Normal Connectors
| CN1 |
Keyboard Connector |
| CN2 |
Power Connector |
| CN3 |
External Battery Connector |
| CN4 |
Front Panel Connector |
| CN5 |
Speaker Connector |
| CN6 |
Turbo Switch Connector |
| CN7 |
Reset Connector |
| CN8 |
Turbo LED Connector |
Jumper
JP3: Monitor type selector, ON : Color, Off : Normal
JP1: Battery Selector, 1-2 : Normal, 2-3 : RTC Discharge
JP14: CPU Clock Selector
|
20 MHz |
25 MHz |
33 MHz |
40 MHz |
50 MHz |
| JP14(1) |
OFF |
ON |
ON |
ON |
OFF |
| JP14(2) |
OFF |
OFF |
ON |
ON |
OFF |
| JP14(3) |
OFF |
OFF |
ON |
OFF |
ON |
VESA Bus Setup
JP17: 1-2 : <= 33 MHz, 2-3 : > 33 MHz
JP16: 1-2 : 0 Wait, 2-3 : 1 Wait
JP18, JP19, JP20 CPU Type Selector
|
486DX/DX2 |
486SX |
487SX |
P24T |
| JP18 |
1-2 |
OFF |
2-3 |
1-2 |
| JP19 |
OFF |
OFF |
OFF |
ON |
| JP20 |
1-2, 3-4 |
2-3 |
1-2, 3-4 |
1-2, 3-4 |
JP5-JP9 : Cache Size Selector
|
64K |
128K |
256K |
| JP5 |
1-2 |
2-3 |
2-3 |
| JP6 |
X |
1-2 |
2-3 |
| JP7 |
2-3 |
1-2 |
2-3 |
| JP8 |
1-2 |
1-2 |
2-3 |
| JP9 |
1-2 |
2-3 |
2-3 |
JP10 : CPU Version Selector
1-2 : Normal, 2-3 : for 80486 New Version
JP2, JP11-JP13, JP15, JP21, JP28 : For Factory Setting & Testing
Purpose Only.
Jumpers and Connectors
CN2 : Power Connector
| Pin |
Assignments |
| 1 |
Power Good |
| 2 |
+5V DC |
| 3 |
+12V DC |
| 4 |
-12V DC |
| 5 |
Ground |
| 6 |
Ground |
| 7 |
Ground |
| 8 |
Ground |
| 9 |
-5V DC |
| 10 |
+5V DC |
| 11 |
+5V DC |
| 12 |
+5V DC |
CN4 : Front Panel (Power LED and Keylock) Connector
| Pin |
Assignments |
| 1 |
+5V DC |
| 2 |
KEY |
| 3 |
Ground |
| 4 |
Keylock |
| 5 |
Ground |
CN6 : Turbo Switch Connector
| Pin |
Assignments |
| 1 |
+5V DC |
| 2 |
Turbo input |
| 3 |
Ground |
CN8 : Turbo LED Connector
| Pin |
Assignments |
| 1 |
Cathode |
| 2 |
Anode |
CN5 : Speaker Connector
| Pin |
Assignments |
| 1 |
Data Out |
| 2 |
Ground |
| 3 |
Ground |
| 4 |
+5V DC |
CN7 : Reset Connector
| Pin |
Assignments |
| 1 |
Reset input |
| 2 |
Ground |
CN3 : External Battery Connector
| Pin |
Assignments |
| 1 |
+6V DC |
| 2 |
KEY |
| 3 |
Ground |
| 4 |
Ground |
CN1 : Keyboard Connector
| Pin |
Assignments |
| 1 |
Keyboard clock |
| 2 |
Keyboard data |
| 3 |
Spare |
| 4 |
Ground |
| 5 |
+5V DC |
Installation of RAM
There are no jumpers for the DRAM configuration. The BIOS will test the
DRAM type and size automatically. All you need to do is just plug in the
SIMM DRAM. There are two banks of memory (Bank0 - Bank1) on the system
board, each consisting of 4 pcs. of SIMM DRAM. The SIMM DRAM can be 256Kx9,
1Mx9 or 4Mx9 modules. The following combinations are possible:
| Bank1 SM8-SM5 |
Bank0 SM4-SM1 |
Total |
|
256KB |
1 MBytes |
| 256KB |
256KB |
2 MBytes |
|
1 MB |
4 MBytes |
| 1 MB |
1 MB |
8 MBytes |
| 4 MB |
1 MB |
20 MBytes |
|
4 MB |
16 MBytes |
| 4 MB |
4 MB |
32 MBytes |
Note: When using two different sizes of DRAM, make sure that only one
size is used in any one bank at a time, and that the smaller of the two,
if both banks are used, goes into Bank0, and the larger in Bank1.
Back to the Motherboards page.
Last modified : 1997/07/24 10:37:12