3BC)/
LPT2(378)/ LPT3(278)
Serial
COM1 + 2 COM1(3F8)/COM2(2F8)
PS/2 Mouse
Enabled Enabled/Disabled
FDC
Enabled Enabled/Disabled
IDE
Enabled Enabled/Disabled
[Keyboard setup]
Test
Enabled Enabled/Disabled
NumLock
On On/OFF
Key rate
30 2 ~ 30
Key Delay 0.25
4. RUN PASSWORDS password setting
Password state
:Not Installed Not../New../ Installed
Hot Key state
:Not Installed Not../New../ Installed
5. DISPLAY MAIN BOARD HELP
DIP switch, jumper, HDD capacity and type, memory bank composition, and cache memory
information display
6. LOAD DEFAULT VALUES TO
CMOS
'CMOS SETUP' and 'CMOS PASSWORD SETUP' changed to initial values.
7. WRITE(SAVE) TP CMOS AND
EXIT
Save the current setup and reboot
8. DO NOT WRITE TO CMOS
AND EXIT
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